organic compounds
A second monoclinic polymorph of 2-[2-(4-methoxyphenyl)hydrazinylidene]-1,3-diphenylpropane-1,3-dione
aInstituto de Ciencias Químicas, Universidad Austral de Chile, Avda. Los Robles s/n, Campus Isla Teja, Casilla 567, Valdivia, Chile, bDepartamento de Ciencias Físicas, Universidad Andres Bello, Avda. República 220, Santiago de Chile, Chile, cInstituto de Ciencias Moleculares y Microbiología, Universidad Austral de Chile, Avda. Los Robles s/n, Campus Isla Teja, Casilla 567, Valdivia, Chile, and dLaboratorio de Cristalografía, Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Av. Blanco Encalada 2008, Santiago de Chile, Chile
*Correspondence e-mail: lalvarez@unab.cl
The title compound, C22H18N2O3 is the second monoclinic polymorph (P21/c) of the compound, the first being reported in P21 [Bertolasi et al. (1993). J. Chem. Soc. Perkin Trans. 2, pp. 2223–2228]. In the molecular structure of the title compound, the interplanar angle between the benzoyl units is 80.04 (5)°, while the corresponding angles between the phenylhydrazinylidene and benzoyl groups are 36.11 (5) and 55.77 (2)°. A strong resonance-assisted intramolecular N—H⋯O hydrogen bond is found. In the crystal, the entire supramolecular structure is constructed by weak intermolecular C—H⋯O interactions and an inter-ring π–π interaction [centroid–centroid distance = 3.6088 (8) Å].
Related literature
For details of the synthesis, see: Yao (1964). For resonance-assisted hydrogen bonds and related structures, see: Bertolasi et al. (1993); Bustos, Alvarez-Thon, Barría et al. (2011); Bustos, Alvarez-Thon, Cárcamo, Garland & Sánchez (2011).; Bustos, Alvarez-Thon, Cárcamo, Ibañez & Sánchez (2011); Gilli et al. (1993).
Experimental
Crystal data
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Data collection
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Refinement
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Data collection: SMART (Bruker, 2001); cell SAINT (Bruker, 2000); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL-PC (Sheldrick, 2008); software used to prepare material for publication: PLATON (Spek, 2009) and Mercury (Macrae et al., 2006).
Supporting information
10.1107/S1600536811024445/zs2122sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811024445/zs2122Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536811024445/zs2122Isup3.cml
Chemicals: 1,3-diphenylpropane-1,3-dione, p-anisidine and sodium nitrite were procured from Sigma-Aldrich and sodium hydroxide, hydrochloric acid, sodium acetate and solvents from Merck. These chemicals were used without previous purification.
Procedure: A solution of 2.29 g (0.01 mole) of 1,3-diphenylpropane-1,3-dione (98%) in 100 ml of ethanol solution containing 0.4 g (0.01 mole) of sodium hydroxide was buffered by adding 4.80 g of sodium acetate trihydrate. The resulting β-diketonate solution was diluted with water to a volume of about 220 ml and stirred and cooled to -5 °C. A diazonium ion solution was prepared adding 1.24 g (0.01 mole) of p-anisidine (99%) in 8 ml of hydrochloric acid (5 mol/L), cooled to -5 °C, and a saturated aqueous solution containing 0.69 g (0.01 mole) of sodium nitrite was added dropwise . This solution was then added dropwise with vigorous stirring into the buffered β-diketonate solution. During the addition a yellow precipitate was formed which was filtered by suction and washed with an abundant quantity of water. Yield: 95% of crude product. Orange single crystals suitable for X-ray studies were obtained by recrystallization from a concentrated solution of the compound in ethanol.
All hydrogen atoms were found in difference Fourier maps. The hydrogen attached to N2 was refined freely against the diffraction data, but all other H atoms were placed in geometrically idealized positions and constrained to ride on their parent atoms, with aromatic C—H = 0.95 Å, methyl C—H = 0.98 Å and Uiso(H) = 1.2Ueq (aromatic C) or 1.5Ueq(aliphatic C).
