organic compounds
N-(4-Methylphenyl)-6-(pyrazol-1-yl)pyridazin-3-amine
aDepartment of Chemistry, Islamia University, Bahawalpur, Pakistan, Applied Chemistry Research Center, PCSIR Laboratories Complex, Lahore 54600, Pakistan, bDepartment of Physics, University of Sargodha, Sargodha, Pakistan, cDepartment of Chemistry, Islamia University, Bahawalpur, Pakistan, dInstitute of Chemistry, University of the Punjab, Lahore, Pakistan, and eInstituto de Quimica, Universidade Estadual de Londrina, Londrina, Pr., Brazil
*Correspondence e-mail: dmntahir_uos@yahoo.com
In the title compound, C14H13N5, the pyrazole ring is disordered over two orientations in a 0.571 (10):0.429 (10) ratio and the dihedral angle between the pyridazine ring and the benzene ring is 28.07 (10)°. In the crystal, pairs of N—H⋯N and C—H⋯N hydrogen bonds link the molecules into dimers, with the aid of a crystallographic twofold axis. The packing is consolidated by further C—H⋯N bonds and weak C—H⋯π interactions.
Related literature
For related structures, see: Ather et al. (2009, 2010a,b,c). For graph-set notation, see: Bernstein et al. (1995).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2007); cell SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 1999) and PLATON.
Supporting information
https://doi.org/10.1107/S1600536810024700/hb5514sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810024700/hb5514Isup2.hkl
3-Chloro-6-(1H-pyrazol-1-yl)pyridazine (1.68 g, 9.33 mmol) and 4-toluidine (1 g, 9.34 mmol) were refluxed in dimethylformamide (DMF) for 2 h. The reaction mixture was concentrated under vacuum and poured in cold water. The precipitates obtained were filtered, washed with distilled water and dried to give 74.0% yield. The product obtained was purified by
and recrystallized in ethanol to afford light brown needles of title compound (I).The bond distances, bond angles and thermal elipsoids present in the pyrazol ring showed that there is disorder. Similarly difference Fourier map showed that H-atoms of methyl are also disordered. For the disordered heavy atoms the bond distances and bond angles are best fitted according to the known structures (Ather et al., 2009, 2010a,b,c). The disordered atoms were refined using equal anisotropic thermal parameters.
The H-atoms were positioned geometrically (N–H = 0.86, C–H = 0.93–0.96 Å) and refined as riding with Uiso(H) = xUeq(C, N), where x = 1.5 for methyl and x = 1.2 for all other H-atoms.
In continuation to pyrazolylpyridazine derivatives (Ather et al., 2009, 2010a, 2010b, 2010c), the title compound (I, Fig. 1) is being reported here.
The title compound is reaction product of 3-chloro-6-(1H-pyrazol-1-yl)pyridazine and 4-toluidine. There are three cyclic rings in the final product. In (I), the pyrazole ring except adjoining N-atom and H-atoms of the only methyl group are disordered over two set of sites with occupancy ratio of 0.571 (10):0.429 (10). The majority group A (N4/N5B/C12B/C13B/C14B), the pyridazine ring B (C8—C11/N3/N2) and the 4-toludine group C (N1/C1—C7) are planar with r. m. s. deviations of 0.0431, 0.0175 and 0.0153 Å respectively. The miniority disordered group D (N4/N5A/C12A/C13A/C14A) is also planar with r. m. s. deviation of 0.0555 Å. The dihedral angle between A/B, A/C and B/C is 6.46 (24)°, 32.15 (28)° and 28.07 (10)° respectively. The dihedral angle between the disordered groups A/D is 17.72 (34)°. There exist intermolecular H-bondings of N—H···N and C—H···N types (Table 1). The molecules are stabilized in the form of dimers. In dimers, one ring motif of R22(8) and two ring motifs of R22(7) types (Bernstein et al., 1995) are present (Fig. 2). C—H···π interaction (Table 1) also play role in stabilizing the molecules.
