Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536807031443/wn2161sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536807031443/wn2161Isup2.hkl |
CCDC reference: 657656
To the Vilsmeier-Haack complex (3.22 g), prepared from DMF (20 ml) and POCl3 (3.64 g, 0.021 mol) at 273–278 K was added 1-phenylethanone- (5-bromopyrimidin-2-yl)hydrazone (2.2 g, 0.007 mol). The reaction mixture was stirred at 333–343 K for 4 h, and monitored by TLC. The contents were cooled, poured into ice cold water and neutralized with sodium carbonate. The product that separated was filtered and recrystallized from ethyl acetate to give yellow crystals (1.7 g, 71%).
H atoms were positioned geometrically and allowed to ride on their parent atoms, with C—H = 0.95Å and Uiso = 1.2Ueq(C). The maximum residual electron density peak is located 1.53 Å from H35.
A literature survey shows that a large number of simple, N-bridged, nitrogen- and sulfur-containing heterocyclic compounds, containing the pyrimidine unit, are associated with diverse biological activities (Wichmann et al., 1999; El-Bendary et al., 1998; Kirpal, 1999; Tsuji & Ishikawa, 1994). Pyrazoles constitute an important class of heterocycles, which display interesting biological properties such as fungicidal, anti-inflammatory, anti-arthritic, antidepressant and antiviral activity. Many pyrazolines also find utility as polymer intermediates in industry (Mohan et al., 1989; Baraldi et al., 1996; Baraldi et al., 2003; Sanjay et al., 2006).
In the title compound, Fig. 1, C14H9BrN4O, the molecule is planar, lying on a mirror plane (Fig. 3). The molecules are linked by C—H···N hydrogen bonds; intramolecular C—H···N and C—H···O hydrogen bonds are also present. Furthermore, there is a short intermolecular contact between Br1 and O41ii [2.869 (5) Å; symmetry code: (ii) x, y, z - 1]. Recently a similar structure, 3-(4-chlorophenyl)-1- (4,6-dimethylpyrimidin-2-yl)-1H-pyrazole-4-carbaldehyde, has been published (Thiruvalluvar et al., 2007); however, it is not planar.
For related literature, see: Wichmann et al. (1999); El-Bendary et al. (1998); Kirpal (1999); Tsuji & Ishikawa (1994); Mohan et al. (1989); Baraldi et al. (1996, 2003); Sanjay et al., (2006); Thiruvalluvar et al. (2007).
Data collection: COLLECT (Nonius, 2000); cell refinement: DENZO–SMN (Otwinowski & Minor, 1997); data reduction: DENZO–SMN and SCALEPACK (Otwinowski & Minor, 1997); program(s) used to solve structure: DIRDIF99 (Beurskens et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: PLATON (Spek, 2003).
C14H9BrN4O | F(000) = 656 |
Mr = 329.15 | Dx = 1.688 Mg m−3 |