Data collection: SMART (Bruker, 2001); cell
SAINT (Bruker, 2000); data reduction: SAINT (Bruker, 2000); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL-PC (Sheldrick, 2008); software used to prepare material for publication: PLATON (Spek, 2009) and Mercury (Macrae et al., 2006).C22H18N2O3 | F(000) = 752 |
Mr = 358.38 | Dx = 1.342 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 999 reflections |
a = 12.3045 (11) Å | θ = 1.8–26.4° |
b = 11.055 (1) Å | µ = 0.09 mm−1 |
c = 14.2435 (13) Å | T = 150 K |
β = 113.683 (1)° | Polyhedron, orange |
V = 1774.3 (3) Å3 | 0.52 × 0.26 × 0.15 mm |
Z = 4 |
Bruker D8 Discover diffractometer with SMART CCD area detector | 2894 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.036 |
Graphite monochromator | θmax = 26.4°, θmin = 1.8° |
ϕ and ω scans | h = −14→15 |
10646 measured reflections | k = −13→13 |
3600 independent reflections | l = −17→17 |
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)] = 0.039 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.105 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | w = 1/[σ2(Fo2) + (0.061P)2] where P = (Fo2 + 2Fc2)/3 |
3600 reflections | (Δ/σ)max = 0.001 |
249 parameters | Δρmax = 0.26 e Å−3 |
0 restraints | Δρmin = −0.18 e Å−3 |
C22H18N2O3 | V = 1774.3 (3) Å3 |
Mr = 358.38 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 12.3045 (11) Å | µ = 0.09 mm−1 |
b = 11.055 (1) Å | T = 150 K |
c = 14.2435 (13) Å | 0.52 × 0.26 × 0.15 mm |
β = 113.683 (1)° |
Bruker D8 Discover diffractometer with SMART CCD area detector | 2894 reflections with I > 2σ(I) |
10646 measured reflections | Rint = 0.036 |
3600 independent reflections |
R[F2 > 2σ(F2)] = 0.039 | 0 restraints |
wR(F2) = 0.105 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | Δρmax = 0.26 e Å−3 |
3600 reflections | Δρmin = −0.18 e Å−3 |
249 parameters |
Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All su's are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles |
Refinement. Refinement on F2 for ALL reflections except those flagged by the user for potential systematic errors. Weighted R-factors wR and all goodnesses of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The observed criterion of F2 > σ(F2) is used only for calculating -R-factor-obs 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 | ||
O1 | 0.23194 (8) | −0.07143 (8) | 0.87203 (6) | 0.0383 (3) | |
O2 | 0.49696 (7) | 0.03714 (8) | 1.12916 (6) | 0.0323 (3) | |
O3 | 0.72539 (8) | 0.62118 (8) | 0.93267 (6) | 0.0344 (3) | |
N1 | 0.39904 (9) | 0.18280 (9) | 0.94790 (7) | 0.0266 (3) | |
N2 | 0.50300 (9) | 0.22036 (9) | 1.01218 (8) | 0.0266 (3) | |
