organic compounds
2,2′-{[2-(2-Chlorophenyl)-4-methylimidazolidine-1,3-diyl]bis(methylene)}diphenol
aUniversidad Nacional de Colombia, Sede Bogotá, Facultad de Ciencias, Departamento de Química, Cra 30 No.45-03, Bogotá, Código Postal 111321, Colombia, and bInstitute of Physics ASCR, v.v.i., Na Slovance 2, 182 21 Praha 8, Czech Republic
*Correspondence e-mail: ariverau@unal.edu.co
In the title compound, C24H25ClN2O2, the 2-hydroxybenzyl substituents and the 2-chlorophenyl group occupy the sterically preferred equatorial positions, whereas the methyl group occupies the axial position. The imidazolidine ring adopts an with one of the N atoms adjacent to the methylene group as the flap. The chlorophenyl substituent approaches a nearly perpendicular orientation relative to the mean plane of the imidazolidine ring, making a dihedral angle of 73.44 (12)° and the Cl atom is almost coplanar with the C atom bearing the chlorophenyl substituent [Cl—C—C—C torsion angle = 1.1 (3)°]. The hydroxybenzyl groups make dihedral angles of 71.23 (15) and 69.13 (19)° with the mean plane of the heterocyclic ring. The dihedral angle between the two hydroxybenzyl groups is 69.61 (12)°. The molecular structure features two intramolecular O—H⋯N hydrogen bonds with graph-set motif S(6) between the phenolic hydroxyl groups and N atoms.
Related literature
For related structures, see: Rivera et al. (2012a,b). For the synthesis of the title compound, see: Rivera et al. (2013). For bond-length data, see: Allen et al. (1987). For hydrogen-bond graph-set nomenclature, see: Bernstein et al. (1995).
Experimental
Crystal data
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Data collection: CrysAlis PRO (Agilent, 2010); cell CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SUPERFLIP (Palatinus & Chapuis 2007); program(s) used to refine structure: JANA2006 (Petříček et al. 2006); molecular graphics: DIAMOND (Brandenburg & Putz, 2005); software used to prepare material for publication: JANA2006.
Supporting information
10.1107/S1600536813017923/bx2443sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536813017923/bx2443Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536813017923/bx2443Isup3.cml
For the originally reported synthesis, see: Rivera et al. (2013). Single crystals of the title compound (I) were grown from ethanol by recrystallization
The hydroxyl hydrogen atoms were found in difference Fourier maps and their coordinates were refined with a distance restraint d(O—H) = 1.012 Å with σ 0.01. All other H atoms atoms were kept in the geometrically correct positions with C—H distance 0.96 A. The isotropic atomic displacement parameters of hydrogen atoms were evaluated as 1.2×Ueq of the parent atom.