Monoclinic, C2/m | Melting point: 444(1) K |
Hall symbol: -C 2y | Mo Kα radiation, λ = 0.71073 Å |
a = 15.1590 (3) Å | Cell parameters from 12482 reflections |
b = 6.4761 (2) Å | θ = 2.0–30.0° |
c = 13.1979 (3) Å | µ = 3.17 mm−1 |
β = 90.584 (2)° | T = 160 K |
V = 1295.59 (6) Å3 | Block, light_brown |
Z = 4 | 0.25 × 0.25 × 0.15 mm |
Nonius KappaCCD area-detector diffractometer | 2049 independent reflections |
Radiation source: Nonius FR590 sealed tube generator | 1780 reflections with I > 2σ(I) |
Horizontally mounted graphite crystal monochromator | Rint = 0.089 |
Detector resolution: 9 pixels mm-1 | θmax = 30.0°, θmin = 2.7° |
φ and ω scans with κ offsets | h = −21→20 |
Absorption correction: multi-scan (Blessing, 1995) | k = −9→9 |
Tmin = 0.433, Tmax = 0.628 | l = −18→18 |
17133 measured reflections |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.086 | H-atom parameters constrained |
wR(F2) = 0.238 | w = 1/[σ2(Fo2) + (0.1474P)2 + 3.886P] where P = (Fo2 + 2Fc2)/3 |
S = 1.14 | (Δ/σ)max < 0.001 |
2049 reflections | Δρmax = 1.63 e Å−3 |
122 parameters | Δρmin = −0.83 e Å−3 |
0 restraints | Extinction correction: SHELXL97, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.108 (11) |
C14H9BrN4O | V = 1295.59 (6) Å3 |
Mr = 329.15 | Z = 4 |
Monoclinic, C2/m | Mo Kα radiation |
a = 15.1590 (3) Å | µ = 3.17 mm−1 |
b = 6.4761 (2) Å | T = 160 K |
c = 13.1979 (3) Å | 0.25 × 0.25 × 0.15 mm |
β = 90.584 (2)° |
Nonius KappaCCD area-detector diffractometer | 2049 independent reflections |
Absorption correction: multi-scan (Blessing, 1995) | 1780 reflections with I > 2σ(I) |
Tmin = 0.433, Tmax = 0.628 | Rint = 0.089 |
17133 measured reflections |
R[F2 > 2σ(F2)] = 0.086 | 0 restraints |
wR(F2) = 0.238 | H-atom parameters constrained |
S = 1.14 | Δρmax = 1.63 e Å−3 |
2049 reflections | Δρmin = −0.83 e Å−3 |
122 parameters |
Experimental. Solvent used: Ethyl Acetate Cooling Device: Oxford Cryosystems Cryostream 700 Crystal mount: glued on a glass fibre Mosaicity (°.): 0.558 (2) Frames collected: 369 Seconds exposure per frame: 60 Degrees rotation per frame: 2.0 Crystal-Detector distance (mm): 30.0 |
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 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 | ||
Br1 | 0.15553 (4) | 0.00000 | −0.50849 (4) | 0.0521 (3) | |
O41 | 0.1309 (3) | 0.00000 | 0.2757 (4) | 0.0564 (16) | |
N1 | 0.2038 (3) | 0.00000 | −0.0627 (4) | 0.0334 (11) | |
N2 | 0.2841 (3) | 0.00000 | −0.0148 (4) | 0.0346 (11) | |
N11 | 0.1114 (3) | 0.00000 | −0.2023 (4) | 0.0360 (12) | |
N13 | 0.2685 (3) | 0.00000 | −0.2227 (4) | 0.0414 (14) | |
