organic compounds
(E)-1-[4-(Hexyloxy)phenyl]-3-(3-hydroxyphenyl)prop-2-en-1-one
aDepartment of Chemistry, Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia, bDepartment of Molecular Biology, Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia, and cX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
*Correspondence e-mail: arazaki@usm.my
There are two molecules in the 21H24O3, in which the dihedral angles between the aromatic rings are 6.4 (1) and 7.0 (1)°. The enone moiety of both molecules adopts an s–cis configuration. In the crystal, intermolecular O—H⋯O and C—H⋯O interactions to the same acceptor O atom generate R21(6) ring motifs and further C—H⋯O interactions generate R22(8) ring motifs. Topologically, the R21(6) and R22(8) ring motifs are arranged alternately, forming [001] chains of molecules. The is further stabilized by C—H⋯π interactions.
of the title compound, CRelated literature
For general background to the biological properties of chalcone derivatives, see: Bhat et al. (2005); Xue et al. (2004); Satyanarayana et al. (2004); Zhao et al. (2005); Yayli et al. (2006). For related structures, see: Razak, Fun, Ngaini, Rahman et al. (2009); Razak, Fun, Ngaini, Fadzillah et al. (2009a,b); Ngaini, Fadzillah et al. (2009); Ngaini, Rahman et al. (2009); Razak et al. (2009a,b). For hydrogen-bond motifs, see: Bernstein et al. (1995). For the stability of the temperature controller used in the data collection, see: Cosier & Glazer (1986). For bond-length data, see: Allen et al. (1987).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2005); cell SAINT (Bruker, 2005); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL.
Supporting information
https://doi.org/10.1107/S1600536810047768/hb5741sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810047768/hb5741Isup2.hkl
A mixture of 3-hydroxybenzaldehyde (1.22 g, 10 mmol) and 4-hexyloxyacetophenone (2.20 ml, 10 mmol) and KOH (2.02 g, 36 mmol) in 30 ml of methanol was heated at reflux for 24 h. The reaction was cooled to room temperature and acidified with cold diluted HCl (2 N). The resulting precipitate was filtered, washed and dried. After a few days of slow evaporation, colourless plates of (I) were collected.
All the H atoms were positioned geometrically and refined using a riding model with C—H = 0.93–0.97 Å. The Uiso values were constrained to be -1.5Ueq (methyl H atoms) and -1.2Ueq (other H atoms). The rotating model group was considered for the methyl group. In the case of O1A and O1B, the hydrogen atoms were located from a difference Fourier map and refined isotropically.
Biological properties of chalcone derivatives such as anticancer (Bhat et al., 2005), antimalarial (Xue et al., 2004), antioxidant and antimicrobial (Yayli et al., 2006), antiplatelet (Zhao et al., 2005) as well as antihyperglycemic (Satyanarayana et al., 2004) activities have been widely reported. We have synthesized in our lab chalcone derivatives possessing alkyl chains which were tested against E. coli ATCC 8739 for their antibacterial activities. In this paper, we report one of these chalcone derivatives, the title compound (I).
There are two crystallographically independent molecules (A and B) in the
(Fig. 1). The bond lengths of (I) have normal values (Allen et al., 1987). In molecule A, the mean plane through the enone moiety (O2/C7/C8/C9) makes a dihedral angle of 4.5 (1)° with the C1—C6 benzene ring whereas the angle is 4.4 (1)° with C10—C15 benzene ring; the corresponding angles are 8.7 (1) and 3.3 (1)°, respectively, for molecule B. The two benzene rings make a dihedral angle of 6.4 (1)° in molecule A and 7.0 (1)° in molecule B. In both molecules, the enone moiety adopts s-cis configuration with C7—C8—C9—O2 torsion angle being 3.7 (2)° in molecule A and 2.2 (2)° in molecule B.The alkoxyl tail in both molecules are roughly coplanar with the attached benzene ring with C16—O3—C13—C14 torsion angles of 5.5 (2)° and 6.2 (2)° for molecules A and B, respectively. These chains initially maintained its planarity with the largest torsion angle deviation from the ideal 180° being 1.3 (1)° and 2.2 (1)° for O3—C16—C17—C18 in molecules A and B, respectively. However, the deviation of the alkoxyl tail from planarity starts in the aliphatic chain. The twist about the C18—C19 bond can be shown from the C17—C18—C19—C20 torsion angle of -165.1 (2)° in molecule A and -167.1 (2)° in molecule B. The twist about the C19—C20 bond are indicated by C18—C19—C20—C21 torsion angles of -67.1 (2)° for molecule A and -64.9 (2)° for molecule B.
In molecule A, the widening of C5—C6—C7 and C6—C7—C8 angles to 123.2 (2)° and 128.0 (2)°, respectively, may be the outcome of the short H5AA···H8AA (2.28 Å) contact. Similarly, strain induced through short H8AA···H11A (2.10 Å) and H14A···H16A (2.35 Å) contacts resulted in the widening of C9—C10—C11 (123.0 (2)°) and O3—C13—C14 (124.8 (2)°) angles, respectively. The distortion of the angles which is relative to what is anticipated in terms of
rules can also be observed in molecule B. The opening of C5—C6—C7 (123.2 (2)°) and C6—C7—C8 (127.8 (2)°) angles is the consequence of the close interatomic contact of H5BA···H8BA (2.30 Å) while the effect of short H8BA···H11B (2.11 Å) contact resulted in the widening of C9—C10—C11 (123.2 (2)°). Likewise, the enlargement of O3—C13—C14 angle to 125.0 (2)° is due to the strain induced by short H14B···H16C (2.35 Å) contact. Similar features can also be found in related structures previously reported (Razak, Fun, Ngaini, Rahman et al., 2009; Razak, Fun, Ngaini, Fadzillah et al., 2009a,b; Ngaini, Fadzillah et al., 2009; Ngaini, Rahman et al., 2009).In the π interactions.
bifurcated acceptor bond is formed by O2A atom in molecule A through O1B—H1OB···O2Ai and C1B—H1BA···O2Ai while similar acceptor bonds involving O2B in molecule B is formed through O1A—H1OA···O2Bii and C1A—H1AA···O2Bii intermolecular interactions (Table 1). These bifurcated acceptor bonds generate R21(6) ring motifs (Bernstein et al., 1995) while intermolecular C12B—H12B···O3Aiii and C12A—H12A···O3Biv interactions involving both molecules generate an R22(8) ring motifs. The R21(6) and R22(8) ring motifs are arranged alternately throughout the structure forming chains down on the c-axis (Fig. 2). The is further stabilized by C—H···For general background to the biological properties of chalcone derivatives, see: Bhat et al. (2005); Xue et al. (2004); Satyanarayana et al. (2004); Zhao et al. (2005); Yayli et al. (2006). For related structures, see: Razak, Fun, Ngaini, Rahman et al. (2009); Razak, Fun, Ngaini, Fadzillah et al. (2009a,b); Ngaini, Fadzillah et al. (2009); Ngaini, Rahman et al. (2009); Razak et al. (2009a,b). For hydrogen-bond motifs, see: Bernstein et al. (1995). For the stability of the temperature controller used in the data collection, see: Cosier & Glazer (1986). For bond-length data, see: Allen et al. (1987).
