Literature DB >> 21580109

3-Acetyl-6-chloro-4-phenyl-quinolin-2(1H)-one.

J Kalyana Sundar, S Natarajan, S Sarveswari, V Vijayakumar, P L Nilantha Lakshman.   

Abstract

The title compound, C(17)H(12)ClNO(2), crystallizes with two mol-ecules in the asymmetric unit. The main conformational difference between these two mol-ecules is the dihedral angle between the phenyl ring and the quinoline ring system [70.5 (1)° and 65.5 (1) Å]. The crystal packing is stabilized by N-H⋯O hydrogen bonds.

Entities:  

Year:  2009        PMID: 21580109      PMCID: PMC2980191          DOI: 10.1107/S1600536809054087

Source DB:  PubMed          Journal:  Acta Crystallogr Sect E Struct Rep Online        ISSN: 1600-5368


Related literature

For general background, see: Cooper et al. (1992 ▶); Gaudio et al. (1994 ▶); Gordeev et al. (1996 ▶).

Experimental

Crystal data

C17H12ClNO2 M = 297.73 Monoclinic, a = 10.043 (5) Å b = 18.663 (9) Å c = 15.537 (7) Å β = 91.811 (5)° V = 2911 (2) Å3 Z = 8 Mo Kα radiation μ = 0.27 mm−1 T = 293 K 0.17 × 0.14 × 0.11 mm

Data collection

Nonius MACH-3 diffractometer Absorption correction: ψ scan (North et al., 1968 ▶) T min = 0.955, T max = 0.967 5771 measured reflections 5104 independent reflections 2567 reflections with I > 2σ(I) R int = 0.015 2 standard reflections every 60 min intensity decay: none