C3 | 0.2666 (3) | 0.00000 | 0.0824 (4) | 0.0330 (12) | |
C4 | 0.1719 (4) | 0.00000 | 0.1001 (4) | 0.0360 (14) | |
C5 | 0.1368 (4) | 0.00000 | 0.0038 (4) | 0.0373 (14) | |
C12 | 0.1947 (3) | 0.00000 | −0.1698 (4) | 0.0337 (14) | |
C14 | 0.2553 (4) | 0.00000 | −0.3235 (5) | 0.0433 (19) | |
C15 | 0.1725 (4) | 0.00000 | −0.3662 (4) | 0.0396 (16) | |
C16 | 0.1008 (4) | 0.00000 | −0.3018 (4) | 0.0397 (14) | |
C31 | 0.3420 (3) | 0.00000 | 0.1551 (4) | 0.0333 (12) | |
C32 | 0.4289 (4) | 0.00000 | 0.1154 (5) | 0.0407 (16) | |
C33 | 0.5010 (4) | 0.00000 | 0.1799 (6) | 0.0457 (18) | |
C34 | 0.4886 (4) | 0.00000 | 0.2839 (6) | 0.050 (2) | |
C35 | 0.4060 (4) | 0.00000 | 0.3233 (5) | 0.0437 (17) | |
C36 | 0.3306 (4) | 0.00000 | 0.2595 (4) | 0.0387 (14) | |
C41 | 0.1129 (4) | 0.00000 | 0.1855 (4) | 0.0437 (18) | |
H5 | 0.07575 | 0.00000 | −0.01311 | 0.0445* | |
H14 | 0.30503 | 0.00000 | −0.36665 | 0.0522* | |
H16 | 0.04286 | 0.00000 | −0.32985 | 0.0476* | |
H32 | 0.43727 | 0.00000 | 0.04417 | 0.0487* | |
H33 | 0.55897 | 0.00000 | 0.15320 | 0.0550* | |
H34 | 0.53843 | 0.00000 | 0.32818 | 0.0597* | |
H35 | 0.39894 | 0.00000 | 0.39471 | 0.0525* | |
H36 | 0.27306 | 0.00000 | 0.28748 | 0.0465* | |
H41 | 0.05171 | 0.00000 | 0.16904 | 0.0521* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Br1 | 0.0463 (5) | 0.0828 (7) | 0.0272 (4) | 0.0000 | −0.0017 (2) | 0.0000 |
O41 | 0.038 (2) | 0.101 (4) | 0.030 (2) | 0.0000 | −0.0030 (16) | 0.0000 |
N1 | 0.0271 (19) | 0.043 (2) | 0.030 (2) | 0.0000 | −0.0009 (15) | 0.0000 |
N2 | 0.0256 (18) | 0.051 (2) | 0.027 (2) | 0.0000 | −0.0044 (15) | 0.0000 |
N11 | 0.031 (2) | 0.050 (2) | 0.027 (2) | 0.0000 | −0.0002 (16) | 0.0000 |
N13 | 0.028 (2) | 0.067 (3) | 0.029 (2) | 0.0000 | −0.0018 (16) | 0.0000 |
C3 | 0.030 (2) | 0.039 (2) | 0.030 (2) | 0.0000 | −0.0008 (17) | 0.0000 |
C4 | 0.032 (2) | 0.051 (3) | 0.025 (2) | 0.0000 | −0.0023 (17) | 0.0000 |
C5 | 0.028 (2) | 0.054 (3) | 0.030 (2) | 0.0000 | −0.0014 (18) | 0.0000 |
C12 | 0.026 (2) | 0.039 (2) | 0.036 (3) | 0.0000 | −0.0010 (18) | 0.0000 |
C14 | 0.036 (3) | 0.064 (4) | 0.030 (3) | 0.0000 | 0.005 (2) | 0.0000 |
C15 | 0.042 (3) | 0.060 (3) | 0.017 (2) | 0.0000 | 0.0040 (18) | 0.0000 |
C16 | 0.035 (2) | 0.054 (3) | 0.030 (2) | 0.0000 | −0.0027 (19) | 0.0000 |
C31 | 0.028 (2) | 0.041 (2) | 0.031 (2) | 0.0000 | −0.0005 (17) | 0.0000 |
C32 | 0.030 (2) | 0.055 (3) | 0.037 (3) | 0.0000 | 0.001 (2) | 0.0000 |
C33 | 0.031 (2) | 0.062 (4) | 0.044 (3) | 0.0000 | −0.009 (2) | 0.0000 |
C34 | 0.032 (3) | 0.067 (4) | 0.051 (4) | 0.0000 | −0.014 (2) | 0.0000 |
C35 | 0.042 (3) | 0.057 (3) | 0.032 (3) | 0.0000 | −0.002 (2) | 0.0000 |