Data collection: APEX2 (Bruker, 2005); cell
APEX2 (Bruker, 2005); data reduction: SAINT (Bruker, 2005); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).Fig. 1. The asymmetric unit of the title compound, showing 50% probability displacement ellipsoids. | |
Fig. 2. Part of the crystal packing of (I) showing R21(6) and R22(8) ring motifs generated by intermolecular interactions. The symmetry codes are given in Table 1. |
C21H24O3 | Z = 4 |
Mr = 324.40 | F(000) = 696 |
Triclinic, P1 | Dx = 1.236 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 7.6053 (3) Å | Cell parameters from 9989 reflections |
b = 13.7328 (5) Å | θ = 2.7–31.5° |
c = 17.3769 (7) Å | µ = 0.08 mm−1 |
α = 105.226 (2)° | T = 100 K |
β = 93.740 (2)° | Plate, colourless |
γ = 93.038 (2)° | 0.77 × 0.44 × 0.12 mm |
V = 1742.80 (12) Å3 |
Bruker SMART APEXII CCD diffractometer | 10044 independent reflections |
Radiation source: sealed tube | 6371 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.036 |
π and ω scans | θmax = 30.0°, θmin = 1.2° |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | h = −10→10 |
Tmin = 0.940, Tmax = 0.990 | k = −19→19 |
36519 measured reflections | l = −24→23 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.060 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.188 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0965P)2 + 0.6952P] where P = (Fo2 + 2Fc2)/3 |
10044 reflections | (Δ/σ)max < 0.001 |
443 parameters | Δρmax = 0.66 e Å−3 |
0 restraints | Δρmin = −0.28 e Å−3 |
C21H24O3 | γ = 93.038 (2)° |
Mr = 324.40 | V = 1742.80 (12) Å3 |
Triclinic, P1 | Z = 4 |
a = 7.6053 (3) Å | Mo Kα radiation |
b = 13.7328 (5) Å | µ = 0.08 mm−1 |
c = 17.3769 (7) Å | T = 100 K |
α = 105.226 (2)° | 0.77 × 0.44 × 0.12 mm |
β = 93.740 (2)° |
Bruker SMART APEXII CCD diffractometer | 10044 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | 6371 reflections with I > 2σ(I) |
Tmin = 0.940, Tmax = 0.990 | Rint = 0.036 |
36519 measured reflections |
R[F2 > 2σ(F2)] = 0.060 | 0 restraints |
wR(F2) = 0.188 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | Δρmax = 0.66 e Å−3 |
10044 reflections | Δρmin = −0.28 e Å−3 |
443 parameters |
Experimental. The crystal was placed in the cold stream of an Oxford Cryosystems Cobra open-flow nitrogen cryostat (Cosier & Glazer, 1986) operating at 100.0 (1) K. |
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes. |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger. |
x | y | z | Uiso*/Ueq | ||
O1A | −0.04558 (17) | −0.32446 (10) | 0.74767 (8) | 0.0222 (3) | |
O2A | 0.17874 (17) | 0.08611 (9) | 0.57096 (7) | 0.0229 (3) | |
O3A | 0.49336 (16) | 0.12151 (8) | 0.24926 (7) | 0.0193 (3) | |
C1A | 0.0626 (2) | −0.22051 (13) | 0.66575 (10) | 0.0177 (3) | |
H1AA | 0.0344 | −0.1623 | 0.7027 | 0.021* | |
C2A | 0.0299 (2) | −0.31450 (13) | 0.68046 (10) | 0.0181 (3) | |
C3A | 0.0749 (2) | −0.40150 (13) | 0.62610 (11) | 0.0214 (4) | |
H3AA | 0.0551 | −0.4644 | 0.6360 | 0.026* | |
C4A | 0.1498 (2) | −0.39383 (13) | 0.55681 (11) | 0.0226 (4) | |
H4AA | 0.1800 | −0.4521 | 0.5204 | 0.027* | |
C5A | 0.1801 (2) | −0.30062 (13) | 0.54114 (11) | 0.0204 (4) | |
H5AA | 0.2286 | −0.2967 | 0.4942 | 0.025* | |
C6A | 0.1373 (2) | −0.21258 (12) | 0.59617 (10) | 0.0173 (3) | |
C7A | 0.1628 (2) | −0.11143 (13) | 0.58357 (10) | 0.0185 (3) | |
H7AA | 0.1380 | −0.0577 | 0.6257 | 0.022* | |
C8A | 0.2170 (2) | −0.08706 (12) | 0.51938 (11) | 0.0177 (3) | |
H8AA | 0.2481 | −0.1376 | 0.4763 | 0.021* | |
C9A | 0.2285 (2) | 0.01929 (12) | 0.51567 (10) | 0.0161 (3) | |
C10A | 0.2985 (2) | 0.04561 (12) | 0.44537 (10) | 0.0157 (3) | |
C11A | 0.3666 (2) | −0.02568 (12) | 0.38269 (10) | 0.0170 (3) | |
H11A | 0.3692 | −0.0926 | 0.3847 | 0.020* | |
C12A | 0.4293 (2) | 0.00219 (12) | 0.31843 (10) | 0.0178 (3) | |