Refinement

R[F 2 > 2σ(F 2)] = 0.041 wR(F 2) = 0.123 S = 1.00 5104 reflections 389 parameters H atoms treated by a mixture of independent and constrained refinement Δρmax = 0.22 e Å−3 Δρmin = −0.18 e Å−3 Data collection: CAD-4 EXPRESS (Enraf–Nonius, 1994 ▶); cell refinement: CAD-4 EXPRESS; data reduction: XCAD4 (Harms & Wocadlo, 1996 ▶); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: PLATON (Spek, 2009 ▶); software used to prepare material for publication: SHELXL97. Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536809054087/bt5138sup1.cif Structure factors: contains datablocks I. DOI: 10.1107/S1600536809054087/bt5138Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report
C17H12ClNO2F(000) = 1232
Mr = 297.73Dx = 1.359 Mg m3
Monoclinic, P21/nMo Kα radiation, λ = 0.71069 Å
a = 10.043 (5) ÅCell parameters from 25 reflections
b = 18.663 (9) Åθ = 2–25°
c = 15.537 (7) ŵ = 0.27 mm1
β = 91.811 (5)°T = 293 K
V = 2911 (2) Å3Block, colourless
Z = 80.17 × 0.14 × 0.11 mm
Nonius MACH-3 diffractometer2567 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tubeRint = 0.015
graphiteθmax = 25.0°, θmin = 2.2°
ω–2θ scansh = 0→11
Absorption correction: ψ scan (North et al., 1968)k = −1→22
Tmin = 0.955, Tmax = 0.967l = −18→18
5771 measured reflections2 standard reflections every 60 min
5104 independent reflections intensity decay: none
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.041Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.123H atoms treated by a mixture of independent and constrained refinement
S = 1.00w = 1/[σ2(Fo2) + (0.0478P)2 + 0.722P] where P = (Fo2 + 2Fc2)/3
5104 reflections(Δ/σ)max < 0.001
389 parametersΔρmax = 0.22 e Å3
0 restraintsΔρmin = −0.18 e Å3
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.
xyzUiso*/Ueq
H10.316 (3)0.4766 (17)0.3548 (19)0.084 (10)*
H20.433 (3)0.4103 (15)0.4718 (18)0.073 (9)*
C20.2436 (3)0.38557 (15)0.48154 (18)0.0546 (7)
C30.1547 (3)0.34166 (14)0.53187 (16)0.0490 (7)
C40.2019 (3)0.29962 (14)0.59716 (16)0.0478 (7)
C50.3441 (3)0.29580 (14)0.61547 (17)0.0485 (7)
C60.4299 (3)0.33733 (14)0.56559 (17)0.0503 (7)
C70.5675 (3)0.33402 (16)0.5801 (2)0.0637 (8)
H70.62330.36150.54660.076*
C80.6211 (3)0.29074 (18)0.6431 (2)0.0702 (9)
H80.71290.28880.65280.084*
C90.5373 (3)0.24975 (17)0.69226 (19)0.0657 (9)
C100.4021 (3)0.25169 (16)0.67917 (18)0.0583 (8)
H100.34820.22340.71290.070*
C110.1106 (2)0.25720 (14)0.65164 (17)0.0474 (7)
C120.0419 (3)0.19869 (16)0.6198 (2)0.0678 (9)
H120.05090.18500.56280.081*
C13−0.0410 (3)0.16005 (18)0.6726 (3)0.0794 (10)
H13−0.08750.12060.65070.095*
C14−0.0545 (3)0.17966 (19)0.7567 (2)0.0748 (10)
H14−0.11020.15370.79190.090*
C150.0141 (3)0.23736 (19)0.7888 (2)0.0763 (10)
H150.00560.25050.84610.092*