For related structures, see: Ather et al. (2009, 2010a,b,c). For graph-set notation, see: Bernstein et al. (1995).
Data collection: APEX2 (Bruker, 2007); cell
SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 1999) and PLATON (Spek, 2009).C14H13N5 | F(000) = 1056 |
Mr = 251.29 | Dx = 1.292 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2yc | Cell parameters from 1384 reflections |
a = 31.8677 (17) Å | θ = 2.7–25.2° |
b = 7.9408 (5) Å | µ = 0.08 mm−1 |
c = 10.8446 (7) Å | T = 296 K |
β = 109.715 (3)° | Needle, light brown |
V = 2583.4 (3) Å3 | 0.32 × 0.18 × 0.16 mm |
Z = 8 |
Bruker Kappa APEXII CCD diffractometer | 2336 independent reflections |
Radiation source: fine-focus sealed tube | 1384 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.059 |
Detector resolution: 7.5 pixels mm-1 | θmax = 25.2°, θmin = 2.7° |
ω scans | h = −38→38 |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | k = −9→9 |
Tmin = 0.982, Tmax = 0.988 | l = −11→13 |
9293 measured reflections |
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) = 0.176 | H-atom parameters constrained |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0773P)2 + 1.8092P] where P = (Fo2 + 2Fc2)/3 |
2336 reflections | (Δ/σ)max < 0.001 |
156 parameters | Δρmax = 0.40 e Å−3 |
11 restraints | Δρmin = −0.33 e Å−3 |
C14H13N5 | V = 2583.4 (3) Å3 |
Mr = 251.29 | Z = 8 |
Monoclinic, C2/c | Mo Kα radiation |
a = 31.8677 (17) Å | µ = 0.08 mm−1 |
b = 7.9408 (5) Å | T = 296 K |
c = 10.8446 (7) Å | 0.32 × 0.18 × 0.16 mm |
β = 109.715 (3)° |
Bruker Kappa APEXII CCD diffractometer | 2336 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | 1384 reflections with I > 2σ(I) |
Tmin = 0.982, Tmax = 0.988 | Rint = 0.059 |
9293 measured reflections |
R[F2 > 2σ(F2)] = 0.060 | 11 restraints |
wR(F2) = 0.176 | H-atom parameters constrained |
S = 1.03 | Δρmax = 0.40 e Å−3 |
2336 reflections | Δρmin = −0.33 e Å−3 |
156 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 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 | Occ. (<1) | |
N1 | −0.01706 (7) | 0.2747 (3) | 0.5655 (2) | 0.0510 (9) | |
N2 | 0.04995 (8) | 0.3448 (3) | 0.7127 (2) | 0.0510 (10) | |
N3 | 0.09382 (8) | 0.3783 (4) | 0.7500 (2) | 0.0524 (10) | |
N4 | 0.15970 (9) | 0.4068 (4) | 0.7102 (3) | 0.0707 (8) | |