C36 | 0.037 (2) | 0.051 (3) | 0.028 (2) | 0.0000 | −0.0037 (19) | 0.0000 |
C41 | 0.030 (2) | 0.072 (4) | 0.029 (3) | 0.0000 | 0.0022 (19) | 0.0000 |
Br1—C15 | 1.893 (5) | C31—C32 | 1.423 (8) |
O41—C41 | 1.219 (7) | C31—C36 | 1.390 (7) |
N1—N2 | 1.366 (7) | C32—C33 | 1.379 (9) |
N1—C5 | 1.349 (8) | C33—C34 | 1.387 (11) |
N1—C12 | 1.419 (7) | C34—C35 | 1.361 (9) |
N2—C3 | 1.313 (7) | C35—C36 | 1.413 (9) |
N11—C12 | 1.330 (7) | C5—H5 | 0.9500 |
N11—C16 | 1.321 (7) | C14—H14 | 0.9500 |
N13—C12 | 1.325 (7) | C16—H16 | 0.9500 |
N13—C14 | 1.343 (8) | C32—H32 | 0.9500 |
C3—C4 | 1.457 (8) | C33—H33 | 0.9500 |
C3—C31 | 1.485 (7) | C34—H34 | 0.9500 |
C4—C5 | 1.373 (8) | C35—H35 | 0.9500 |
C4—C41 | 1.446 (8) | C36—H36 | 0.9500 |
C14—C15 | 1.371 (9) | C41—H41 | 0.9500 |
C15—C16 | 1.387 (8) | ||
Br1···O41i | 2.869 (5) | C31···N11x | 3.3709 (19) |
Br1···O41ii | 2.869 (5) | C31···N11vii | 3.3709 (19) |
Br1···H36i | 3.2400 | C31···C12x | 3.2916 (12) |
Br1···H36ii | 3.2400 | C31···N11viii | 3.3709 (19) |
O41···Br1iii | 2.869 (5) | C31···C12viii | 3.2916 (12) |
O41···C36 | 3.037 (8) | C31···N11ix | 3.3709 (19) |
O41···Br1iv | 2.869 (5) | C31···C12ix | 3.2916 (12) |
O41···H16v | 2.7400 | C34···C16ix | 3.519 (3) |
O41···H16vi | 2.7400 | C34···C16viii | 3.519 (3) |
O41···H36 | 2.1600 | C34···C16vii | 3.519 (3) |
N1···C3vii | 3.2797 (11) | C34···C16x | 3.519 (3) |
N1···C3viii | 3.2797 (11) | C35···C15ix | 3.498 (3) |
N1···C3ix | 3.2797 (11) | C35···C16x | 3.2520 (8) |
N1···C3x | 3.2797 (11) | C35···C15viii | 3.498 (3) |
N2···N13 | 2.752 (7) | C35···C16vii | 3.2520 (8) |
N2···C3ix | 3.444 (2) | C35···C15vii | 3.498 (3) |
N2···C3vii | 3.444 (2) | C35···C15x | 3.498 (3) |
N2···C3viii | 3.444 (2) | C35···C16viii | 3.2520 (8) |
N2···C3x | 3.444 (2) | C35···C16ix | 3.2520 (8) |
N11···C31x | 3.3709 (19) | C36···C15ix | 3.532 (3) |
N11···C36vii | 3.441 (3) | C36···C14x | 3.594 (4) |
N11···C41v | 3.410 (8) | C36···C16viii | 3.445 (3) |
N11···C31ix | 3.3709 (19) | C36···C15viii | 3.532 (3) |
N11···C41vi | 3.410 (8) | C36···O41 | 3.037 (8) |
N11···C36ix | 3.441 (3) | C36···C12x | 3.468 (3) |
N11···C31vii | 3.3709 (19) | C36···C41 | 3.432 (8) |
N11···C31viii | 3.3709 (19) | C36···N11vii | 3.441 (3) |
N11···C36viii | 3.441 (3) | C36···N11viii | 3.441 (3) |
N11···C36x | 3.441 (3) | C36···C12vii | 3.468 (3) |
N13···N2 | 2.752 (7) | C36···C12viii | 3.468 (3) |
N2···H32 | 2.4400 | C36···C14vii | 3.594 (4) |
N11···H41vi | 2.5200 | C36···C14viii | 3.594 (4) |
N11···H41v | 2.5200 | C36···C15vii | 3.532 (3) |
N11···H5 | 2.5600 | C36···C14ix | 3.594 (4) |