C160.0953 (3)0.27593 (16)0.7369 (2)0.0666 (9)
H160.14090.31540.75930.080*
C170.0084 (3)0.34993 (18)0.51066 (19)0.0617 (8)
C18−0.0616 (4)0.4092 (2)0.5505 (3)0.1200 (16)
H18A−0.14580.41650.52090.180*
H18B−0.00900.45200.54710.180*
H18C−0.07610.39810.60980.180*
O30.20241 (19)0.42606 (11)0.42292 (13)0.0695 (6)
C220.5109 (3)0.48911 (15)0.33411 (18)0.0540 (7)
C230.6000 (3)0.51645 (14)0.26931 (17)0.0509 (7)
C240.5525 (3)0.55259 (14)0.19914 (17)0.0496 (7)
C250.4099 (3)0.56463 (15)0.18733 (17)0.0516 (7)
C260.3239 (3)0.53486 (14)0.24734 (18)0.0510 (7)
C270.1863 (3)0.54169 (16)0.2368 (2)0.0623 (8)
H270.13070.52040.27610.075*
C280.1325 (3)0.57966 (17)0.1688 (2)0.0680 (9)
H280.04060.58460.16180.082*
C290.2171 (3)0.61076 (17)0.11031 (19)0.0671 (9)
C300.3526 (3)0.60242 (17)0.11801 (19)0.0645 (8)
H300.40680.62210.07670.077*
C310.6424 (3)0.57753 (16)0.12980 (17)0.0527 (7)
C320.7112 (3)0.52777 (19)0.0823 (2)0.0745 (9)
H320.70180.47920.09380.089*
C330.7940 (4)0.5498 (2)0.0177 (2)0.0924 (12)
H330.84030.5160−0.01360.111*
C340.8076 (3)0.6212 (3)−0.0001 (2)0.0867 (12)
H340.86270.6358−0.04370.104*
C350.7409 (3)0.6706 (2)0.0460 (2)0.0774 (10)
H350.75100.71910.03420.093*
C360.6580 (3)0.64907 (17)0.11062 (19)0.0648 (8)
H360.61210.68330.14150.078*
C370.7460 (3)0.50148 (17)0.28466 (17)0.0565 (8)
C380.7913 (3)0.42529 (17)0.2902 (3)0.0913 (11)
H38A0.76610.40080.23790.137*
H38B0.75050.40230.33790.137*
H38C0.88640.42390.29830.137*
O40.5515 (2)0.45877 (11)0.40079 (13)0.0677 (6)
N10.3760 (2)0.38020 (13)0.50155 (15)0.0564 (6)
N20.3779 (3)0.49874 (13)0.31750 (15)0.0553 (6)
O1−0.0477 (3)0.30921 (15)0.46303 (19)0.1134 (9)
O20.8246 (2)0.55021 (12)0.28979 (15)0.0813 (7)
Cl10.60397 (9)0.19417 (7)0.77191 (7)0.1139 (4)
Cl20.15123 (9)0.65908 (6)0.02361 (6)0.0999 (4)
U11U22U33U12U13U23
C20.060 (2)0.0565 (19)0.0479 (17)−0.0054 (15)0.0101 (15)0.0036 (15)
C30.0520 (16)0.0511 (17)0.0443 (15)−0.0056 (14)0.0084 (13)0.0003 (14)
C40.0523 (17)0.0437 (16)0.0479 (16)−0.0037 (13)0.0105 (13)−0.0030 (13)
C50.0505 (17)0.0454 (16)0.0501 (16)−0.0034 (14)0.0107 (13)−0.0038 (14)
C60.0542 (18)0.0470 (16)0.0501 (17)−0.0045 (14)0.0089 (14)−0.0023 (14)
C70.0529 (19)0.069 (2)0.070 (2)−0.0135 (16)0.0154 (16)0.0013 (17)
C80.0497 (18)0.085 (2)0.076 (2)−0.0036 (18)0.0037 (16)0.007 (2)
C90.0530 (19)0.076 (2)0.069 (2)0.0034 (16)0.0095 (16)0.0154 (17)
C100.0526 (18)0.0593 (19)0.0640 (19)−0.0007 (15)0.0158 (15)0.0086 (16)
C110.0426 (15)0.0479 (17)0.0521 (17)0.0028 (13)0.0079 (13)0.0070 (14)
C120.068 (2)0.066 (2)0.069 (2)−0.0150 (18)−0.0003 (16)0.0054 (17)
C130.062 (2)0.071 (2)0.104 (3)−0.0253 (18)−0.008 (2)0.023 (2)
C140.0497 (19)0.079 (3)0.096 (3)0.0066 (18)0.0165 (18)0.040 (2)
C150.086 (2)0.070 (2)0.075 (2)0.005 (2)0.031 (2)0.0133 (19)
C160.075 (2)0.0580 (19)0.069 (2)−0.0048 (16)0.0233 (17)0.0036 (16)