H12A | 0.4733 | −0.0459 | 0.2773 | 0.021* | |
C13A | 0.4270 (2) | 0.10263 (12) | 0.31485 (10) | 0.0160 (3) | |
C14A | 0.3598 (2) | 0.17511 (12) | 0.37613 (10) | 0.0174 (3) | |
H14A | 0.3576 | 0.2420 | 0.3739 | 0.021* | |
C15A | 0.2965 (2) | 0.14575 (12) | 0.44015 (10) | 0.0177 (3) | |
H15A | 0.2513 | 0.1938 | 0.4809 | 0.021* | |
C16A | 0.5117 (2) | 0.22438 (12) | 0.24321 (11) | 0.0180 (3) | |
H16A | 0.5771 | 0.2680 | 0.2906 | 0.022* | |
H16B | 0.3967 | 0.2500 | 0.2370 | 0.022* | |
C17A | 0.6112 (2) | 0.21984 (12) | 0.17017 (10) | 0.0176 (3) | |
H17A | 0.5423 | 0.1760 | 0.1239 | 0.021* | |
H17B | 0.7215 | 0.1893 | 0.1765 | 0.021* | |
C18A | 0.6523 (2) | 0.32204 (13) | 0.15368 (11) | 0.0205 (4) | |
H18A | 0.7172 | 0.3677 | 0.2003 | 0.025* | |
H18B | 0.5429 | 0.3514 | 0.1433 | 0.025* | |
C19A | 0.7623 (2) | 0.30938 (13) | 0.08122 (11) | 0.0212 (4) | |
H19A | 0.8531 | 0.2637 | 0.0855 | 0.025* | |
H19B | 0.6862 | 0.2780 | 0.0331 | 0.025* | |
C20A | 0.8507 (3) | 0.40815 (13) | 0.07228 (12) | 0.0250 (4) | |
H20A | 0.9201 | 0.4423 | 0.1218 | 0.030* | |
H20B | 0.9308 | 0.3924 | 0.0302 | 0.030* | |
C21A | 0.7195 (3) | 0.47918 (15) | 0.05250 (15) | 0.0370 (5) | |
H21A | 0.7821 | 0.5388 | 0.0463 | 0.056* | |
H21B | 0.6432 | 0.4978 | 0.0951 | 0.056* | |
H21C | 0.6500 | 0.4459 | 0.0036 | 0.056* | |
O1B | 1.03690 (18) | 1.26874 (10) | −0.36389 (8) | 0.0221 (3) | |
O2B | 0.92123 (17) | 0.87058 (9) | −0.16144 (8) | 0.0234 (3) | |
O3B | 0.58649 (17) | 0.83300 (9) | 0.15508 (7) | 0.0211 (3) | |
C1B | 0.9824 (2) | 1.17003 (12) | −0.27030 (10) | 0.0167 (3) | |
H1BA | 1.0148 | 1.1119 | −0.3061 | 0.020* | |
C2B | 0.9882 (2) | 1.26135 (12) | −0.29143 (10) | 0.0167 (3) | |
C3B | 0.9418 (2) | 1.34888 (12) | −0.23752 (11) | 0.0183 (3) | |
H3BA | 0.9450 | 1.4101 | −0.2511 | 0.022* | |
C4B | 0.8907 (2) | 1.34372 (13) | −0.16302 (11) | 0.0192 (4) | |
H4BA | 0.8612 | 1.4022 | −0.1268 | 0.023* | |
C5B | 0.8830 (2) | 1.25322 (13) | −0.14194 (10) | 0.0182 (3) | |
H5BA | 0.8477 | 1.2511 | −0.0921 | 0.022* | |
C6B | 0.9286 (2) | 1.16495 (12) | −0.19592 (10) | 0.0164 (3) | |
C7B | 0.9226 (2) | 1.06597 (12) | −0.17862 (10) | 0.0182 (3) | |
H7BA | 0.9728 | 1.0146 | −0.2148 | 0.022* | |
C8B | 0.8539 (2) | 1.04076 (12) | −0.11739 (10) | 0.0175 (3) | |
H8BA | 0.8028 | 1.0893 | −0.0792 | 0.021* | |
C9B | 0.8582 (2) | 0.93598 (12) | −0.10954 (10) | 0.0165 (3) | |
C10B | 0.7870 (2) | 0.90971 (12) | −0.03963 (10) | 0.0156 (3) | |
C11B | 0.7199 (2) | 0.98105 (12) | 0.02337 (11) | 0.0176 (3) | |
H11B | 0.7202 | 1.0483 | 0.0221 | 0.021* | |
C12B | 0.6538 (2) | 0.95274 (12) | 0.08697 (11) | 0.0184 (3) | |
H12B | 0.6102 | 1.0008 | 0.1282 | 0.022* | |
C13B | 0.6525 (2) | 0.85191 (12) | 0.08946 (10) | 0.0168 (3) | |
C14B | 0.7172 (2) | 0.77927 (12) | 0.02725 (10) | 0.0169 (3) | |
H14B | 0.7155 | 0.7119 | 0.0284 | 0.020* | |
C15B | 0.7835 (2) | 0.80879 (12) | −0.03580 (10) | 0.0170 (3) | |
H15B | 0.8270 | 0.7605 | −0.0769 | 0.020* | |
C16B | 0.5958 (2) | 0.73389 (12) | 0.16826 (10) | 0.0171 (3) | |
H16C | 0.7150 | 0.7123 | 0.1638 | 0.020* | |
H16D | 0.5163 | 0.6847 | 0.1294 | 0.020* | |
C17B | 0.5415 (2) | 0.74426 (12) | 0.25178 (10) | 0.0169 (3) | |
H17C | 0.4226 | 0.7665 | 0.2545 | 0.020* | |
H17D | 0.6192 | 0.7965 | 0.2888 | 0.020* | |
C18B | 0.5463 (2) | 0.64715 (12) | 0.27882 (10) | 0.0178 (3) | |
H18C | 0.6643 | 0.6236 | 0.2758 | 0.021* | |
H18D | 0.4655 | 0.5950 | 0.2435 | 0.021* | |
C19B | 0.4938 (2) | 0.66626 (13) | 0.36472 (11) | 0.0203 (4) | |
H19C | 0.5558 | 0.7288 | 0.3968 | 0.024* | |
H19D | 0.3683 | 0.6756 | 0.3647 | 0.024* | |
C20B | 0.5329 (3) | 0.58199 (14) | 0.40434 (12) | 0.0244 (4) | |
H20C | 0.6577 | 0.5709 | 0.4029 | 0.029* | |
H20D | 0.5080 | 0.6038 | 0.4601 | 0.029* | |