N5B | 0.18195 (19) | 0.4362 (12) | 0.6217 (6) | 0.0707 (8) | 0.571 (10) |
C1 | −0.05015 (9) | 0.2122 (4) | 0.4533 (3) | 0.0442 (10) | |
C2 | −0.04181 (10) | 0.1187 (4) | 0.3561 (3) | 0.0505 (11) | |
C3 | −0.07680 (10) | 0.0626 (4) | 0.2491 (3) | 0.0530 (11) | |
C4 | −0.12061 (10) | 0.0918 (4) | 0.2371 (3) | 0.0549 (11) | |
C5 | −0.12852 (10) | 0.1783 (5) | 0.3377 (3) | 0.0559 (13) | |
C6 | −0.09415 (9) | 0.2382 (4) | 0.4439 (3) | 0.0509 (11) | |
C7 | −0.15858 (7) | 0.0306 (5) | 0.1201 (2) | 0.0777 (14) | |
C8 | 0.02676 (6) | 0.3091 (3) | 0.58716 (18) | 0.0442 (10) | |
C9 | 0.04727 (6) | 0.3151 (3) | 0.49129 (18) | 0.0533 (11) | |
C10 | 0.09141 (10) | 0.3458 (4) | 0.5291 (3) | 0.0572 (13) | |
C11 | 0.11362 (9) | 0.3742 (4) | 0.6618 (3) | 0.0502 (11) | |
C12B | 0.2222 (2) | 0.4805 (14) | 0.6947 (7) | 0.0707 (8) | 0.571 (10) |
C13B | 0.2269 (2) | 0.4969 (12) | 0.8208 (8) | 0.0707 (8) | 0.571 (10) |
C14B | 0.1867 (3) | 0.4636 (14) | 0.8260 (9) | 0.0707 (8) | 0.571 (10) |
C13A | 0.2274 (3) | 0.4340 (16) | 0.8474 (10) | 0.0707 (8) | 0.429 (10) |
C14A | 0.1844 (4) | 0.4271 (19) | 0.8420 (11) | 0.0707 (8) | 0.429 (10) |
N5A | 0.1847 (3) | 0.3606 (15) | 0.6367 (9) | 0.0707 (8) | 0.429 (10) |
C12A | 0.2262 (3) | 0.3897 (18) | 0.7145 (9) | 0.0707 (8) | 0.429 (10) |
H3 | −0.07056 | 0.00336 | 0.18333 | 0.0638* | |
H7D | −0.16231 | 0.10527 | 0.04753 | 0.1168* | 0.571 (10) |
H5 | −0.15778 | 0.19657 | 0.33365 | 0.0670* | |
H6 | −0.10053 | 0.29660 | 0.50978 | 0.0610* | |
H9 | 0.03074 | 0.29820 | 0.40341 | 0.0639* | |
H10 | 0.10641 | 0.34781 | 0.46897 | 0.0688* | |
H12B | 0.24530 | 0.49867 | 0.66181 | 0.0847* | 0.571 (10) |
H13B | 0.25249 | 0.52537 | 0.88974 | 0.0847* | 0.571 (10) |
H14B | 0.17843 | 0.47764 | 0.89986 | 0.0847* | 0.571 (10) |
H7E | −0.18551 | 0.02840 | 0.14120 | 0.1168* | 0.571 (10) |
H7F | −0.15208 | −0.08070 | 0.09709 | 0.1168* | 0.571 (10) |
H1 | −0.02583 | 0.29429 | 0.63089 | 0.0611* | |
H2 | −0.01262 | 0.09367 | 0.36274 | 0.0605* | |
H7A | −0.17227 | −0.06543 | 0.14465 | 0.1168* | 0.429 (10) |
H7B | −0.14740 | −0.00041 | 0.05142 | 0.1168* | 0.429 (10) |
H7C | −0.18023 | 0.11882 | 0.08976 | 0.1168* | 0.429 (10) |
H12A | 0.25110 | 0.38307 | 0.68855 | 0.0847* | 0.429 (10) |
H13A | 0.25231 | 0.46082 | 0.91929 | 0.0847* | 0.429 (10) |
H14A | 0.17366 | 0.43441 | 0.91163 | 0.0847* | 0.429 (10) |