C170.061 (2)0.070 (2)0.0540 (19)−0.0131 (18)0.0008 (16)0.0155 (17)
C180.062 (2)0.148 (4)0.150 (4)0.021 (2)0.007 (2)−0.056 (3)
O30.0667 (13)0.0785 (15)0.0636 (13)−0.0070 (11)0.0064 (11)0.0250 (12)
C220.065 (2)0.0456 (17)0.0517 (19)−0.0083 (15)0.0096 (15)0.0025 (14)
C230.0564 (18)0.0438 (16)0.0529 (17)−0.0061 (14)0.0064 (14)0.0009 (14)
C240.0512 (17)0.0461 (17)0.0520 (17)−0.0047 (13)0.0084 (14)−0.0015 (14)
C250.0525 (17)0.0527 (17)0.0503 (17)−0.0030 (14)0.0112 (14)0.0027 (14)
C260.0569 (18)0.0448 (16)0.0520 (17)−0.0033 (14)0.0137 (14)0.0016 (14)
C270.0556 (19)0.066 (2)0.066 (2)−0.0048 (16)0.0230 (16)0.0043 (17)
C280.0487 (18)0.078 (2)0.078 (2)0.0020 (17)0.0134 (17)0.0088 (19)
C290.055 (2)0.078 (2)0.069 (2)0.0055 (16)0.0119 (16)0.0189 (17)
C300.0538 (19)0.081 (2)0.0591 (19)−0.0009 (16)0.0145 (15)0.0191 (17)
C310.0457 (16)0.0646 (19)0.0481 (16)−0.0035 (15)0.0068 (13)0.0030 (15)
C320.071 (2)0.077 (2)0.076 (2)−0.0058 (18)0.0191 (19)−0.0045 (19)
C330.083 (3)0.122 (3)0.074 (2)0.002 (2)0.034 (2)−0.012 (2)
C340.057 (2)0.139 (4)0.064 (2)−0.012 (2)0.0140 (17)0.021 (2)
C350.061 (2)0.093 (3)0.079 (2)−0.0124 (19)0.0078 (18)0.029 (2)
C360.0572 (19)0.070 (2)0.068 (2)−0.0015 (16)0.0098 (16)0.0126 (17)
C370.0568 (19)0.058 (2)0.0544 (18)−0.0079 (16)0.0008 (14)0.0053 (15)
C380.072 (2)0.064 (2)0.138 (3)0.0064 (19)−0.001 (2)0.011 (2)
O40.0733 (14)0.0715 (14)0.0584 (13)−0.0113 (11)0.0020 (11)0.0184 (11)
N10.0574 (16)0.0558 (16)0.0566 (16)−0.0119 (13)0.0096 (13)0.0084 (13)
N20.0586 (17)0.0535 (15)0.0546 (15)−0.0056 (13)0.0168 (13)0.0062 (12)
O10.099 (2)0.107 (2)0.130 (2)−0.0089 (17)−0.0444 (17)−0.0113 (18)
O20.0640 (14)0.0715 (15)0.1075 (18)−0.0165 (12)−0.0092 (13)0.0025 (13)
Cl10.0605 (6)0.1552 (10)0.1260 (9)0.0132 (6)0.0028 (5)0.0715 (8)
Cl20.0609 (5)0.1354 (9)0.1034 (7)0.0066 (5)0.0018 (5)0.0541 (7)
C2—O31.244 (3)C22—N21.365 (4)
C2—N11.360 (4)C22—C231.460 (4)
C2—C31.457 (4)C23—C241.356 (4)
C3—C41.356 (3)C23—C371.504 (4)
C3—C171.504 (4)C24—C251.455 (4)
C4—C51.449 (4)C24—C311.501 (4)
C4—C111.494 (3)C25—C301.397 (4)
C5—C101.400 (4)C25—C261.405 (4)
C5—C61.410 (4)C26—N21.378 (3)
C6—N11.374 (3)C26—C271.393 (4)
C6—C71.395 (4)C27—C281.369 (4)
C7—C81.366 (4)C27—H270.9300
C7—H70.9300C28—C291.390 (4)
C8—C91.385 (4)C28—H280.9300
C8—H80.9300C29—C301.371 (4)
C9—C101.367 (4)C29—Cl21.735 (3)
C9—Cl11.733 (3)C30—H300.9300
C10—H100.9300C31—C361.378 (4)
C11—C121.375 (4)C31—C321.385 (4)
C11—C161.383 (4)C32—C331.385 (4)
C12—C131.389 (4)C32—H320.9300
C12—H120.9300C33—C341.368 (5)
C13—C141.368 (5)C33—H330.9300
C13—H130.9300C34—C351.358 (5)
C14—C151.364 (4)C34—H340.9300
C14—H140.9300C35—C361.384 (4)
C15—C161.370 (4)C35—H350.9300
C15—H150.9300C36—H360.9300
C16—H160.9300C37—O21.206 (3)
C17—O11.190 (3)C37—C381.495 (4)