Data collection: CrysAlis PRO (Agilent, 2010); cell
CrysAlis PRO (Agilent, 2010); data reduction: CrysAlis PRO (Agilent, 2010); program(s) used to solve structure: SUPERFLIP (Palatinus & Chapuis 2007); program(s) used to refine structure: JANA2006 (Petříček et al. 2006); molecular graphics: DIAMOND (Brandenburg & Putz, 2005); software used to prepare material for publication: JANA2006 (Petříček et al. 2006).C24H25ClN2O2 | F(000) = 864 |
Mr = 408.9 | Dx = 1.302 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71069 Å |
Hall symbol: -P 2ycb | Cell parameters from 10626 reflections |
a = 7.0281 (2) Å | θ = 2.9–67.0° |
b = 9.7903 (3) Å | µ = 0.21 mm−1 |
c = 30.3813 (6) Å | T = 120 K |
β = 94.168 (2)° | Polygon shape, white |
V = 2084.92 (10) Å3 | 0.24 × 0.15 × 0.08 mm |
Z = 4 |
Agilent Xcalibur (Atlas, Gemini ultra) diffractometer | 3732 independent reflections |
Radiation source: Enhance Ultra (Cu) X-ray Source | 3164 reflections with I > 3σ(I) |
Mirror monochromator | Rint = 0.034 |
Detector resolution: 10.3784 pixels mm-1 | θmax = 25.1°, θmin = 1.3° |
ω scans | h = −8→8 |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2010) | k = −11→11 |
Tmin = 0.392, Tmax = 1 | l = −36→31 |
25057 measured reflections |
Refinement on F | 94 constraints |
R[F2 > 2σ(F2)] = 0.057 | H-atom parameters constrained |
wR(F2) = 0.081 | Weighting scheme based on measured s.u.'s w = 1/(σ2(F) + 0.0004F2) |
S = 2.66 | (Δ/σ)max = 0.024 |
3732 reflections | Δρmax = 1.29 e Å−3 |
268 parameters | Δρmin = −0.33 e Å−3 |
1 restraint |
C24H25ClN2O2 | V = 2084.92 (10) Å3 |
Mr = 408.9 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 7.0281 (2) Å | µ = 0.21 mm−1 |
b = 9.7903 (3) Å | T = 120 K |
c = 30.3813 (6) Å | 0.24 × 0.15 × 0.08 mm |
β = 94.168 (2)° |
Agilent Xcalibur (Atlas, Gemini ultra) diffractometer | 3732 independent reflections |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2010) | 3164 reflections with I > 3σ(I) |
Tmin = 0.392, Tmax = 1 | Rint = 0.034 |
25057 measured reflections |
R[F2 > 2σ(F2)] = 0.057 | 1 restraint |
wR(F2) = 0.081 | H-atom parameters constrained |
S = 2.66 | Δρmax = 1.29 e Å−3 |
3732 reflections | Δρmin = −0.33 e Å−3 |
268 parameters |
Experimental. (CrysAlis PRO; Agilent, 2010) Empirical absorption correction using spherical harmonics, implemented in SCALE3 ABSPACK scaling algorithm. |
Refinement. The refinement was carried out against all reflections. The conventional R-factor is always based on F. The goodness of fit as well as the weighted R-factor are based on F and F2 for refinement carried out on F and F2, respectively. The threshold expression is used only for calculating R-factors etc. and it is not relevant to the choice of reflections for refinement. The program used for refinement, Jana2006, uses the weighting scheme based on the experimental expectations, see _refine_ls_weighting_details, that does not force S to be one. Therefore the values of S are usually larger than the ones from the SHELX program. |