C21B | 0.4270 (3) | 0.48291 (15) | 0.36512 (14) | 0.0372 (5) | |
H21D | 0.4515 | 0.4347 | 0.3950 | 0.056* | |
H21E | 0.4590 | 0.4574 | 0.3114 | 0.056* | |
H21F | 0.3032 | 0.4937 | 0.3642 | 0.056* | |
H1OB | 1.074 (3) | 1.212 (2) | −0.3885 (16) | 0.045 (7)* | |
H1OA | −0.063 (4) | −0.261 (2) | 0.7782 (18) | 0.062 (9)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1A | 0.0294 (7) | 0.0205 (6) | 0.0194 (7) | 0.0003 (5) | 0.0103 (5) | 0.0085 (5) |
O2A | 0.0319 (7) | 0.0226 (6) | 0.0166 (6) | 0.0068 (5) | 0.0104 (5) | 0.0066 (5) |
O3A | 0.0281 (6) | 0.0133 (5) | 0.0186 (6) | 0.0005 (5) | 0.0095 (5) | 0.0064 (5) |
C1A | 0.0193 (8) | 0.0183 (8) | 0.0157 (8) | 0.0027 (6) | 0.0036 (7) | 0.0042 (6) |
C2A | 0.0165 (8) | 0.0234 (8) | 0.0166 (8) | 0.0005 (6) | 0.0046 (7) | 0.0084 (7) |
C3A | 0.0251 (9) | 0.0183 (8) | 0.0226 (9) | 0.0005 (7) | 0.0050 (7) | 0.0082 (7) |
C4A | 0.0278 (9) | 0.0188 (8) | 0.0213 (9) | 0.0044 (7) | 0.0076 (7) | 0.0036 (7) |
C5A | 0.0248 (9) | 0.0226 (8) | 0.0161 (8) | 0.0035 (7) | 0.0071 (7) | 0.0074 (7) |
C6A | 0.0177 (8) | 0.0205 (8) | 0.0149 (8) | 0.0013 (6) | 0.0016 (6) | 0.0069 (6) |
C7A | 0.0208 (8) | 0.0200 (8) | 0.0162 (8) | 0.0035 (6) | 0.0044 (7) | 0.0063 (6) |
C8A | 0.0181 (8) | 0.0178 (8) | 0.0174 (8) | 0.0023 (6) | 0.0047 (7) | 0.0041 (6) |
C9A | 0.0145 (7) | 0.0189 (8) | 0.0153 (8) | 0.0018 (6) | 0.0012 (6) | 0.0050 (6) |
C10A | 0.0146 (7) | 0.0183 (8) | 0.0148 (8) | 0.0011 (6) | 0.0018 (6) | 0.0055 (6) |
C11A | 0.0196 (8) | 0.0142 (7) | 0.0175 (8) | 0.0016 (6) | 0.0027 (7) | 0.0044 (6) |
C12A | 0.0218 (8) | 0.0147 (7) | 0.0163 (8) | 0.0022 (6) | 0.0051 (7) | 0.0020 (6) |
C13A | 0.0150 (7) | 0.0181 (8) | 0.0154 (8) | −0.0005 (6) | 0.0024 (6) | 0.0052 (6) |
C14A | 0.0188 (8) | 0.0153 (7) | 0.0191 (9) | 0.0009 (6) | 0.0040 (7) | 0.0060 (6) |
C15A | 0.0189 (8) | 0.0164 (8) | 0.0170 (8) | 0.0023 (6) | 0.0030 (7) | 0.0026 (6) |
C16A | 0.0211 (8) | 0.0141 (7) | 0.0202 (9) | 0.0004 (6) | 0.0040 (7) | 0.0069 (6) |
C17A | 0.0205 (8) | 0.0166 (8) | 0.0174 (8) | −0.0009 (6) | 0.0031 (7) | 0.0074 (6) |
C18A | 0.0257 (9) | 0.0183 (8) | 0.0197 (9) | −0.0003 (7) | 0.0049 (7) | 0.0084 (7) |
C19A | 0.0253 (9) | 0.0193 (8) | 0.0206 (9) | −0.0003 (7) | 0.0061 (7) | 0.0072 (7) |
C20A | 0.0312 (10) | 0.0228 (9) | 0.0217 (9) | −0.0054 (7) | 0.0058 (8) | 0.0076 (7) |
C21A | 0.0494 (13) | 0.0252 (10) | 0.0437 (13) | 0.0081 (9) | 0.0132 (11) | 0.0185 (9) |
O1B | 0.0327 (7) | 0.0212 (6) | 0.0153 (6) | 0.0026 (5) | 0.0076 (5) | 0.0087 (5) |
O2B | 0.0343 (7) | 0.0193 (6) | 0.0187 (7) | 0.0042 (5) | 0.0120 (6) | 0.0062 (5) |
O3B | 0.0329 (7) | 0.0158 (6) | 0.0195 (6) | 0.0054 (5) | 0.0142 (5) | 0.0096 (5) |
C1B | 0.0182 (8) | 0.0162 (7) | 0.0160 (8) | 0.0008 (6) | 0.0042 (6) | 0.0042 (6) |
C2B | 0.0177 (8) | 0.0202 (8) | 0.0138 (8) | −0.0003 (6) | 0.0023 (6) | 0.0073 (6) |
C3B | 0.0213 (8) | 0.0156 (8) | 0.0200 (9) | −0.0007 (6) | 0.0032 (7) | 0.0082 (6) |
C4B | 0.0210 (8) | 0.0167 (8) | 0.0198 (9) | 0.0007 (6) | 0.0047 (7) | 0.0040 (6) |
C5B | 0.0202 (8) | 0.0208 (8) | 0.0149 (8) | 0.0003 (6) | 0.0058 (7) | 0.0065 (6) |
C6B | 0.0155 (7) | 0.0189 (8) | 0.0163 (8) | −0.0001 (6) | 0.0028 (6) | 0.0074 (6) |
C7B | 0.0219 (8) | 0.0171 (8) | 0.0167 (8) | 0.0013 (6) | 0.0052 (7) | 0.0057 (6) |
C8B | 0.0213 (8) | 0.0169 (8) | 0.0159 (8) | 0.0013 (6) | 0.0052 (7) | 0.0062 (6) |
C9B | 0.0171 (8) | 0.0186 (8) | 0.0148 (8) | −0.0002 (6) | 0.0027 (6) | 0.0058 (6) |
C10B | 0.0152 (7) | 0.0181 (8) | 0.0152 (8) | −0.0002 (6) | 0.0025 (6) | 0.0072 (6) |
C11B | 0.0207 (8) | 0.0150 (7) | 0.0188 (8) | 0.0028 (6) | 0.0040 (7) | 0.0067 (6) |
C12B | 0.0231 (8) | 0.0158 (8) | 0.0181 (9) | 0.0045 (6) | 0.0073 (7) | 0.0056 (6) |
C13B | 0.0164 (8) | 0.0191 (8) | 0.0170 (8) | 0.0009 (6) | 0.0048 (6) | 0.0075 (6) |