C17—C181.459 (5)C38—H38A0.9600
C18—H18A0.9600C38—H38B0.9600
C18—H18B0.9600C38—H38C0.9600
C18—H18C0.9600N1—H20.93 (3)
C22—O41.238 (3)N2—H10.96 (3)
O3—C2—N1120.8 (3)C24—C23—C22121.4 (3)
O3—C2—C3122.6 (3)C24—C23—C37122.5 (2)
N1—C2—C3116.5 (3)C22—C23—C37116.2 (3)
C4—C3—C2121.4 (3)C23—C24—C25119.9 (2)
C4—C3—C17122.6 (2)C23—C24—C31121.8 (2)
C2—C3—C17115.8 (2)C25—C24—C31118.3 (2)
C3—C4—C5119.6 (2)C30—C25—C26117.7 (3)
C3—C4—C11121.6 (2)C30—C25—C24123.7 (2)
C5—C4—C11118.8 (2)C26—C25—C24118.6 (3)
C10—C5—C6117.6 (3)N2—C26—C27120.1 (2)
C10—C5—C4123.6 (2)N2—C26—C25118.9 (3)
C6—C5—C4118.7 (3)C27—C26—C25120.9 (3)
N1—C6—C7120.6 (3)C28—C27—C26120.3 (3)
N1—C6—C5119.0 (3)C28—C27—H27119.9
C7—C6—C5120.5 (3)C26—C27—H27119.9
C8—C7—C6120.5 (3)C27—C28—C29119.1 (3)
C8—C7—H7119.8C27—C28—H28120.5
C6—C7—H7119.8C29—C28—H28120.5
C7—C8—C9119.3 (3)C30—C29—C28121.4 (3)
C7—C8—H8120.3C30—C29—Cl2118.7 (2)
C9—C8—H8120.3C28—C29—Cl2119.9 (2)
C10—C9—C8121.4 (3)C29—C30—C25120.6 (3)
C10—C9—Cl1118.8 (2)C29—C30—H30119.7
C8—C9—Cl1119.8 (2)C25—C30—H30119.7
C9—C10—C5120.7 (3)C36—C31—C32118.2 (3)
C9—C10—H10119.7C36—C31—C24122.0 (3)
C5—C10—H10119.7C32—C31—C24119.8 (3)
C12—C11—C16118.4 (3)C31—C32—C33120.5 (3)
C12—C11—C4121.8 (3)C31—C32—H32119.7
C16—C11—C4119.8 (2)C33—C32—H32119.7
C11—C12—C13120.2 (3)C34—C33—C32120.1 (3)
C11—C12—H12119.9C34—C33—H33120.0
C13—C12—H12119.9C32—C33—H33120.0
C14—C13—C12120.3 (3)C35—C34—C33120.1 (3)
C14—C13—H13119.8C35—C34—H34120.0
C12—C13—H13119.8C33—C34—H34120.0
C15—C14—C13119.8 (3)C34—C35—C36120.2 (3)
C15—C14—H14120.1C34—C35—H35119.9
C13—C14—H14120.1C36—C35—H35119.9
C14—C15—C16120.2 (3)C31—C36—C35120.9 (3)
C14—C15—H15119.9C31—C36—H36119.6
C16—C15—H15119.9C35—C36—H36119.6
C15—C16—C11121.2 (3)O2—C37—C38121.1 (3)
C15—C16—H16119.4O2—C37—C23120.2 (3)
C11—C16—H16119.4C38—C37—C23118.7 (3)
O1—C17—C18121.5 (3)C37—C38—H38A109.5
O1—C17—C3120.7 (3)C37—C38—H38B109.5
C18—C17—C3117.7 (3)H38A—C38—H38B109.5
C17—C18—H18A109.5C37—C38—H38C109.5
C17—C18—H18B109.5H38A—C38—H38C109.5
H18A—C18—H18B109.5H38B—C38—H38C109.5
C17—C18—H18C109.5C2—N1—C6124.6 (2)
H18A—C18—H18C109.5C2—N1—H2116.8 (18)
H18B—C18—H18C109.5C6—N1—H2118.4 (18)
O4—C22—N2120.9 (2)C22—N2—C26124.9 (2)
O4—C22—C23123.0 (3)C22—N2—H1118.6 (18)
N2—C22—C23116.2 (3)C26—N2—H1116.4 (18)
O3—C2—C3—C4−178.0 (3)C22—C23—C24—C25−0.1 (4)
N1—C2—C3—C42.2 (4)C37—C23—C24—C25179.2 (3)
O3—C2—C3—C17−1.9 (4)C22—C23—C24—C31−176.7 (2)
N1—C2—C3—C17178.2 (3)C37—C23—C24—C312.6 (4)
C2—C3—C4—C5−2.5 (4)C23—C24—C25—C30178.7 (3)
C17—C3—C4—C5−178.2 (3)C31—C24—C25—C30−4.6 (4)
C2—C3—C4—C11177.0 (2)C23—C24—C25—C26−3.3 (4)
C17—C3—C4—C111.3 (4)C31—C24—C25—C26173.4 (2)
C3—C4—C5—C10−177.3 (3)C30—C25—C26—N2−178.5 (2)
C11—C4—C5—C103.2 (4)C24—C25—C26—N23.4 (4)
C3—C4—C5—C61.3 (4)C30—C25—C26—C271.3 (4)