U11 | U22 | U33 | U12 | U13 | U23 | |
N1 | 0.0412 (13) | 0.073 (2) | 0.0373 (15) | −0.0006 (13) | 0.0111 (11) | −0.0051 (13) |
N2 | 0.0433 (14) | 0.068 (2) | 0.0398 (15) | −0.0029 (13) | 0.0117 (11) | 0.0001 (12) |
N3 | 0.0446 (14) | 0.070 (2) | 0.0410 (15) | −0.0049 (13) | 0.0122 (12) | 0.0027 (13) |
N4 | 0.0481 (9) | 0.106 (2) | 0.0581 (12) | −0.0103 (12) | 0.0181 (8) | 0.0075 (13) |
N5B | 0.0481 (9) | 0.106 (2) | 0.0581 (12) | −0.0103 (12) | 0.0181 (8) | 0.0075 (13) |
C1 | 0.0422 (16) | 0.052 (2) | 0.0352 (16) | −0.0011 (14) | 0.0090 (13) | 0.0037 (14) |
C2 | 0.0428 (16) | 0.060 (2) | 0.0476 (19) | 0.0018 (15) | 0.0137 (14) | −0.0025 (16) |
C3 | 0.057 (2) | 0.060 (2) | 0.0432 (18) | −0.0024 (16) | 0.0186 (15) | −0.0079 (16) |
C4 | 0.0505 (18) | 0.066 (2) | 0.0430 (19) | −0.0077 (16) | 0.0088 (15) | −0.0011 (16) |
C5 | 0.0421 (17) | 0.071 (3) | 0.054 (2) | −0.0001 (16) | 0.0155 (15) | −0.0004 (17) |
C6 | 0.0459 (17) | 0.066 (2) | 0.0407 (18) | 0.0012 (16) | 0.0145 (14) | 0.0004 (15) |
C7 | 0.057 (2) | 0.101 (3) | 0.066 (2) | −0.013 (2) | 0.0088 (18) | −0.019 (2) |
C8 | 0.0447 (16) | 0.047 (2) | 0.0388 (17) | 0.0043 (14) | 0.0112 (13) | 0.0033 (14) |
C9 | 0.0527 (18) | 0.071 (2) | 0.0351 (17) | −0.0060 (16) | 0.0133 (14) | −0.0021 (15) |
C10 | 0.0534 (19) | 0.076 (3) | 0.0466 (19) | −0.0070 (17) | 0.0226 (15) | −0.0046 (17) |
C11 | 0.0452 (17) | 0.064 (2) | 0.0416 (18) | −0.0003 (15) | 0.0148 (14) | 0.0035 (16) |
C12B | 0.0481 (9) | 0.106 (2) | 0.0581 (12) | −0.0103 (12) | 0.0181 (8) | 0.0075 (13) |
C13B | 0.0481 (9) | 0.106 (2) | 0.0581 (12) | −0.0103 (12) | 0.0181 (8) | 0.0075 (13) |
C14B | 0.0481 (9) | 0.106 (2) | 0.0581 (12) | −0.0103 (12) | 0.0181 (8) | 0.0075 (13) |
C13A | 0.0481 (9) | 0.106 (2) | 0.0581 (12) | −0.0103 (12) | 0.0181 (8) | 0.0075 (13) |
C14A | 0.0481 (9) | 0.106 (2) | 0.0581 (12) | −0.0103 (12) | 0.0181 (8) | 0.0075 (13) |
N5A | 0.0481 (9) | 0.106 (2) | 0.0581 (12) | −0.0103 (12) | 0.0181 (8) | 0.0075 (13) |
C12A | 0.0481 (9) | 0.106 (2) | 0.0581 (12) | −0.0103 (12) | 0.0181 (8) | 0.0075 (13) |
N1—C1 | 1.405 (4) | C12A—C13A | 1.472 (14) |
N1—C8 | 1.363 (3) | C12B—C13B | 1.331 (11) |
N2—N3 | 1.344 (4) | C13A—C14A | 1.353 (17) |
N2—C8 | 1.342 (3) | C13B—C14B | 1.328 (12) |
N3—C11 | 1.312 (4) | C2—H2 | 0.9300 |
N4—N5B | 1.392 (7) | C3—H3 | 0.9300 |