N13···H33xi | 2.7600 | C36···C16vii | 3.445 (3) |
N13···H33xii | 2.7600 | C36···C12ix | 3.468 (3) |
C3···N1vii | 3.2797 (11) | C36···N11ix | 3.441 (3) |
C3···N1viii | 3.2797 (11) | C36···N11x | 3.441 (3) |
C3···N2vii | 3.444 (2) | C36···C16ix | 3.445 (3) |
C3···N2viii | 3.444 (2) | C36···C16x | 3.445 (3) |
C3···C12vii | 3.485 (3) | C36···C15x | 3.532 (3) |
C3···C12viii | 3.485 (3) | C41···C16vi | 3.599 (8) |
C3···N1ix | 3.2797 (11) | C41···C36 | 3.432 (8) |
C3···N1x | 3.2797 (11) | C41···C16v | 3.599 (8) |
C3···N2ix | 3.444 (2) | C41···N11v | 3.410 (8) |
C3···N2x | 3.444 (2) | C41···N11vi | 3.410 (8) |
C3···C12ix | 3.485 (3) | C4···H36 | 2.9000 |
C3···C12x | 3.485 (3) | C16···H41v | 2.9200 |
C12···C3ix | 3.485 (3) | C16···H41vi | 2.9200 |
C12···C3vii | 3.485 (3) | C32···H32xi | 2.9400 |
C12···C3viii | 3.485 (3) | C32···H32xii | 2.9400 |
C12···C31vii | 3.2916 (12) | C41···H36 | 2.7600 |
C12···C31viii | 3.2916 (12) | C41···H16v | 3.0500 |
C12···C36vii | 3.468 (3) | C41···H16vi | 3.0500 |
C12···C36viii | 3.468 (3) | H5···N11 | 2.5600 |
C12···C31x | 3.2916 (12) | H5···H41 | 2.4400 |
C12···C3x | 3.485 (3) | H5···H5v | 2.3300 |
C12···C31ix | 3.2916 (12) | H5···H5vi | 2.3300 |
C12···C36ix | 3.468 (3) | H14···H34xi | 2.4200 |
C12···C36x | 3.468 (3) | H14···H34xii | 2.4200 |
C14···C36ix | 3.594 (4) | H16···O41v | 2.7400 |
C14···C36vii | 3.594 (4) | H16···C41v | 3.0500 |
C14···C36viii | 3.594 (4) | H16···H41v | 2.5700 |
C14···C36x | 3.594 (4) | H16···O41vi | 2.7400 |
C15···C35x | 3.498 (3) | H16···C41vi | 3.0500 |
C15···C35vii | 3.498 (3) | H16···H41vi | 2.5700 |
C15···C35viii | 3.498 (3) | H32···N2 | 2.4400 |
C15···C36vii | 3.532 (3) | H32···C32xi | 2.9400 |
C15···C36viii | 3.532 (3) | H32···H32xi | 2.2400 |
C15···C35ix | 3.498 (3) | H32···C32xii | 2.9400 |
C15···C36ix | 3.532 (3) | H32···H32xii | 2.2400 |
C15···C36x | 3.532 (3) | H33···N13xi | 2.7600 |
C16···C35vii | 3.2520 (8) | H33···N13xii | 2.7600 |
C16···C41v | 3.599 (8) | H34···H14xi | 2.4200 |
C16···C36vii | 3.445 (3) | H34···H14xii | 2.4200 |
C16···C41vi | 3.599 (8) | H36···Br1iii | 3.2400 |
C16···C34ix | 3.519 (3) | H36···O41 | 2.1600 |
C16···C34vii | 3.519 (3) | H36···C4 | 2.9000 |
C16···C34viii | 3.519 (3) | H36···C41 | 2.7600 |
C16···C35x | 3.2520 (8) | H36···Br1iv | 3.2400 |
C16···C35viii | 3.2520 (8) | H41···H5 | 2.4400 |
C16···C36x | 3.445 (3) | H41···N11v | 2.5200 |
C16···C36viii | 3.445 (3) | H41···C16v | 2.9200 |
C16···C34x | 3.519 (3) | H41···H16v | 2.5700 |
C16···C35ix | 3.2520 (8) | H41···N11vi | 2.5200 |
C16···C36ix | 3.445 (3) | H41···C16vi | 2.9200 |
C31···C12vii | 3.2916 (12) | H41···H16vi | 2.5700 |