C1 | 0.31024 (11) | −0.05076 (11) | 1.09863 (9) | 0.0270 (4) | |
C2 | 0.35221 (12) | −0.15824 (11) | 1.15131 (9) | 0.0300 (4) | |
C3 | 0.27939 (13) | −0.22881 (12) | 1.18252 (10) | 0.0376 (4) | |
C4 | 0.16617 (13) | −0.18947 (13) | 1.16436 (10) | 0.0410 (5) | |
C5 | 0.12488 (12) | −0.08089 (13) | 1.11449 (10) | 0.0390 (5) | |
C6 | 0.19590 (11) | −0.01201 (12) | 1.08006 (9) | 0.0329 (4) | |
C7 | 0.39245 (11) | 0.02418 (11) | 1.06834 (9) | 0.0266 (4) | |
C8 | 0.34628 (10) | 0.08883 (11) | 0.96964 (9) | 0.0261 (3) | |
C9 | 0.24507 (11) | 0.03874 (11) | 0.88019 (9) | 0.0283 (4) | |
C10 | 0.16409 (10) | 0.12118 (11) | 0.79933 (9) | 0.0285 (4) | |
C11 | 0.10610 (11) | 0.07481 (12) | 0.69998 (9) | 0.0341 (4) | |
C12 | 0.02797 (12) | 0.14692 (14) | 0.62317 (10) | 0.0401 (5) | |
C13 | 0.00466 (12) | 0.26359 (14) | 0.64446 (10) | 0.0431 (5) | |
C14 | 0.06158 (12) | 0.31001 (13) | 0.74235 (10) | 0.0401 (5) | |
C15 | 0.14183 (11) | 0.23937 (12) | 0.81968 (10) | 0.0322 (4) | |
C16 | 0.55535 (10) | 0.32336 (11) | 0.98885 (9) | 0.0246 (4) | |
C17 | 0.49391 (10) | 0.39449 (10) | 0.90350 (9) | 0.0260 (4) | |
C18 | 0.54880 (11) | 0.49364 (11) | 0.88215 (9) | 0.0277 (4) | |
C19 | 0.66431 (11) | 0.52350 (11) | 0.94650 (9) | 0.0272 (4) | |
C20 | 0.72508 (11) | 0.45238 (11) | 1.03236 (9) | 0.0292 (4) | |
C21 | 0.67143 (11) | 0.35237 (11) | 1.05282 (9) | 0.0282 (4) | |
C22 | 0.66773 (12) | 0.69076 (11) | 0.84126 (9) | 0.0338 (4) | |
H1 | 0.5436 (12) | 0.1775 (13) | 1.0677 (11) | 0.041 (4)* | |
H2 | 0.43120 | −0.18360 | 1.16610 | 0.0360* | |
H3 | 0.30730 | −0.30380 | 1.21620 | 0.0450* | |
H4 | 0.11640 | −0.23720 | 1.18620 | 0.0490* | |
H5 | 0.04760 | −0.05330 | 1.10370 | 0.0470* | |
H6 | 0.16650 | 0.06130 | 1.04400 | 0.0390* | |
H11 | 0.12040 | −0.00600 | 0.68540 | 0.0410* | |
H12 | −0.00980 | 0.11610 | 0.55550 | 0.0480* | |
H13 | −0.05060 | 0.31210 | 0.59180 | 0.0520* | |
H14 | 0.04570 | 0.39040 | 0.75660 | 0.0480* | |
H15 | 0.18160 | 0.27180 | 0.88660 | 0.0390* | |
H17 | 0.41430 | 0.37510 | 0.85980 | 0.0310* | |
H18 | 0.50720 | 0.54150 | 0.82310 | 0.0330* | |
H20 | 0.80400 | 0.47290 | 1.07710 | 0.0350* | |
H21 | 0.71390 | 0.30320 | 1.11070 | 0.0340* | |
H22A | 0.64540 | 0.63760 | 0.78130 | 0.0510* | |
H22B | 0.72190 | 0.75360 | 0.83730 | 0.0510* | |
H22C | 0.59640 | 0.72870 | 0.84260 | 0.0510* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0453 (6) | 0.0278 (5) | 0.0359 (5) | −0.0048 (4) | 0.0103 (4) | 0.0012 (4) |
O2 | 0.0266 (5) | 0.0370 (5) | 0.0308 (5) | 0.0004 (4) | 0.0089 (4) | 0.0049 (4) |
O3 | 0.0341 (5) | 0.0326 (5) | 0.0361 (5) | −0.0065 (4) | 0.0137 (4) | 0.0022 (4) |