C11—C4—C5—C6−178.3 (2)C24—C25—C26—C27−176.8 (3)
C10—C5—C6—N1178.9 (2)N2—C26—C27—C28177.7 (3)
C4—C5—C6—N10.2 (4)C25—C26—C27—C28−2.0 (4)
C10—C5—C6—C7−0.1 (4)C26—C27—C28—C290.4 (5)
C4—C5—C6—C7−178.7 (2)C27—C28—C29—C301.9 (5)
N1—C6—C7—C8−179.2 (3)C27—C28—C29—Cl2180.0 (2)
C5—C6—C7—C8−0.3 (4)C28—C29—C30—C25−2.7 (5)
C6—C7—C8—C90.4 (5)Cl2—C29—C30—C25179.3 (2)
C7—C8—C9—C100.0 (5)C26—C25—C30—C291.0 (4)
C7—C8—C9—Cl1179.6 (2)C24—C25—C30—C29179.0 (3)
C8—C9—C10—C5−0.3 (5)C23—C24—C31—C36−117.9 (3)
Cl1—C9—C10—C5−180.0 (2)C25—C24—C31—C3665.5 (4)
C6—C5—C10—C90.4 (4)C23—C24—C31—C3263.0 (4)
C4—C5—C10—C9178.9 (3)C25—C24—C31—C32−113.7 (3)
C3—C4—C11—C1270.2 (4)C36—C31—C32—C330.4 (5)
C5—C4—C11—C12−110.3 (3)C24—C31—C32—C33179.6 (3)
C3—C4—C11—C16−110.8 (3)C31—C32—C33—C34−0.5 (5)
C5—C4—C11—C1668.7 (3)C32—C33—C34—C350.5 (6)
C16—C11—C12—C130.3 (4)C33—C34—C35—C36−0.6 (5)
C4—C11—C12—C13179.3 (3)C32—C31—C36—C35−0.5 (4)
C11—C12—C13—C14−0.3 (5)C24—C31—C36—C35−179.6 (3)
C12—C13—C14—C15−0.2 (5)C34—C35—C36—C310.5 (5)
C13—C14—C15—C160.6 (5)C24—C23—C37—O258.7 (4)
C14—C15—C16—C11−0.6 (5)C22—C23—C37—O2−122.0 (3)
C12—C11—C16—C150.2 (4)C24—C23—C37—C38−119.2 (3)
C4—C11—C16—C15−178.9 (3)C22—C23—C37—C3860.2 (4)
C4—C3—C17—O1−87.4 (4)O3—C2—N1—C6179.5 (3)
C2—C3—C17—O196.6 (4)C3—C2—N1—C6−0.7 (4)
C4—C3—C17—C1892.4 (4)C7—C6—N1—C2178.4 (3)
C2—C3—C17—C18−83.5 (4)C5—C6—N1—C2−0.5 (4)
O4—C22—C23—C24−176.6 (3)O4—C22—N2—C26176.7 (3)
N2—C22—C23—C243.4 (4)C23—C22—N2—C26−3.3 (4)
O4—C22—C23—C374.0 (4)C27—C26—N2—C22−179.8 (3)
N2—C22—C23—C37−176.0 (2)C25—C26—N2—C220.0 (4)
D—H···AD—HH···AD···AD—H···A
N1—H2···O40.93 (3)1.88 (3)2.807 (3)171 (3)
N2—H1···O30.96 (3)1.84 (3)2.795 (4)175 (3)
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯AD—HH⋯ADAD—H⋯A
N1—H2⋯O40.93 (3)1.88 (3)2.807 (3)171 (3)
N2—H1⋯O30.96 (3)1.84 (3)2.795 (4)175 (3)
  4 in total

1.  A short history of SHELX.

Authors:  George M Sheldrick
Journal:  Acta Crystallogr A       Date:  2007-12-21       Impact factor: 2.290

2.  Quantitative structure-activity relationships for 1,4-dihydropyridine calcium channel antagonists (nifedipine analogues): a quantum chemical/classical approach.

Authors:  A C Gaudio; A Korolkovas; Y Takahata
Journal:  J Pharm Sci       Date:  1994-08       Impact factor: 3.534

3.  1,4-Dihydropyridines as antagonists of platelet activating factor. 1. Synthesis and structure-activity relationships of 2-(4-heterocyclyl)phenyl derivatives.

Authors:  K Cooper; M J Fray; M J Parry; K Richardson; J Steele
Journal:  J Med Chem       Date:  1992-08-21       Impact factor: 7.446

4.  Structure validation in chemical crystallography.

Authors:  Anthony L Spek
Journal:  Acta Crystallogr D Biol Crystallogr       Date:  2009-01-20
  4 in total

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