N2—N1—C5 | 111.9 (5) | C31—C32—C33 | 120.3 (6) |
N2—N1—C12 | 122.6 (4) | C32—C33—C34 | 119.8 (6) |
C5—N1—C12 | 125.6 (5) | C33—C34—C35 | 120.8 (6) |
N1—N2—C3 | 105.3 (4) | C34—C35—C36 | 121.0 (6) |
C12—N11—C16 | 115.2 (5) | C31—C36—C35 | 118.9 (5) |
C12—N13—C14 | 113.8 (5) | O41—C41—C4 | 128.9 (6) |
N2—C3—C4 | 111.5 (4) | N1—C5—H5 | 126.00 |
N2—C3—C31 | 118.0 (4) | C4—C5—H5 | 126.00 |
C4—C3—C31 | 130.5 (5) | N13—C14—H14 | 119.00 |
C3—C4—C5 | 103.0 (5) | C15—C14—H14 | 119.00 |
C3—C4—C41 | 138.0 (5) | N11—C16—H16 | 119.00 |
C5—C4—C41 | 119.0 (5) | C15—C16—H16 | 119.00 |
N1—C5—C4 | 108.4 (5) | C31—C32—H32 | 120.00 |
N1—C12—N11 | 113.8 (4) | C33—C32—H32 | 120.00 |
N1—C12—N13 | 116.8 (4) | C32—C33—H33 | 120.00 |
N11—C12—N13 | 129.4 (5) | C34—C33—H33 | 120.00 |
N13—C14—C15 | 122.3 (6) | C33—C34—H34 | 120.00 |
Br1—C15—C14 | 121.5 (5) | C35—C34—H34 | 120.00 |
Br1—C15—C16 | 120.6 (4) | C34—C35—H35 | 120.00 |
C14—C15—C16 | 117.9 (5) | C36—C35—H35 | 120.00 |
N11—C16—C15 | 121.4 (5) | C31—C36—H36 | 121.00 |
C3—C31—C32 | 118.1 (5) | C35—C36—H36 | 121.00 |
C3—C31—C36 | 122.5 (5) | O41—C41—H41 | 116.00 |
C32—C31—C36 | 119.3 (5) | C4—C41—H41 | 116.00 |
C5—N1—N2—C3 | 0.00 (1) | N2—C3—C31—C32 | 0.00 (1) |
C12—N1—N2—C3 | 180.00 (1) | N2—C3—C31—C36 | −180.00 (1) |
N2—N1—C5—C4 | 0.00 (1) | C4—C3—C31—C32 | 180.00 (1) |
C12—N1—C5—C4 | 180.00 (1) | C4—C3—C31—C36 | 0.00 (1) |
N2—N1—C12—N11 | −180.00 (1) | C3—C4—C5—N1 | 0.00 (1) |
N2—N1—C12—N13 | 0.00 (1) | C41—C4—C5—N1 | 180.00 (1) |
C5—N1—C12—N11 | 0.00 (1) | C3—C4—C41—O41 | 0.00 (1) |
C5—N1—C12—N13 | 180.00 (1) | C5—C4—C41—O41 | −180.00 (1) |
N1—N2—C3—C4 | 0.00 (1) | N13—C14—C15—Br1 | 180.00 (1) |
N1—N2—C3—C31 | −180.00 (1) | N13—C14—C15—C16 | 0.00 (1) |
C16—N11—C12—N1 | −180.00 (1) | Br1—C15—C16—N11 | −180.00 (1) |
C16—N11—C12—N13 | 0.00 (1) | C14—C15—C16—N11 | 0.00 (1) |
C12—N11—C16—C15 | 0.00 (1) | C3—C31—C32—C33 | −180.00 (1) |
C14—N13—C12—N1 | 180.00 (1) | C36—C31—C32—C33 | 0.00 (1) |
C14—N13—C12—N11 | 0.00 (1) | C3—C31—C36—C35 | −180.00 (1) |
C12—N13—C14—C15 | 0.00 (1) | C32—C31—C36—C35 | 0.00 (1) |
N2—C3—C4—C5 | 0.00 (1) | C31—C32—C33—C34 | 0.00 (1) |
N2—C3—C4—C41 | −180.00 (1) | C32—C33—C34—C35 | 0.00 (1) |
C31—C3—C4—C5 | 180.00 (1) | C33—C34—C35—C36 | 0.00 (1) |
C31—C3—C4—C41 | 0.00 (1) | C34—C35—C36—C31 | 0.00 (1) |
Symmetry codes: (i) x, y, z−1; (ii) x, −y, z−1; (iii) x, y, z+1; (iv) x, −y, z+1; (v) −x, y, −z; (vi) −x, −y, −z; (vii) −x+1/2, y−1/2, −z; (viii) −x+1/2, y+1/2, −z; (ix) −x+1/2, −y−1/2, −z; (x) −x+1/2, −y+1/2, −z; (xi) −x+1, y, −z; (xii) −x+1, −y, −z. |
D—H···A | D—H | H···A | D···A | D—H···A |