N1 | 0.0258 (6) | 0.0266 (6) | 0.0273 (5) | 0.0003 (4) | 0.0105 (5) | −0.0019 (4) |
N2 | 0.0252 (6) | 0.0283 (6) | 0.0248 (5) | −0.0007 (4) | 0.0086 (5) | 0.0016 (4) |
C1 | 0.0305 (7) | 0.0269 (7) | 0.0237 (6) | −0.0019 (5) | 0.0111 (5) | −0.0031 (5) |
C2 | 0.0370 (7) | 0.0303 (7) | 0.0242 (6) | −0.0004 (5) | 0.0139 (6) | −0.0023 (5) |
C3 | 0.0543 (9) | 0.0317 (7) | 0.0291 (6) | −0.0062 (6) | 0.0191 (6) | −0.0013 (6) |
C4 | 0.0473 (9) | 0.0464 (9) | 0.0353 (7) | −0.0178 (7) | 0.0228 (7) | −0.0053 (6) |
C5 | 0.0316 (8) | 0.0520 (9) | 0.0355 (7) | −0.0072 (6) | 0.0156 (6) | −0.0072 (6) |
C6 | 0.0314 (7) | 0.0344 (7) | 0.0319 (7) | −0.0002 (6) | 0.0117 (6) | −0.0010 (6) |
C7 | 0.0278 (7) | 0.0251 (6) | 0.0279 (6) | 0.0028 (5) | 0.0122 (6) | −0.0016 (5) |
C8 | 0.0263 (6) | 0.0249 (6) | 0.0280 (6) | 0.0011 (5) | 0.0119 (5) | 0.0007 (5) |
C9 | 0.0294 (7) | 0.0289 (7) | 0.0289 (6) | −0.0019 (5) | 0.0142 (5) | 0.0018 (5) |
C10 | 0.0223 (6) | 0.0343 (7) | 0.0285 (6) | −0.0033 (5) | 0.0099 (5) | 0.0045 (5) |
C11 | 0.0305 (7) | 0.0371 (8) | 0.0327 (7) | −0.0066 (6) | 0.0107 (6) | 0.0014 (6) |
C12 | 0.0322 (8) | 0.0541 (9) | 0.0295 (7) | −0.0070 (6) | 0.0076 (6) | 0.0046 (6) |
C13 | 0.0303 (8) | 0.0575 (10) | 0.0386 (8) | 0.0069 (7) | 0.0107 (6) | 0.0189 (7) |
C14 | 0.0362 (8) | 0.0423 (8) | 0.0449 (8) | 0.0098 (6) | 0.0194 (7) | 0.0104 (6) |
C15 | 0.0296 (7) | 0.0372 (8) | 0.0317 (7) | 0.0017 (6) | 0.0143 (6) | 0.0037 (6) |
C16 | 0.0261 (7) | 0.0251 (7) | 0.0251 (6) | 0.0007 (5) | 0.0128 (5) | −0.0022 (5) |
C17 | 0.0236 (6) | 0.0281 (7) | 0.0251 (6) | 0.0003 (5) | 0.0086 (5) | −0.0032 (5) |
C18 | 0.0296 (7) | 0.0283 (7) | 0.0255 (6) | 0.0022 (5) | 0.0113 (5) | 0.0011 (5) |
C19 | 0.0285 (7) | 0.0265 (6) | 0.0305 (6) | −0.0015 (5) | 0.0158 (5) | −0.0036 (5) |
C20 | 0.0228 (6) | 0.0329 (7) | 0.0300 (6) | 0.0000 (5) | 0.0086 (5) | −0.0030 (5) |
C21 | 0.0278 (7) | 0.0310 (7) | 0.0244 (6) | 0.0039 (5) | 0.0090 (5) | 0.0012 (5) |
C22 | 0.0379 (8) | 0.0295 (7) | 0.0382 (7) | −0.0017 (6) | 0.0197 (6) | 0.0027 (6) |
O1—C9 | 1.2280 (15) | C16—C21 | 1.3884 (19) |
O2—C7 | 1.2368 (16) | C16—C17 | 1.3890 (17) |
O3—C19 | 1.3743 (16) | C17—C18 | 1.3839 (18) |
O3—C22 | 1.4311 (15) | C18—C19 | 1.3866 (19) |
N1—N2 | 1.3062 (15) | C19—C20 | 1.3922 (17) |
N1—C8 | 1.3259 (16) | C20—C21 | 1.3776 (18) |
N2—C16 | 1.4120 (16) | C2—H2 | 0.9500 |
N2—H1 | 0.884 (14) | C3—H3 | 0.9500 |
C1—C6 | 1.391 (2) | C4—H4 | 0.9500 |
C1—C7 | 1.4988 (19) | C5—H5 | 0.9500 |
C1—C2 | 1.3893 (17) | C6—H6 | 0.9500 |
C2—C3 | 1.389 (2) | C11—H11 | 0.9500 |
C3—C4 | 1.381 (2) | C12—H12 | 0.9500 |
C4—C5 | 1.383 (2) | C13—H13 | 0.9500 |
C5—C6 | 1.389 (2) | C14—H14 | 0.9500 |