C14B | 0.0192 (8) | 0.0144 (7) | 0.0193 (8) | 0.0022 (6) | 0.0061 (7) | 0.0071 (6) |
C15B | 0.0184 (8) | 0.0171 (8) | 0.0163 (8) | 0.0024 (6) | 0.0040 (6) | 0.0053 (6) |
C16B | 0.0208 (8) | 0.0149 (7) | 0.0179 (8) | 0.0021 (6) | 0.0053 (7) | 0.0077 (6) |
C17B | 0.0196 (8) | 0.0162 (8) | 0.0162 (8) | 0.0008 (6) | 0.0054 (6) | 0.0060 (6) |
C18B | 0.0224 (8) | 0.0172 (8) | 0.0166 (8) | 0.0018 (6) | 0.0066 (7) | 0.0080 (6) |
C19B | 0.0261 (9) | 0.0193 (8) | 0.0175 (9) | 0.0018 (7) | 0.0054 (7) | 0.0076 (7) |
C20B | 0.0301 (10) | 0.0255 (9) | 0.0228 (9) | 0.0053 (7) | 0.0081 (8) | 0.0137 (7) |
C21B | 0.0598 (15) | 0.0233 (10) | 0.0336 (12) | −0.0012 (9) | 0.0109 (11) | 0.0155 (9) |
O1A—C2A | 1.369 (2) | O1B—C2B | 1.363 (2) |
O1A—H1OA | 0.92 (3) | O1B—H1OB | 0.85 (3) |
O2A—C9A | 1.237 (2) | O2B—C9B | 1.235 (2) |
O3A—C13A | 1.355 (2) | O3B—C13B | 1.355 (2) |
O3A—C16A | 1.4440 (19) | O3B—C16B | 1.4428 (19) |
C1A—C2A | 1.393 (2) | C1B—C2B | 1.395 (2) |
C1A—C6A | 1.396 (2) | C1B—C6B | 1.399 (2) |
C1A—H1AA | 0.9300 | C1B—H1BA | 0.9300 |
C2A—C3A | 1.389 (2) | C2B—C3B | 1.394 (2) |
C3A—C4A | 1.391 (3) | C3B—C4B | 1.394 (2) |
C3A—H3AA | 0.9300 | C3B—H3BA | 0.9300 |
C4A—C5A | 1.388 (2) | C4B—C5B | 1.384 (2) |
C4A—H4AA | 0.9300 | C4B—H4BA | 0.9300 |
C5A—C6A | 1.399 (2) | C5B—C6B | 1.400 (2) |
C5A—H5AA | 0.9300 | C5B—H5BA | 0.9300 |
C6A—C7A | 1.467 (2) | C6B—C7B | 1.466 (2) |
C7A—C8A | 1.330 (2) | C7B—C8B | 1.331 (2) |
C7A—H7AA | 0.9300 | C7B—H7BA | 0.9300 |
C8A—C9A | 1.477 (2) | C8B—C9B | 1.482 (2) |
C8A—H8AA | 0.9300 | C8B—H8BA | 0.9300 |
C9A—C10A | 1.484 (2) | C9B—C10B | 1.481 (2) |
C10A—C15A | 1.403 (2) | C10B—C15B | 1.404 (2) |
C10A—C11A | 1.407 (2) | C10B—C11B | 1.408 (2) |
C11A—C12A | 1.377 (2) | C11B—C12B | 1.379 (2) |
C11A—H11A | 0.9300 | C11B—H11B | 0.9300 |
C12A—C13A | 1.398 (2) | C12B—C13B | 1.396 (2) |
C12A—H12A | 0.9300 | C12B—H12B | 0.9300 |
C13A—C14A | 1.398 (2) | C13B—C14B | 1.400 (2) |
C14A—C15A | 1.384 (2) | C14B—C15B | 1.379 (2) |
C14A—H14A | 0.9300 | C14B—H14B | 0.9300 |
C15A—H15A | 0.9300 | C15B—H15B | 0.9300 |
C16A—C17A | 1.509 (2) | C16B—C17B | 1.508 (2) |
C16A—H16A | 0.9700 | C16B—H16C | 0.9700 |
C16A—H16B | 0.9700 | C16B—H16D | 0.9700 |
C17A—C18A | 1.525 (2) | C17B—C18B | 1.527 (2) |
C17A—H17A | 0.9700 | C17B—H17C | 0.9700 |
C17A—H17B | 0.9700 | C17B—H17D | 0.9700 |
C18A—C19A | 1.534 (2) | C18B—C19B | 1.529 (2) |
C18A—H18A | 0.9700 | C18B—H18C | 0.9700 |
C18A—H18B | 0.9700 | C18B—H18D | 0.9700 |
C19A—C20A | 1.531 (2) | C19B—C20B | 1.526 (2) |
C19A—H19A | 0.9700 | C19B—H19C | 0.9700 |
C19A—H19B | 0.9700 | C19B—H19D | 0.9700 |
C20A—C21A | 1.517 (3) | C20B—C21B | 1.513 (3) |
C20A—H20A | 0.9700 | C20B—H20C | 0.9700 |
C20A—H20B | 0.9700 | C20B—H20D | 0.9700 |
C21A—H21A | 0.9600 | C21B—H21D | 0.9600 |
C21A—H21B | 0.9600 | C21B—H21E | 0.9600 |
C21A—H21C | 0.9600 | C21B—H21F | 0.9600 |
C2A—O1A—H1OA | 107.6 (18) | C2B—O1B—H1OB | 108.3 (18) |
C13A—O3A—C16A | 119.39 (13) | C13B—O3B—C16B | 119.73 (13) |
C2A—C1A—C6A | 120.84 (16) | C2B—C1B—C6B | 120.76 (15) |
C2A—C1A—H1AA | 119.6 | C2B—C1B—H1BA | 119.6 |
C6A—C1A—H1AA | 119.6 | C6B—C1B—H1BA | 119.6 |
O1A—C2A—C3A | 118.21 (15) | O1B—C2B—C3B | 117.90 (15) |
O1A—C2A—C1A | 121.99 (15) | O1B—C2B—C1B | 122.35 (15) |
C3A—C2A—C1A | 119.80 (16) | C3B—C2B—C1B | 119.75 (15) |
C2A—C3A—C4A | 119.48 (16) | C4B—C3B—C2B | 119.28 (15) |
C2A—C3A—H3AA | 120.3 | C4B—C3B—H3BA | 120.4 |
C4A—C3A—H3AA | 120.3 | C2B—C3B—H3BA | 120.4 |
C5A—C4A—C3A | 121.01 (16) | C5B—C4B—C3B | 121.31 (16) |
C5A—C4A—H4AA | 119.5 | C5B—C4B—H4BA | 119.3 |
C3A—C4A—H4AA | 119.5 | C3B—C4B—H4BA | 119.3 |
C4A—C5A—C6A | 119.79 (16) | C4B—C5B—C6B | 119.71 (16) |
C4A—C5A—H5AA | 120.1 | C4B—C5B—H5BA | 120.1 |
C6A—C5A—H5AA | 120.1 | C6B—C5B—H5BA | 120.1 |