C32—H32···N2 | 0.95 | 2.44 | 2.774 | 100 |
C36—H36···O41 | 0.95 | 2.16 | 3.037 | 153 |
C41—H41···N11v | 0.95 | 2.52 | 3.410 | 157 |
Symmetry code: (v) −x, y, −z. |
Experimental details
Crystal data | |
Chemical formula | C14H9BrN4O |
Mr | 329.15 |
Crystal system, space group | Monoclinic, C2/m |
Temperature (K) | 160 |
a, b, c (Å) | 15.1590 (3), 6.4761 (2), 13.1979 (3) |
β (°) | 90.584 (2) |
V (Å3) | 1295.59 (6) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 3.17 |
Crystal size (mm) | 0.25 × 0.25 × 0.15 |
Data collection | |
Diffractometer | Nonius KappaCCD area-detector |
Absorption correction | Multi-scan (Blessing, 1995) |
Tmin, Tmax | 0.433, 0.628 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 17133, 2049, 1780 |
Rint | 0.089 |
(sin θ/λ)max (Å−1) | 0.704 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.086, 0.238, 1.14 |
No. of reflections | 2049 |
No. of parameters | 122 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 1.63, −0.83 |
Computer programs: COLLECT (Nonius, 2000), DENZO–SMN (Otwinowski & Minor, 1997), DENZO–SMN and SCALEPACK (Otwinowski & Minor, 1997), DIRDIF99 (Beurskens et al., 1999), SHELXL97 (Sheldrick, 1997), ORTEP-3 (Farrugia, 1997), PLATON (Spek, 2003).
D—H···A | D—H | H···A | D···A | D—H···A |
C32—H32···N2 | 0.95 | 2.44 | 2.774 | 100 |
C36—H36···O41 | 0.95 | 2.16 | 3.037 | 153 |
C41—H41···N11i | 0.95 | 2.52 | 3.410 | 157 |
Symmetry code: (i) −x, y, −z. |
A literature survey shows that a large number of simple, N-bridged, nitrogen- and sulfur-containing heterocyclic compounds, containing the pyrimidine unit, are associated with diverse biological activities (Wichmann et al., 1999; El-Bendary et al., 1998; Kirpal, 1999; Tsuji & Ishikawa, 1994). Pyrazoles constitute an important class of heterocycles, which display interesting biological properties such as fungicidal, anti-inflammatory, anti-arthritic, antidepressant and antiviral activity. Many pyrazolines also find utility as polymer intermediates in industry (Mohan et al., 1989; Baraldi et al., 1996; Baraldi et al., 2003; Sanjay et al., 2006).
In the title compound, Fig. 1, C14H9BrN4O, the molecule is planar, lying on a mirror plane (Fig. 3). The molecules are linked by C—H···N hydrogen bonds; intramolecular C—H···N and C—H···O hydrogen bonds are also present. Furthermore, there is a short intermolecular contact between Br1 and O41ii [2.869 (5) Å; symmetry code: (ii) x, y, z - 1]. Recently a similar structure, 3-(4-chlorophenyl)-1- (4,6-dimethylpyrimidin-2-yl)-1H-pyrazole-4-carbaldehyde, has been published (Thiruvalluvar et al., 2007); however, it is not planar.