C7—C8 | 1.4725 (17) | C15—H15 | 0.9500 |
C8—C9 | 1.4853 (18) | C17—H17 | 0.9500 |
C9—C10 | 1.4927 (17) | C18—H18 | 0.9500 |
C10—C11 | 1.4012 (17) | C20—H20 | 0.9500 |
C10—C15 | 1.3892 (18) | C21—H21 | 0.9500 |
C11—C12 | 1.3826 (19) | C22—H22A | 0.9800 |
C12—C13 | 1.381 (2) | C22—H22B | 0.9800 |
C13—C14 | 1.3833 (19) | C22—H22C | 0.9800 |
C14—C15 | 1.3872 (19) | ||
C19—O3—C22 | 116.93 (10) | C18—C19—C20 | 119.50 (12) |
N2—N1—C8 | 121.26 (10) | C19—C20—C21 | 120.34 (12) |
N1—N2—C16 | 120.15 (10) | C16—C21—C20 | 120.04 (11) |
N1—N2—H1 | 119.9 (10) | C1—C2—H2 | 120.00 |
C16—N2—H1 | 119.7 (10) | C3—C2—H2 | 120.00 |
C2—C1—C6 | 119.63 (13) | C2—C3—H3 | 120.00 |
C2—C1—C7 | 118.74 (13) | C4—C3—H3 | 120.00 |
C6—C1—C7 | 121.55 (11) | C3—C4—H4 | 120.00 |
C1—C2—C3 | 120.37 (14) | C5—C4—H4 | 120.00 |
C2—C3—C4 | 119.68 (13) | C4—C5—H5 | 120.00 |
C3—C4—C5 | 120.28 (14) | C6—C5—H5 | 120.00 |
C4—C5—C6 | 120.25 (14) | C1—C6—H6 | 120.00 |
C1—C6—C5 | 119.74 (12) | C5—C6—H6 | 120.00 |
O2—C7—C8 | 120.42 (12) | C10—C11—H11 | 120.00 |
O2—C7—C1 | 119.64 (11) | C12—C11—H11 | 120.00 |
C1—C7—C8 | 119.80 (11) | C11—C12—H12 | 120.00 |
N1—C8—C9 | 114.35 (10) | C13—C12—H12 | 120.00 |
N1—C8—C7 | 124.47 (11) | C12—C13—H13 | 120.00 |
C7—C8—C9 | 120.47 (11) | C14—C13—H13 | 120.00 |
O1—C9—C10 | 120.72 (11) | C13—C14—H14 | 120.00 |
C8—C9—C10 | 120.27 (11) | C15—C14—H14 | 120.00 |
O1—C9—C8 | 118.95 (11) | C10—C15—H15 | 120.00 |
C11—C10—C15 | 119.45 (12) | C14—C15—H15 | 120.00 |
C9—C10—C11 | 117.85 (11) | C16—C17—H17 | 120.00 |
C9—C10—C15 | 122.66 (11) | C18—C17—H17 | 120.00 |
C10—C11—C12 | 119.89 (12) | C17—C18—H18 | 120.00 |
C11—C12—C13 | 120.29 (12) | C19—C18—H18 | 120.00 |
C12—C13—C14 | 120.13 (13) | C19—C20—H20 | 120.00 |
C13—C14—C15 | 120.15 (13) | C21—C20—H20 | 120.00 |
C10—C15—C14 | 120.06 (12) | C16—C21—H21 | 120.00 |
C17—C16—C21 | 119.89 (11) | C20—C21—H21 | 120.00 |
N2—C16—C17 | 121.54 (11) | O3—C22—H22A | 109.00 |
N2—C16—C21 | 118.56 (11) | O3—C22—H22B | 109.00 |
C16—C17—C18 | 119.91 (12) | O3—C22—H22C | 109.00 |
C17—C18—C19 | 120.30 (11) | H22A—C22—H22B | 110.00 |
O3—C19—C20 | 115.97 (11) | H22A—C22—H22C | 109.00 |
O3—C19—C18 | 124.52 (11) | H22B—C22—H22C | 109.00 |
C22—O3—C19—C18 | −4.76 (18) | C7—C8—C9—O1 | −30.36 (19) |
C22—O3—C19—C20 | 175.85 (11) | C7—C8—C9—C10 | 152.35 (12) |
C8—N1—N2—C16 | −177.67 (11) | O1—C9—C10—C11 | −24.5 (2) |
N2—N1—C8—C7 | 4.91 (19) | O1—C9—C10—C15 | 153.45 (14) |
N2—N1—C8—C9 | −165.34 (11) | C8—C9—C10—C11 | 152.71 (13) |
N1—N2—C16—C17 | 6.82 (18) | C8—C9—C10—C15 | −29.3 (2) |
N1—N2—C16—C21 | −172.50 (12) | C9—C10—C11—C12 | 178.39 (13) |
C6—C1—C2—C3 | 2.05 (18) | C15—C10—C11—C12 | 0.3 (2) |