N4—C11 | 1.407 (4) | C5—H5 | 0.9300 |
N4—C14B | 1.339 (10) | C6—H6 | 0.9300 |
N4—N5A | 1.354 (10) | C7—H7D | 0.9600 |
N4—C14A | 1.389 (12) | C7—H7E | 0.9600 |
N5A—C12A | 1.327 (14) | C7—H7F | 0.9600 |
N5B—C12B | 1.308 (10) | C7—H7A | 0.9600 |
N1—H1 | 0.8600 | C7—H7B | 0.9600 |
C1—C6 | 1.387 (4) | C7—H7C | 0.9600 |
C1—C2 | 1.386 (4) | C9—H9 | 0.9300 |
C2—C3 | 1.384 (4) | C10—H10 | 0.9300 |
C3—C4 | 1.377 (5) | C12A—H12A | 0.9300 |
C4—C5 | 1.382 (5) | C12B—H12B | 0.9300 |
C4—C7 | 1.508 (4) | C13A—H13A | 0.9300 |
C5—C6 | 1.379 (4) | C13B—H13B | 0.9300 |
C8—C9 | 1.403 (3) | C14A—H14A | 0.9300 |
C9—C10 | 1.348 (4) | C14B—H14B | 0.9300 |
C10—C11 | 1.391 (4) | ||
C1—N1—C8 | 130.3 (2) | C1—C2—H2 | 120.00 |
N3—N2—C8 | 120.5 (2) | C3—C2—H2 | 120.00 |
N2—N3—C11 | 118.9 (2) | C2—C3—H3 | 119.00 |
N5B—N4—C11 | 119.0 (4) | C4—C3—H3 | 119.00 |
N5B—N4—C14B | 105.9 (6) | C4—C5—H5 | 119.00 |
C11—N4—C14B | 132.2 (5) | C6—C5—H5 | 119.00 |
N5A—N4—C11 | 118.6 (5) | C1—C6—H6 | 120.00 |
C11—N4—C14A | 124.3 (6) | C5—C6—H6 | 120.00 |
N5A—N4—C14A | 113.3 (7) | C4—C7—H7D | 109.00 |
N4—N5A—C12A | 103.7 (8) | C4—C7—H7E | 109.00 |
N4—N5B—C12B | 104.6 (5) | C4—C7—H7F | 109.00 |
C8—N1—H1 | 115.00 | C4—C7—H7A | 109.00 |
C1—N1—H1 | 115.00 | C4—C7—H7B | 109.00 |
C2—C1—C6 | 118.2 (3) | C4—C7—H7C | 109.00 |
N1—C1—C6 | 117.1 (3) | H7D—C7—H7E | 109.00 |
N1—C1—C2 | 124.6 (3) | H7D—C7—H7F | 109.00 |
C1—C2—C3 | 120.2 (3) | H7E—C7—H7F | 110.00 |
C2—C3—C4 | 122.0 (3) | H7A—C7—H7B | 110.00 |
C3—C4—C5 | 117.3 (3) | H7A—C7—H7C | 109.00 |
C5—C4—C7 | 121.1 (3) | H7B—C7—H7C | 109.00 |
C3—C4—C7 | 121.7 (3) | C8—C9—H9 | 121.00 |
C4—C5—C6 | 121.7 (3) | C10—C9—H9 | 121.00 |
C1—C6—C5 | 120.6 (3) | C9—C10—H10 | 121.00 |
N2—C8—C9 | 120.7 (2) | C11—C10—H10 | 121.00 |
N1—C8—C9 | 125.82 (18) | C13A—C12A—H12A | 125.00 |
N1—C8—N2 | 113.5 (2) | N5A—C12A—H12A | 125.00 |
C8—C9—C10 | 118.7 (2) | C13B—C12B—H12B | 123.00 |
C9—C10—C11 | 117.3 (3) | N5B—C12B—H12B | 123.00 |
N4—C11—C10 | 121.2 (3) | C14A—C13A—H13A | 128.00 |
N3—C11—C10 | 123.8 (3) | C12A—C13A—H13A | 127.00 |
N3—C11—N4 | 114.9 (3) | C14B—C13B—H13B | 128.00 |
N5A—C12A—C13A | 110.8 (9) | C12B—C13B—H13B | 128.00 |
N5B—C12B—C13B | 113.3 (7) | C13A—C14A—H14A | 127.00 |
C12A—C13A—C14A | 104.9 (9) | N4—C14A—H14A | 127.00 |
C12B—C13B—C14B | 104.4 (7) | C13B—C14B—H14B | 125.00 |