x | y | z | Uiso*/Ueq | ||
Cl1 | 0.47526 (9) | 0.37100 (7) | 0.066197 (19) | 0.0426 (2) | |
O1 | 1.1631 (3) | −0.0315 (2) | 0.09734 (7) | 0.0521 (7) | |
N1 | 0.6652 (3) | 0.10467 (19) | 0.17016 (6) | 0.0276 (5) | |
N2 | 0.7887 (3) | 0.02087 (19) | 0.10763 (6) | 0.0281 (5) | |
O2 | 0.8058 (3) | 0.2490 (2) | 0.24193 (6) | 0.0533 (7) | |
C1 | 0.9092 (3) | −0.1023 (2) | 0.04481 (7) | 0.0313 (7) | |
C2 | 0.7791 (3) | 0.2711 (2) | 0.11711 (7) | 0.0303 (6) | |
C3 | 0.9648 (4) | 0.2880 (2) | 0.13809 (7) | 0.0358 (7) | |
C4 | 0.8047 (4) | 0.5012 (3) | 0.08815 (8) | 0.0408 (8) | |
C6 | 1.0958 (4) | −0.1154 (3) | 0.06367 (8) | 0.0373 (7) | |
C5 | 0.6590 (4) | 0.1942 (3) | 0.26237 (8) | 0.0398 (8) | |
C7 | 0.9840 (4) | 0.5144 (3) | 0.10888 (8) | 0.0439 (8) | |
C8 | 1.1541 (4) | −0.3039 (3) | 0.01561 (7) | 0.0405 (8) | |
C9 | 0.7795 (3) | 0.0089 (2) | 0.05926 (7) | 0.0327 (7) | |
C10 | 0.5015 (4) | 0.1449 (3) | 0.23719 (8) | 0.0374 (7) | |
C11 | 1.2177 (4) | −0.2147 (3) | 0.04910 (8) | 0.0420 (8) | |
C12 | 0.7072 (4) | −0.0978 (2) | 0.12959 (7) | 0.0361 (7) | |
C13 | 0.3618 (4) | 0.0796 (3) | 0.25849 (9) | 0.0468 (9) | |
C14 | 0.5252 (4) | 0.1215 (3) | 0.32865 (8) | 0.0440 (9) | |
C15 | 0.8499 (4) | −0.1925 (3) | 0.01111 (7) | 0.0375 (7) | |
C16 | 0.9707 (4) | −0.2924 (3) | −0.00355 (8) | 0.0415 (8) | |
C17 | 0.6776 (3) | 0.1362 (2) | 0.12301 (7) | 0.0286 (6) | |
C18 | 0.7034 (4) | 0.3801 (2) | 0.09253 (7) | 0.0334 (7) | |
C19 | 0.4922 (4) | 0.1602 (3) | 0.18752 (8) | 0.0410 (8) | |
C20 | 0.6855 (4) | −0.0468 (2) | 0.17574 (8) | 0.0383 (8) | |
C21 | 0.6697 (4) | 0.1850 (3) | 0.30818 (8) | 0.0436 (8) | |
C22 | 0.3725 (5) | 0.0669 (3) | 0.30433 (9) | 0.0513 (10) | |
C23 | 1.0644 (4) | 0.4083 (3) | 0.13432 (8) | 0.0407 (8) | |
C24 | 0.8613 (5) | −0.0821 (3) | 0.20628 (9) | 0.0509 (9) | |
H1c3 | 1.021974 | 0.214303 | 0.155206 | 0.043* | |
H1c4 | 0.749472 | 0.574892 | 0.070745 | 0.049* | |
H1c7 | 1.054201 | 0.597549 | 0.105794 | 0.0527* | |
H1c8 | 1.237584 | −0.373425 | 0.005822 | 0.0486* | |
H1c9 | 0.815069 | 0.094296 | 0.046706 | 0.0392* | |
H2c9 | 0.650655 | −0.010354 | 0.04832 | 0.0392* | |
H1c11 | 1.345868 | −0.22167 | 0.062155 | 0.0504* | |
H1c12 | 0.796755 | −0.171914 | 0.130535 | 0.0433* | |
H2c12 | 0.583691 | −0.118423 | 0.115581 | 0.0433* | |
H1c13 | 0.254234 | 0.041637 | 0.241431 | 0.0562* | |
H1c14 | 0.531698 | 0.11563 | 0.360265 | 0.0528* | |
H1c15 | 0.722369 | −0.185392 | −0.002335 | 0.045* | |