C7—C1—C2—C3 | 178.65 (11) | C9—C10—C15—C14 | −177.10 (13) |
C2—C1—C6—C5 | 0.13 (18) | C11—C10—C15—C14 | 0.9 (2) |
C7—C1—C6—C5 | −176.37 (11) | C10—C11—C12—C13 | −1.5 (2) |
C2—C1—C7—O2 | −41.22 (17) | C11—C12—C13—C14 | 1.6 (2) |
C2—C1—C7—C8 | 143.16 (12) | C12—C13—C14—C15 | −0.4 (2) |
C6—C1—C7—O2 | 135.31 (13) | C13—C14—C15—C10 | −0.9 (2) |
C6—C1—C7—C8 | −40.31 (17) | N2—C16—C17—C18 | −178.94 (12) |
C1—C2—C3—C4 | −2.43 (19) | C21—C16—C17—C18 | 0.37 (19) |
C2—C3—C4—C5 | 0.6 (2) | N2—C16—C21—C20 | −179.88 (12) |
C3—C4—C5—C6 | 1.6 (2) | C17—C16—C21—C20 | 0.79 (19) |
C4—C5—C6—C1 | −1.95 (19) | C16—C17—C18—C19 | −1.03 (19) |
O2—C7—C8—N1 | −16.2 (2) | C17—C18—C19—O3 | −178.83 (12) |
O2—C7—C8—C9 | 153.45 (12) | C17—C18—C19—C20 | 0.53 (19) |
C1—C7—C8—N1 | 159.35 (12) | O3—C19—C20—C21 | −179.95 (12) |
C1—C7—C8—C9 | −30.96 (18) | C18—C19—C20—C21 | 0.6 (2) |
N1—C8—C9—O1 | 140.32 (13) | C19—C20—C21—C16 | −1.3 (2) |
N1—C8—C9—C10 | −36.97 (18) |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H1···O2 | 0.884 (14) | 1.977 (15) | 2.6427 (14) | 131.0 (14) |
C15—H15···O3i | 0.95 | 2.64 | 3.5859 (16) | 174 |
C21—H21···O1ii | 0.95 | 2.63 | 3.3441 (15) | 132 |
Symmetry codes: (i) −x+1, −y+1, −z+2; (ii) −x+1, −y, −z+2. |
Experimental details
Crystal data | |
Chemical formula | C22H18N2O3 |
Mr | 358.38 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 150 |
a, b, c (Å) | 12.3045 (11), 11.055 (1), 14.2435 (13) |
β (°) | 113.683 (1) |
V (Å3) | 1774.3 (3) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.52 × 0.26 × 0.15 |
Data collection | |
Diffractometer | Bruker D8 Discover diffractometer with SMART CCD area detector |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 10646, 3600, 2894 |
Rint | 0.036 |
(sin θ/λ)max (Å−1) | 0.625 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.039, 0.105, 1.04 |
No. of reflections | 3600 |
No. of parameters | 249 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.26, −0.18 |
Computer programs: SMART (Bruker, 2001), SAINT (Bruker, 2000), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), XP in SHELXTL-PC (Sheldrick, 2008), PLATON (Spek, 2009) and Mercury (Macrae et al., 2006).
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H1···O2 | 0.884 (14) | 1.977 (15) | 2.6427 (14) | 131.0 (14) |
C15—H15···O3i | 0.95 | 2.64 | 3.5859 (16) | 174 |
C21—H21···O1ii | 0.95 | 2.63 | 3.3441 (15) | 132 |
Symmetry codes: (i) −x+1, −y+1, −z+2; (ii) −x+1, −y, −z+2. |
Acknowledgements
The authors thank the Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT; grant Nos. 11100446 and 1080269) and the Universidad Andrés Bello (grant No. DI-06–10-R) for financial assistance.