C1A—C6A—C5A | 119.05 (15) | C1B—C6B—C5B | 119.19 (15) |
C1A—C6A—C7A | 117.76 (15) | C1B—C6B—C7B | 117.64 (15) |
C5A—C6A—C7A | 123.17 (16) | C5B—C6B—C7B | 123.17 (15) |
C8A—C7A—C6A | 128.02 (16) | C8B—C7B—C6B | 127.82 (16) |
C8A—C7A—H7AA | 116.0 | C8B—C7B—H7BA | 116.1 |
C6A—C7A—H7AA | 116.0 | C6B—C7B—H7BA | 116.1 |
C7A—C8A—C9A | 120.77 (16) | C7B—C8B—C9B | 120.59 (16) |
C7A—C8A—H8AA | 119.6 | C7B—C8B—H8BA | 119.7 |
C9A—C8A—H8AA | 119.6 | C9B—C8B—H8BA | 119.7 |
O2A—C9A—C8A | 119.90 (16) | O2B—C9B—C10B | 120.05 (15) |
O2A—C9A—C10A | 120.17 (15) | O2B—C9B—C8B | 119.86 (15) |
C8A—C9A—C10A | 119.93 (14) | C10B—C9B—C8B | 120.09 (14) |
C15A—C10A—C11A | 117.86 (16) | C15B—C10B—C11B | 117.80 (15) |
C15A—C10A—C9A | 119.11 (15) | C15B—C10B—C9B | 119.00 (15) |
C11A—C10A—C9A | 123.03 (15) | C11B—C10B—C9B | 123.19 (15) |
C12A—C11A—C10A | 120.96 (15) | C12B—C11B—C10B | 121.04 (15) |
C12A—C11A—H11A | 119.5 | C12B—C11B—H11B | 119.5 |
C10A—C11A—H11A | 119.5 | C10B—C11B—H11B | 119.5 |
C11A—C12A—C13A | 120.12 (15) | C11B—C12B—C13B | 119.99 (15) |
C11A—C12A—H12A | 119.9 | C11B—C12B—H12B | 120.0 |
C13A—C12A—H12A | 119.9 | C13B—C12B—H12B | 120.0 |
O3A—C13A—C12A | 115.01 (14) | O3B—C13B—C12B | 114.92 (14) |
O3A—C13A—C14A | 124.78 (15) | O3B—C13B—C14B | 124.96 (15) |
C12A—C13A—C14A | 120.21 (16) | C12B—C13B—C14B | 120.11 (16) |
C15A—C14A—C13A | 118.93 (15) | C15B—C14B—C13B | 119.23 (15) |
C15A—C14A—H14A | 120.5 | C15B—C14B—H14B | 120.4 |
C13A—C14A—H14A | 120.5 | C13B—C14B—H14B | 120.4 |
C14A—C15A—C10A | 121.91 (15) | C14B—C15B—C10B | 121.81 (15) |
C14A—C15A—H15A | 119.0 | C14B—C15B—H15B | 119.1 |
C10A—C15A—H15A | 119.0 | C10B—C15B—H15B | 119.1 |
O3A—C16A—C17A | 105.46 (13) | O3B—C16B—C17B | 105.71 (13) |
O3A—C16A—H16A | 110.6 | O3B—C16B—H16C | 110.6 |
C17A—C16A—H16A | 110.6 | C17B—C16B—H16C | 110.6 |
O3A—C16A—H16B | 110.6 | O3B—C16B—H16D | 110.6 |
C17A—C16A—H16B | 110.6 | C17B—C16B—H16D | 110.6 |
H16A—C16A—H16B | 108.8 | H16C—C16B—H16D | 108.7 |
C16A—C17A—C18A | 114.68 (14) | C16B—C17B—C18B | 114.30 (14) |
C16A—C17A—H17A | 108.6 | C16B—C17B—H17C | 108.7 |
C18A—C17A—H17A | 108.6 | C18B—C17B—H17C | 108.7 |
C16A—C17A—H17B | 108.6 | C16B—C17B—H17D | 108.7 |
C18A—C17A—H17B | 108.6 | C18B—C17B—H17D | 108.7 |
H17A—C17A—H17B | 107.6 | H17C—C17B—H17D | 107.6 |
C17A—C18A—C19A | 110.30 (14) | C17B—C18B—C19B | 110.22 (14) |
C17A—C18A—H18A | 109.6 | C17B—C18B—H18C | 109.6 |
C19A—C18A—H18A | 109.6 | C19B—C18B—H18C | 109.6 |
C17A—C18A—H18B | 109.6 | C17B—C18B—H18D | 109.6 |
C19A—C18A—H18B | 109.6 | C19B—C18B—H18D | 109.6 |
H18A—C18A—H18B | 108.1 | H18C—C18B—H18D | 108.1 |
C20A—C19A—C18A | 114.49 (15) | C20B—C19B—C18B | 114.61 (14) |
C20A—C19A—H19A | 108.6 | C20B—C19B—H19C | 108.6 |
C18A—C19A—H19A | 108.6 | C18B—C19B—H19C | 108.6 |
C20A—C19A—H19B | 108.6 | C20B—C19B—H19D | 108.6 |
C18A—C19A—H19B | 108.6 | C18B—C19B—H19D | 108.6 |
H19A—C19A—H19B | 107.6 | H19C—C19B—H19D | 107.6 |
C21A—C20A—C19A | 113.07 (16) | C21B—C20B—C19B | 113.65 (16) |
C21A—C20A—H20A | 109.0 | C21B—C20B—H20C | 108.8 |
C19A—C20A—H20A | 109.0 | C19B—C20B—H20C | 108.8 |
C21A—C20A—H20B | 109.0 | C21B—C20B—H20D | 108.8 |
C19A—C20A—H20B | 109.0 | C19B—C20B—H20D | 108.8 |
H20A—C20A—H20B | 107.8 | H20C—C20B—H20D | 107.7 |
C20A—C21A—H21A | 109.5 | C20B—C21B—H21D | 109.5 |
C20A—C21A—H21B | 109.5 | C20B—C21B—H21E | 109.5 |
H21A—C21A—H21B | 109.5 | H21D—C21B—H21E | 109.5 |
C20A—C21A—H21C | 109.5 | C20B—C21B—H21F | 109.5 |
H21A—C21A—H21C | 109.5 | H21D—C21B—H21F | 109.5 |
H21B—C21A—H21C | 109.5 | H21E—C21B—H21F | 109.5 |
C6A—C1A—C2A—O1A | −179.04 (15) | C6B—C1B—C2B—O1B | −178.82 (15) |
C6A—C1A—C2A—C3A | 1.2 (3) | C6B—C1B—C2B—C3B | 0.8 (2) |
O1A—C2A—C3A—C4A | 179.22 (15) | O1B—C2B—C3B—C4B | 179.76 (15) |
C1A—C2A—C3A—C4A | −1.0 (3) | C1B—C2B—C3B—C4B | 0.1 (2) |