H1c16 | 0.926718 | −0.353119 | −0.026918 | 0.0499* | |
H1c17 | 0.555538 | 0.146235 | 0.106973 | 0.0344* | |
H1c19 | 0.382765 | 0.112164 | 0.174649 | 0.0492* | |
H2c19 | 0.480064 | 0.255055 | 0.179876 | 0.0492* | |
H1c20 | 0.579161 | −0.087302 | 0.188978 | 0.0459* | |
H1c21 | 0.777132 | 0.222541 | 0.325396 | 0.0523* | |
H1c22 | 0.27375 | 0.020425 | 0.31863 | 0.0616* | |
H1c23 | 1.188841 | 0.418716 | 0.1492 | 0.0489* | |
H1c24 | 0.871865 | −0.179534 | 0.209113 | 0.0611* | |
H2c24 | 0.973392 | −0.046657 | 0.194076 | 0.0611* | |
H3c24 | 0.848806 | −0.042368 | 0.234811 | 0.0611* | |
H1 | 1.042 (5) | 0.005 (4) | 0.1092 (11) | 0.0625* | |
H2 | 0.785 (5) | 0.212 (4) | 0.2108 (10) | 0.0639* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cl1 | 0.0468 (4) | 0.0437 (4) | 0.0364 (3) | 0.0097 (3) | −0.0034 (2) | 0.0023 (2) |
O1 | 0.0435 (11) | 0.0589 (13) | 0.0526 (11) | −0.0001 (9) | −0.0056 (8) | −0.0247 (9) |
N1 | 0.0304 (9) | 0.0255 (10) | 0.0272 (9) | −0.0014 (7) | 0.0043 (7) | 0.0034 (7) |
N2 | 0.0372 (10) | 0.0226 (9) | 0.0243 (9) | −0.0034 (7) | 0.0009 (7) | −0.0007 (7) |
O2 | 0.0551 (12) | 0.0583 (13) | 0.0464 (11) | −0.0161 (10) | 0.0039 (8) | −0.0061 (9) |
C1 | 0.0434 (13) | 0.0267 (12) | 0.0243 (10) | −0.0071 (9) | 0.0052 (8) | 0.0018 (8) |
C2 | 0.0372 (12) | 0.0283 (12) | 0.0259 (10) | −0.0002 (9) | 0.0068 (8) | −0.0010 (8) |
C3 | 0.0466 (13) | 0.0259 (12) | 0.0361 (12) | −0.0080 (10) | 0.0104 (10) | −0.0046 (9) |
C4 | 0.0672 (17) | 0.0270 (12) | 0.0306 (12) | −0.0012 (11) | 0.0196 (11) | −0.0022 (9) |
C6 | 0.0465 (14) | 0.0359 (13) | 0.0295 (11) | −0.0031 (10) | 0.0026 (9) | −0.0035 (9) |
C5 | 0.0427 (13) | 0.0392 (14) | 0.0384 (12) | 0.0076 (11) | 0.0093 (10) | 0.0087 (10) |
C7 | 0.0622 (17) | 0.0301 (13) | 0.0420 (13) | −0.0130 (12) | 0.0209 (11) | −0.0062 (10) |
C8 | 0.0570 (16) | 0.0358 (14) | 0.0304 (11) | 0.0025 (11) | 0.0143 (10) | 0.0024 (9) |
C9 | 0.0434 (13) | 0.0281 (12) | 0.0258 (11) | −0.0033 (9) | −0.0021 (9) | 0.0003 (8) |
C10 | 0.0397 (13) | 0.0395 (14) | 0.0337 (12) | 0.0115 (10) | 0.0073 (9) | 0.0046 (9) |
C11 | 0.0479 (15) | 0.0433 (15) | 0.0349 (12) | 0.0027 (12) | 0.0047 (10) | 0.0007 (10) |
C12 | 0.0491 (14) | 0.0249 (12) | 0.0344 (12) | −0.0045 (10) | 0.0034 (10) | 0.0047 (9) |
C13 | 0.0526 (16) | 0.0492 (16) | 0.0402 (14) | 0.0001 (13) | 0.0151 (11) | −0.0013 (11) |
C14 | 0.0668 (18) | 0.0326 (13) | 0.0342 (13) | 0.0154 (12) | 0.0142 (11) | 0.0040 (9) |
C15 | 0.0483 (14) | 0.0361 (13) | 0.0282 (11) | −0.0084 (11) | 0.0036 (9) | −0.0035 (9) |
C16 | 0.0624 (17) | 0.0344 (14) | 0.0291 (11) | −0.0084 (12) | 0.0113 (10) | −0.0072 (9) |
C17 | 0.0296 (11) | 0.0293 (12) | 0.0266 (10) | −0.0010 (9) | −0.0002 (8) | 0.0019 (8) |