References
Bertolasi, V., Ferretti, V., Gilli, P., Gilli, G., Issa, Y. M. & Sherif, O. E. (1993). J. Chem. Soc. Perkin Trans. 2, pp. 2223–2228. CSD CrossRef Web of Science Google Scholar
Bruker (2000). SAINT. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Bruker (2001). SMART. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Bustos, C., Alvarez-Thon, L., Barría, D., Garland, M. T. & Sánchez, C. (2011). Acta Cryst. E67, o1587. Web of Science CSD CrossRef IUCr Journals Google Scholar
Bustos, C., Alvarez-Thon, L., Cárcamo, J.-G., Garland, M. T. & Sánchez, C. (2011). Acta Cryst. E67, o1426. Web of Science CSD CrossRef IUCr Journals Google Scholar
Bustos, C., Alvarez-Thon, L., Cárcamo, J.-G., Ibañez, A. & Sánchez, C. (2011). Acta Cryst. E67, o1450–o1451. Web of Science CSD CrossRef IUCr Journals Google Scholar
Gilli, G., Bertolasi, V., Ferretti, V. & Gilli, P. (1993). Acta Cryst. B49, 564–576. CrossRef CAS Web of Science IUCr Journals Google Scholar
Macrae, C. F., Edgington, P. R., McCabe, P., Pidcock, E., Shields, G. P., Taylor, R., Towler, M. & van de Streek, J. (2006). J. Appl. Cryst. 39, 453–457. Web of Science CrossRef CAS IUCr Journals Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Spek, A. L. (2009). Acta Cryst. D65, 148–155. Web of Science CrossRef CAS IUCr Journals Google Scholar
Yao, H. C. (1964). J. Org. Chem. 29, 2959–2962. CrossRef CAS Web of Science Google Scholar
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.
Extensive experimental and theoretical efforts have been devoted to understand the reasons for the formation of the very strong intramolecular O—H···O hydrogen bond in β-diketoenolic systems (Bertolasi et al., 1993). A model called RAHB (Resonance Assisted Hydrogen Bond) was suggested, which is essentially a synergistic mutual reinforcement of the H-bond with the π-delocalization within this heterodienic system (Gilli et al., 1993). Besides, this concept has been applied to other heterodienic systems such as enaminones and ketohydrazones. On the other hand, in previous works we have reported the crystal structures of three β-diketohydrazones of the type 2-(2-(R-phenyl)hydrazinylidene)-1,3-diphenylpropane-1,3-dione (R = 4-Br, 4-NO2, 3-Cl) that contain this type of hydrogen bond (Bustos, Alvarez-Thon, Barría et al., 2011; Bustos, Alvarez-Thon, Cárcamo, Garland & Sánchez, 2011; Bustos, Alvarez-Thon, Cárcamo, Ibañez & Sánchez, 2011. We now present the crystal structure of a second monoclinic polymorph of the compound C22H18N2O3 (I), described previously in the literature (Bertolasi et al., 1993), prepared using similar methodology (Yao, 1964) and recrystallizing from ethanol as orange crystals. The title compound crystallizes in space group P21/c whereas the previously reported structure (Bertolasi et al., 1993) crystallizes in space group P21. The most striking structural difference between the two polymorphs is in the methoxy group which appears rotated by 180°.
In the molecular structure of the title compound (Fig. 1), the interplanar angle between the benzoyl units is 80.04 (5)°. The corresponding angles between the phenylhydrazinylidene and the benzoyl groups are 36.11 (5) and 55.77 (2)°, respectively. In the crystal, a strong resonance-assisted intramolecular hydrogen bond, N2—H1···O2, is observed (Table 1).
The structure shows no conventional intermolecular hydrogen bonds and the entire supramolecular structure is constructed only by weak interactions. For the sake of clarity, the crystal packing can be described through the formation of two inversion-related dimers: firstly, a dimer is formed via weak intermolecular contacts of the type C15—H15···O3i, and a π-π stacking interaction with a Cg···Cgi distance of 3.6088 (8) Å, where Cg is the centroid of the C16—C21 ring (Fig. 2) [symmetry code: (i) -x + 1, -y + 1, -z + 2]. Secondly, a dimer is formed via weak contacts of the type C21—H21···O1ii [3.3441 (15) Å] (Fig. 3) [symmetry code: (ii) -x + 1, -y, -z + 2].