N4—C14A—C13A | 105.3 (9) | N4—C14B—H14B | 125.00 |
N4—C14B—C13B | 110.6 (8) | ||
C8—N1—C1—C2 | 23.6 (5) | N1—C1—C2—C3 | 180.0 (3) |
C8—N1—C1—C6 | −160.4 (3) | C6—C1—C2—C3 | 3.9 (5) |
C1—N1—C8—N2 | −171.0 (3) | N1—C1—C6—C5 | −179.0 (3) |
C1—N1—C8—C9 | 11.4 (4) | C2—C1—C6—C5 | −2.7 (5) |
C8—N2—N3—C11 | −0.5 (4) | C1—C2—C3—C4 | −2.2 (5) |
N3—N2—C8—N1 | 178.7 (2) | C2—C3—C4—C5 | −0.8 (5) |
N3—N2—C8—C9 | −3.5 (4) | C2—C3—C4—C7 | 179.9 (3) |
N2—N3—C11—N4 | −178.5 (3) | C3—C4—C5—C6 | 2.1 (5) |
N2—N3—C11—C10 | 3.6 (5) | C7—C4—C5—C6 | −178.6 (3) |
C11—N4—N5B—C12B | 173.1 (6) | C4—C5—C6—C1 | −0.4 (5) |
C14B—N4—N5B—C12B | 10.1 (10) | N1—C8—C9—C10 | −178.0 (3) |
N5B—N4—C11—N3 | −168.2 (5) | N2—C8—C9—C10 | 4.6 (4) |
N5B—N4—C11—C10 | 9.8 (6) | C8—C9—C10—C11 | −1.7 (4) |
C14B—N4—C11—N3 | −10.4 (8) | C9—C10—C11—N3 | −2.4 (5) |
C14B—N4—C11—C10 | 167.5 (7) | C9—C10—C11—N4 | 179.8 (3) |
N5B—N4—C14B—C13B | −11.5 (10) | N5B—C12B—C13B—C14B | −1.2 (13) |
C11—N4—C14B—C13B | −171.3 (6) | C12B—C13B—C14B—N4 | 8.0 (12) |
N4—N5B—C12B—C13B | −5.6 (12) |
Cg1 is the centroid of the N4/N5B/C12B–C14B ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···N2i | 0.86 | 2.12 | 2.982 (3) | 178 |
C6—H6···N3i | 0.93 | 2.62 | 3.498 (4) | 157 |
C14B—H14B···N5Bii | 0.93 | 2.47 | 3.357 (11) | 160 |
C5—H5···Cg1iii | 0.93 | 2.99 | 3.527 (5) | 118 |
Symmetry codes: (i) −x, y, −z+3/2; (ii) x, −y+1, z+1/2; (iii) −x, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C14H13N5 |
Mr | 251.29 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 296 |
a, b, c (Å) | 31.8677 (17), 7.9408 (5), 10.8446 (7) |
β (°) | 109.715 (3) |
V (Å3) | 2583.4 (3) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.08 |
Crystal size (mm) | 0.32 × 0.18 × 0.16 |
Data collection | |
Diffractometer | Bruker Kappa APEXII CCD |
Absorption correction | Multi-scan (SADABS; Bruker, 2005) |
Tmin, Tmax | 0.982, 0.988 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 9293, 2336, 1384 |
Rint | 0.059 |
(sin θ/λ)max (Å−1) | 0.600 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.060, 0.176, 1.03 |
No. of reflections | 2336 |
No. of parameters | 156 |
No. of restraints | 11 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.40, −0.33 |
Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2009), WinGX (Farrugia, 1999) and PLATON (Spek, 2009).