C18 | 0.0453 (13) | 0.0308 (12) | 0.0250 (10) | 0.0022 (10) | 0.0092 (9) | −0.0022 (8) |
C19 | 0.0355 (12) | 0.0549 (16) | 0.0329 (12) | 0.0113 (11) | 0.0047 (9) | 0.0066 (10) |
C20 | 0.0508 (14) | 0.0277 (12) | 0.0370 (12) | −0.0068 (10) | 0.0080 (10) | 0.0035 (9) |
C21 | 0.0529 (15) | 0.0400 (14) | 0.0379 (13) | 0.0119 (12) | 0.0042 (11) | 0.0043 (11) |
C22 | 0.0700 (19) | 0.0444 (16) | 0.0423 (14) | −0.0010 (14) | 0.0235 (13) | 0.0041 (12) |
C23 | 0.0421 (13) | 0.0366 (14) | 0.0449 (13) | −0.0096 (11) | 0.0121 (10) | −0.0088 (10) |
C24 | 0.0688 (19) | 0.0407 (16) | 0.0413 (14) | 0.0111 (13) | −0.0097 (12) | −0.0010 (11) |
O1—C6 | 1.369 (3) | C9—H1c9 | 0.96 |
N1—C17 | 1.474 (3) | C9—H2c9 | 0.96 |
N1—C19 | 1.465 (3) | C10—C13 | 1.373 (4) |
N1—C20 | 1.498 (3) | C10—C19 | 1.513 (3) |
N2—C9 | 1.471 (3) | C11—H1c11 | 0.96 |
N2—C12 | 1.476 (3) | C12—C20 | 1.507 (3) |
N2—C17 | 1.468 (3) | C12—H1c12 | 0.96 |
O2—C5 | 1.353 (3) | C12—H2c12 | 0.96 |
C1—C6 | 1.398 (3) | C13—C22 | 1.395 (4) |
C1—C9 | 1.506 (3) | C13—H1c13 | 0.96 |
C1—C15 | 1.392 (3) | C14—C21 | 1.377 (4) |
C2—C3 | 1.420 (3) | C14—C22 | 1.367 (4) |
C2—C17 | 1.518 (3) | C14—H1c14 | 0.96 |
C2—C18 | 1.386 (3) | C15—C16 | 1.389 (4) |
C3—C23 | 1.380 (4) | C15—H1c15 | 0.96 |
C3—H1c3 | 0.96 | C16—H1c16 | 0.96 |
C4—C7 | 1.373 (4) | C17—H1c17 | 0.96 |
C4—C18 | 1.394 (4) | C19—H1c19 | 0.96 |
C4—H1c4 | 0.96 | C19—H2c19 | 0.96 |
C6—C11 | 1.389 (4) | C20—C24 | 1.529 (4) |
C5—C10 | 1.386 (3) | C20—H1c20 | 0.96 |
C5—C21 | 1.391 (3) | C21—H1c21 | 0.96 |
C7—C23 | 1.390 (4) | C22—H1c22 | 0.96 |
C7—H1c7 | 0.96 | C23—H1c23 | 0.96 |
C8—C11 | 1.390 (4) | C24—H1c24 | 0.96 |
C8—C16 | 1.380 (4) | C24—H2c24 | 0.96 |
C8—H1c8 | 0.96 | C24—H3c24 | 0.96 |
C17—N1—C19 | 112.41 (17) | H1c12—C12—H2c12 | 115.07 |
C17—N1—C20 | 107.79 (17) | C10—C13—C22 | 121.6 (3) |
C19—N1—C20 | 113.64 (19) | C10—C13—H1c13 | 119.2 |
C9—N2—C12 | 113.49 (17) | C22—C13—H1c13 | 119.2 |
C9—N2—C17 | 113.18 (17) | C21—C14—C22 | 120.5 (2) |
C12—N2—C17 | 103.20 (17) | C21—C14—H1c14 | 119.73 |
C6—C1—C9 | 121.1 (2) | C22—C14—H1c14 | 119.73 |
C6—C1—C15 | 117.7 (2) | C1—C15—C16 | 121.6 (2) |
C9—C1—C15 | 121.1 (2) | C1—C15—H1c15 | 119.18 |
C3—C2—C17 | 118.20 (19) | C16—C15—H1c15 | 119.18 |
C3—C2—C18 | 117.2 (2) | C8—C16—C15 | 119.8 (2) |
C17—C2—C18 | 124.6 (2) | C8—C16—H1c16 | 120.12 |
C2—C3—C23 | 121.2 (2) | C15—C16—H1c16 | 120.12 |
C2—C3—H1c3 | 119.42 | N1—C17—N2 | 102.62 (16) |
C23—C3—H1c3 | 119.42 | N1—C17—C2 | 110.98 (17) |
C7—C4—C18 | 119.6 (2) | N1—C17—H1c17 | 113.65 |
C7—C4—H1c4 | 120.18 | N2—C17—C2 | 111.48 (18) |
C18—C4—H1c4 | 120.18 | N2—C17—H1c17 | 113.17 |
O1—C6—C1 | 120.9 (2) | C2—C17—H1c17 | 105.14 |
O1—C6—C11 | 118.1 (2) | C2—C18—C4 | 121.8 (2) |
C1—C6—C11 | 121.0 (2) | N1—C19—C10 | 110.23 (19) |