C2A—C3A—C4A—C5A | −0.1 (3) | C2B—C3B—C4B—C5B | −0.8 (3) |
C3A—C4A—C5A—C6A | 1.0 (3) | C3B—C4B—C5B—C6B | 0.5 (3) |
C2A—C1A—C6A—C5A | −0.3 (2) | C2B—C1B—C6B—C5B | −1.1 (2) |
C2A—C1A—C6A—C7A | 178.12 (15) | C2B—C1B—C6B—C7B | 178.81 (15) |
C4A—C5A—C6A—C1A | −0.8 (3) | C4B—C5B—C6B—C1B | 0.4 (2) |
C4A—C5A—C6A—C7A | −179.09 (16) | C4B—C5B—C6B—C7B | −179.44 (16) |
C1A—C6A—C7A—C8A | −173.88 (17) | C1B—C6B—C7B—C8B | −170.15 (17) |
C5A—C6A—C7A—C8A | 4.5 (3) | C5B—C6B—C7B—C8B | 9.7 (3) |
C6A—C7A—C8A—C9A | 177.51 (16) | C6B—C7B—C8B—C9B | 179.51 (16) |
C7A—C8A—C9A—O2A | −3.7 (2) | C7B—C8B—C9B—O2B | −2.2 (3) |
C7A—C8A—C9A—C10A | 176.67 (15) | C7B—C8B—C9B—C10B | 177.85 (15) |
O2A—C9A—C10A—C15A | −4.2 (2) | O2B—C9B—C10B—C15B | −3.5 (2) |
C8A—C9A—C10A—C15A | 175.42 (14) | C8B—C9B—C10B—C15B | 176.44 (15) |
O2A—C9A—C10A—C11A | 176.26 (16) | O2B—C9B—C10B—C11B | 177.33 (16) |
C8A—C9A—C10A—C11A | −4.1 (2) | C8B—C9B—C10B—C11B | −2.7 (2) |
C15A—C10A—C11A—C12A | 0.1 (2) | C15B—C10B—C11B—C12B | 0.4 (2) |
C9A—C10A—C11A—C12A | 179.65 (15) | C9B—C10B—C11B—C12B | 179.52 (15) |
C10A—C11A—C12A—C13A | 0.3 (2) | C10B—C11B—C12B—C13B | −0.1 (3) |
C16A—O3A—C13A—C12A | −174.49 (14) | C16B—O3B—C13B—C12B | −173.44 (14) |
C16A—O3A—C13A—C14A | 5.5 (2) | C16B—O3B—C13B—C14B | 6.2 (2) |
C11A—C12A—C13A—O3A | 179.47 (14) | C11B—C12B—C13B—O3B | 179.27 (15) |
C11A—C12A—C13A—C14A | −0.5 (2) | C11B—C12B—C13B—C14B | −0.4 (3) |
O3A—C13A—C14A—C15A | −179.74 (15) | O3B—C13B—C14B—C15B | −179.00 (15) |
C12A—C13A—C14A—C15A | 0.2 (2) | C12B—C13B—C14B—C15B | 0.6 (2) |
C13A—C14A—C15A—C10A | 0.2 (2) | C13B—C14B—C15B—C10B | −0.3 (2) |
C11A—C10A—C15A—C14A | −0.4 (2) | C11B—C10B—C15B—C14B | −0.1 (2) |
C9A—C10A—C15A—C14A | −179.95 (15) | C9B—C10B—C15B—C14B | −179.32 (15) |
C13A—O3A—C16A—C17A | 172.30 (13) | C13B—O3B—C16B—C17B | 170.35 (14) |
O3A—C16A—C17A—C18A | −177.78 (14) | O3B—C16B—C17B—C18B | −178.70 (13) |
C16A—C17A—C18A—C19A | 176.80 (15) | C16B—C17B—C18B—C19B | 178.55 (14) |
C17A—C18A—C19A—C20A | −165.05 (15) | C17B—C18B—C19B—C20B | −167.08 (15) |
C18A—C19A—C20A—C21A | −67.1 (2) | C18B—C19B—C20B—C21B | −64.9 (2) |
Cg1 and Cg3 are the centroids of the C1A–C6A and C1B–C6B rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1B—H1OB···O2Ai | 0.86 (3) | 1.92 (3) | 2.773 (2) | 171 (2) |
C1B—H1BA···O2Ai | 0.93 | 2.50 | 3.196 (2) | 132 |
O1A—H1OA···O2Bii | 0.92 (3) | 1.85 (3) | 2.763 (2) | 175 (3) |
C1A—H1AA···O2Bii | 0.93 | 2.50 | 3.214 (2) | 133 |
C12B—H12B···O3Aiii | 0.93 | 2.56 | 3.483 (2) | 175 |
C12A—H12A···O3Biv | 0.93 | 2.56 | 3.487 (2) | 174 |
C16A—H16A···Cg1v | 0.97 | 2.80 | 3.653 (2) | 147 |
C16B—H16C···Cg3vi | 0.97 | 2.73 | 3.595 (2) | 149 |
C17B—H17C···Cg3vii | 0.97 | 2.74 | 3.640 (2) | 154 |
Symmetry codes: (i) x+1, y+1, z−1; (ii) x−1, y−1, z+1; (iii) x, y+1, z; (iv) x, y−1, z; (v) −x+1, −y, −z+1; (vi) −x+2, −y+2, −z; (vii) −x+1, −y+2, −z. |
Experimental details
Crystal data | |
Chemical formula | C21H24O3 |
Mr | 324.40 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 100 |
a, b, c (Å) | 7.6053 (3), 13.7328 (5), 17.3769 (7) |
α, β, γ (°) | 105.226 (2), 93.740 (2), 93.038 (2) |
V (Å3) | 1742.80 (12) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.08 |
Crystal size (mm) | 0.77 × 0.44 × 0.12 |
Data collection | |
Diffractometer | Bruker SMART APEXII CCD |
Absorption correction | Multi-scan (SADABS; Bruker, 2005) |
Tmin, Tmax | 0.940, 0.990 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 36519, 10044, 6371 |
Rint | 0.036 |
(sin θ/λ)max (Å−1) | 0.703 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.060, 0.188, 1.04 |
No. of reflections | 10044 |
No. of parameters | 443 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.66, −0.28 |
Computer programs: APEX2 (Bruker, 2005), SAINT (Bruker, 2005), SHELXTL (Sheldrick, 2008).