Cg1 is the centroid of the N4/N5B/C12B–C14B ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···N2i | 0.86 | 2.12 | 2.982 (3) | 178 |
C6—H6···N3i | 0.93 | 2.62 | 3.498 (4) | 157 |
C14B—H14B···N5Bii | 0.93 | 2.47 | 3.357 (11) | 160 |
C5—H5···Cg1iii | 0.93 | 2.99 | 3.527 (5) | 118 |
Symmetry codes: (i) −x, y, −z+3/2; (ii) x, −y+1, z+1/2; (iii) −x, −y+1, −z+1. |
Acknowledgements
The authors acknowledge the provision of funds for the purchase of diffractometer and encouragement by Dr Muhammad Akram Chaudhary, Vice Chancellor, University of Sargodha, Pakistan. The authors also acknowledge the technical support provided by Bana International, Karachi, Pakistan.
References
Ather, A. Q., Şahin, O., Khan, I. U., Khan, M. A. & Büyükgüngör, O. (2010a). Acta Cryst. E66, o1295. Web of Science CSD CrossRef IUCr Journals Google Scholar
Ather, A. Q., Tahir, M. N., Khan, M. A. & Athar, M. M. (2009). Acta Cryst. E65, o1628. Web of Science CSD CrossRef IUCr Journals Google Scholar
Ather, A. Q., Tahir, M. N., Khan, M. A. & Athar, M. M. (2010b). Acta Cryst. E66, o1327. Web of Science CSD CrossRef IUCr Journals Google Scholar
Ather, A. Q., Tahir, M. N., Khan, M. A., Athar, M. M. & Bueno, E. A. S. (2010c). Acta Cryst. E66, o2016. Web of Science CSD CrossRef IUCr Journals Google Scholar
Bernstein, J., Davis, R. E., Shimoni, L. & Chang, N.-L. (1995). Angew. Chem. Int. Ed. Engl. 34, 1555–1573. CrossRef CAS Web of Science Google Scholar
Bruker (2005). SADABS. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Bruker (2007). APEX2 and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565. CrossRef IUCr Journals Google Scholar
Farrugia, L. J. (1999). J. Appl. Cryst. 32, 837–838. 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
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.
In continuation to pyrazolylpyridazine derivatives (Ather et al., 2009, 2010a, 2010b, 2010c), the title compound (I, Fig. 1) is being reported here.
The title compound is reaction product of 3-chloro-6-(1H-pyrazol-1-yl)pyridazine and 4-toluidine. There are three cyclic rings in the final product. In (I), the pyrazole ring except adjoining N-atom and H-atoms of the only methyl group are disordered over two set of sites with occupancy ratio of 0.571 (10):0.429 (10). The majority group A (N4/N5B/C12B/C13B/C14B), the pyridazine ring B (C8—C11/N3/N2) and the 4-toludine group C (N1/C1—C7) are planar with r. m. s. deviations of 0.0431, 0.0175 and 0.0153 Å respectively. The miniority disordered group D (N4/N5A/C12A/C13A/C14A) is also planar with r. m. s. deviation of 0.0555 Å. The dihedral angle between A/B, A/C and B/C is 6.46 (24)°, 32.15 (28)° and 28.07 (10)° respectively. The dihedral angle between the disordered groups A/D is 17.72 (34)°. There exist intermolecular H-bondings of N—H···N and C—H···N types (Table 1). The molecules are stabilized in the form of dimers. In dimers, one ring motif of R22(8) and two ring motifs of R22(7) types (Bernstein et al., 1995) are present (Fig. 2). C—H···π interaction (Table 1) also play role in stabilizing the molecules.