O2—C5—C10 | 119.3 (2) | N1—C19—H1c19 | 109.47 |
O2—C5—C21 | 119.8 (2) | N1—C19—H2c19 | 109.47 |
C10—C5—C21 | 120.9 (2) | C10—C19—H1c19 | 109.47 |
C4—C7—C23 | 120.5 (2) | C10—C19—H2c19 | 109.47 |
C4—C7—H1c7 | 119.77 | H1c19—C19—H2c19 | 108.7 |
C23—C7—H1c7 | 119.76 | N1—C20—C12 | 103.76 (18) |
C11—C8—C16 | 119.9 (2) | N1—C20—C24 | 111.0 (2) |
C11—C8—H1c8 | 120.06 | N1—C20—H1c20 | 112.71 |
C16—C8—H1c8 | 120.06 | C12—C20—C24 | 111.0 (2) |
N2—C9—C1 | 111.43 (18) | C12—C20—H1c20 | 112.78 |
N2—C9—H1c9 | 109.47 | C24—C20—H1c20 | 105.75 |
N2—C9—H2c9 | 109.47 | C5—C21—C14 | 119.5 (2) |
C1—C9—H1c9 | 109.47 | C5—C21—H1c21 | 120.23 |
C1—C9—H2c9 | 109.47 | C14—C21—H1c21 | 120.23 |
H1c9—C9—H2c9 | 107.44 | C13—C22—C14 | 119.2 (3) |
C5—C10—C13 | 118.1 (2) | C13—C22—H1c22 | 120.39 |
C5—C10—C19 | 119.4 (2) | C14—C22—H1c22 | 120.39 |
C13—C10—C19 | 122.4 (2) | C3—C23—C7 | 119.7 (2) |
C6—C11—C8 | 120.0 (2) | C3—C23—H1c23 | 120.14 |
C6—C11—H1c11 | 120 | C7—C23—H1c23 | 120.14 |
C8—C11—H1c11 | 120 | C20—C24—H1c24 | 109.47 |
N2—C12—C20 | 103.23 (18) | C20—C24—H2c24 | 109.47 |
N2—C12—H1c12 | 109.47 | C20—C24—H3c24 | 109.47 |
N2—C12—H2c12 | 109.47 | H1c24—C24—H2c24 | 109.47 |
C20—C12—H1c12 | 109.47 | H1c24—C24—H3c24 | 109.47 |
C20—C12—H2c12 | 109.47 | H2c24—C24—H3c24 | 109.47 |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N2 | 1.01 (3) | 1.79 (3) | 2.721 (3) | 152 (3) |
O2—H2···N1 | 1.01 (3) | 1.79 (3) | 2.723 (3) | 152 (3) |
O1—H1···C9 | 1.01 (3) | 2.31 (3) | 2.883 (3) | 115 (2) |
O2—H2···C19 | 1.01 (3) | 2.19 (4) | 2.796 (3) | 117 (3) |
Experimental details
Crystal data | |
Chemical formula | C24H25ClN2O2 |
Mr | 408.9 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 120 |
a, b, c (Å) | 7.0281 (2), 9.7903 (3), 30.3813 (6) |
β (°) | 94.168 (2) |
V (Å3) | 2084.92 (10) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.21 |
Crystal size (mm) | 0.24 × 0.15 × 0.08 |
Data collection | |
Diffractometer | Agilent Xcalibur (Atlas, Gemini ultra) diffractometer |
Absorption correction | Multi-scan (CrysAlis PRO; Agilent, 2010) |
Tmin, Tmax | 0.392, 1 |
No. of measured, independent and observed [I > 3σ(I)] reflections | 25057, 3732, 3164 |
Rint | 0.034 |
(sin θ/λ)max (Å−1) | 0.598 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.057, 0.081, 2.66 |
No. of reflections | 3732 |
No. of parameters | 268 |
No. of restraints | 1 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 1.29, −0.33 |
Computer programs: CrysAlis PRO (Agilent, 2010), SUPERFLIP (Palatinus & Chapuis 2007), JANA2006 (Petříček et al. 2006), DIAMOND (Brandenburg & Putz, 2005).
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N2 | 1.01 (3) | 1.79 (3) | 2.721 (3) | 152 (3) |
O2—H2···N1 | 1.01 (3) | 1.79 (3) | 2.723 (3) | 152 (3) |