Cg1 and Cg3 are the centroids of the C1A–C6A and C1B–C6B rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1B—H1OB···O2Ai | 0.86 (3) | 1.92 (3) | 2.773 (2) | 171 (2) |
C1B—H1BA···O2Ai | 0.93 | 2.50 | 3.196 (2) | 132 |
O1A—H1OA···O2Bii | 0.92 (3) | 1.85 (3) | 2.763 (2) | 175 (3) |
C1A—H1AA···O2Bii | 0.93 | 2.50 | 3.214 (2) | 133 |
C12B—H12B···O3Aiii | 0.93 | 2.56 | 3.483 (2) | 175 |
C12A—H12A···O3Biv | 0.93 | 2.56 | 3.487 (2) | 174 |
C16A—H16A···Cg1v | 0.97 | 2.80 | 3.653 (2) | 147 |
C16B—H16C···Cg3vi | 0.97 | 2.73 | 3.595 (2) | 149 |
C17B—H17C···Cg3vii | 0.97 | 2.74 | 3.640 (2) | 154 |
Symmetry codes: (i) x+1, y+1, z−1; (ii) x−1, y−1, z+1; (iii) x, y+1, z; (iv) x, y−1, z; (v) −x+1, −y, −z+1; (vi) −x+2, −y+2, −z; (vii) −x+1, −y+2, −z. |
Acknowledgements
HKF and IAR thank the Malaysian Government and Universiti Sains Malaysia (USM) for the Research University grant No. 1001/PFIZIK/811151. ZN and HH thank Universiti Malaysia Sarawak (UMS) for the Geran Penyelidikan Dana Khas Inovasi, grant No. DI/01/2007 (01) and Fundamental Research grant No: FRGS/01(03)/608/2006(41). SMHF thanks the Malaysian Government and UMS for providing a scholarship for postgraduate studies.
References
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
Biological properties of chalcone derivatives such as anticancer (Bhat et al., 2005), antimalarial (Xue et al., 2004), antioxidant and antimicrobial (Yayli et al., 2006), antiplatelet (Zhao et al., 2005) as well as antihyperglycemic (Satyanarayana et al., 2004) activities have been widely reported. We have synthesized in our lab chalcone derivatives possessing alkyl chains which were tested against E. coli ATCC 8739 for their antibacterial activities. In this paper, we report one of these chalcone derivatives, the title compound (I).
There are two crystallographically independent molecules (A and B) in the asymmetric unit (Fig. 1). The bond lengths of (I) have normal values (Allen et al., 1987). In molecule A, the mean plane through the enone moiety (O2/C7/C8/C9) makes a dihedral angle of 4.5 (1)° with the C1—C6 benzene ring whereas the angle is 4.4 (1)° with C10—C15 benzene ring; the corresponding angles are 8.7 (1) and 3.3 (1)°, respectively, for molecule B. The two benzene rings make a dihedral angle of 6.4 (1)° in molecule A and 7.0 (1)° in molecule B. In both molecules, the enone moiety adopts s-cis configuration with C7—C8—C9—O2 torsion angle being 3.7 (2)° in molecule A and 2.2 (2)° in molecule B.
The alkoxyl tail in both molecules are roughly coplanar with the attached benzene ring with C16—O3—C13—C14 torsion angles of 5.5 (2)° and 6.2 (2)° for molecules A and B, respectively. These chains initially maintained its planarity with the largest torsion angle deviation from the ideal 180° being 1.3 (1)° and 2.2 (1)° for O3—C16—C17—C18 in molecules A and B, respectively. However, the deviation of the alkoxyl tail from planarity starts in the aliphatic chain. The twist about the C18—C19 bond can be shown from the C17—C18—C19—C20 torsion angle of -165.1 (2)° in molecule A and -167.1 (2)° in molecule B. The twist about the C19—C20 bond are indicated by C18—C19—C20—C21 torsion angles of -67.1 (2)° for molecule A and -64.9 (2)° for molecule B.
In molecule A, the widening of C5—C6—C7 and C6—C7—C8 angles to 123.2 (2)° and 128.0 (2)°, respectively, may be the outcome of the short H5AA···H8AA (2.28 Å) contact. Similarly, strain induced through short H8AA···H11A (2.10 Å) and H14A···H16A (2.35 Å) contacts resulted in the widening of C9—C10—C11 (123.0 (2)°) and O3—C13—C14 (124.8 (2)°) angles, respectively. The distortion of the angles which is relative to what is anticipated in terms of hybridization rules can also be observed in molecule B. The opening of C5—C6—C7 (123.2 (2)°) and C6—C7—C8 (127.8 (2)°) angles is the consequence of the close interatomic contact of H5BA···H8BA (2.30 Å) while the effect of short H8BA···H11B (2.11 Å) contact resulted in the widening of C9—C10—C11 (123.2 (2)°). Likewise, the enlargement of O3—C13—C14 angle to 125.0 (2)° is due to the strain induced by short H14B···H16C (2.35 Å) contact. Similar features can also be found in related structures previously reported (Razak, Fun, Ngaini, Rahman et al., 2009; Razak, Fun, Ngaini, Fadzillah et al., 2009a,b; Ngaini, Fadzillah et al., 2009; Ngaini, Rahman et al., 2009).
In the crystal structure, bifurcated acceptor bond is formed by O2A atom in molecule A through O1B—H1OB···O2Ai and C1B—H1BA···O2Ai while similar acceptor bonds involving O2B in molecule B is formed through O1A—H1OA···O2Bii and C1A—H1AA···O2Bii intermolecular interactions (Table 1). These bifurcated acceptor bonds generate R21(6) ring motifs (Bernstein et al., 1995) while intermolecular C12B—H12B···O3Aiii and C12A—H12A···O3Biv interactions involving both molecules generate an R22(8) ring motifs. The R21(6) and R22(8) ring motifs are arranged alternately throughout the structure forming chains down on the c-axis (Fig. 2). The crystal structure is further stabilized by C—H···π interactions.