Acknowledgements
We acknowledge the Dirección de Investigaciones, Sede Bogotá (DIB), and the Praemium Academiae project of the Academy of Sciences of the Czech Republic.
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As a continuation of systematic studies into the synthesis, characterization and structural properties of substituted Mannich bases, crystals of the title compound were isolated and characterized crystallographically.
In the title compound (Fig. 1), all values of the geometric parameters are normal (Allen et al., 1987). The largest difference maximum 1.2 e- A-3 coincides with the hydrogen H1—C13 and it could be explained by an atom with the scattering power of 2.2 H atoms. We tried to describe this maximum with an O—H group disordered between C5 (occupancy 0.85) and C13 (occupancy 0.15). The difference maximum decreased to ~0.5 e- A-3, which unfortunately still dominates the difference electron density map and remains at the position of the partially occupied (0.85) H1—C13. Because this disorder complicates the structure description and at the same time does not fully explain the difference maximum, we used for the final CIF the structure model without disorder.
The distances within the imidazolidine ring of the title compund are very similar to those found in related strctures (Rivera et al., 2012a,b). However, the observed N1—C20 bond length [1.498 (3) Å] is shorter in relation to the value observed in related structure [1.513 (2) Å] (Rivera et al., 2012a). The central imidazolidine core bearing a chlorophenyl, a methyl as well as two ortho-hydroxybenzyl groups as substituents, while the orientation of the ortho-hydroxybenzyl substituents on both sides of the imidazolidine ring and the chlorinated phenyl group are the sterically preferred equatorial positions and only the methyl group adopts a axial orientation. The mean plane of the imidazolidine ring defined by C17, N1, C20 makes a dihedral angle of 73.44 (12)° with the chlorophenyl substituent and the chlorine atom is almost coplanar with the C atom bearing the chlorophenyl substituent [Cl1—C18—C2—C17 torsion angle == 1.05 (31)°]. The hydroxybenzyl groups makes an angle of 71.23 (15)° and 69.13 (19)° with the mean plane of heterocyclic ring. The dihedral angle between the two hydroxybenzyl groups is 69.61 (12)°.
The crystal structure of the title confirms the presence of two O—H···N(1,3-imidazolidine) hydrogen bond with graph-set motif S(6) (Bernstein et al. 1995) (Table 1). The N···O distances [N1···O2, 2.723 (3) and N2···O1, 2.721 (3) Å] is longer in comparison with the values observed in related structure (Rivera, et al. 2012b), showing a slightly decrease in hydrogen-bonding strength.