N′-(3-Methyl­quinoxalin-2-yl)-N′-phenyl­benzohydrazide

Ramli, Y.; Moussaif, A.; Zouihri, H.; Bourichi, H.; Essassi, E.M.

doi:10.1107/S160053681101703X

N′-(3-Methylquinoxalin-2-yl)-N′-phenylbenzohydrazide

Y. Ramli, A. Moussaif, H. Zouihri, H. Bourichi and E. M. Essassi

In the crystal structure of the title compound, C₂₂H₁₈N₄O, the quinoxaline system makes dihedral angles of 86.59 (7) and 63.37 (9)° with the benzohydrazide and phenyl rings, respectively. The benzohydrazide ring makes a dihedral angle of 72.46 (10)° with the phenyl ring. The crystal structure is stabilized by intermolecular N—H

O hydrogen bonds, C—H

O contacts and C—H

π interactions.

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Supporting information

	Crystallographic Information File (CIF) https://doi.org/10.1107/S160053681101703X/bt5532sup1.cif Contains datablocks I, global
	Structure factor file (CIF format) https://doi.org/10.1107/S160053681101703X/bt5532Isup2.hkl Contains datablock I
	MDL mol file https://doi.org/10.1107/S160053681101703X/bt5532Isup3.mol Supplementary material
	Chemical Markup Language (CML) file https://doi.org/10.1107/S160053681101703X/bt5532Isup4.cml Supplementary material

checkCIF report

Key indicators

Single-crystal X-ray study
T = 296 K
Mean (C-C) = 0.003 Å
R factor = 0.048
wR factor = 0.130
Data-to-parameter ratio = 18.4

checkCIF/PLATON results

No syntax errors found



Alert level C
PLAT230_ALERT_2_C Hirshfeld Test Diff for    C3     --  C4      ..       7.00 su
PLAT230_ALERT_2_C Hirshfeld Test Diff for    C11    --  C12     ..       7.00 su
PLAT230_ALERT_2_C Hirshfeld Test Diff for    C18    --  C19     ..       6.00 su
PLAT911_ALERT_3_C Missing # FCF Refl Between THmin & STh/L=  0.600          3
PLAT912_ALERT_4_C Missing # of FCF Reflections Above STh/L=  0.600          5

   0 ALERT level A = Most likely a serious problem - resolve or explain
   0 ALERT level B = A potentially serious problem, consider carefully
   5 ALERT level C = Check. Ensure it is not caused by an omission or oversight
   0 ALERT level G = General information/check it is not something unexpected

   0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   3 ALERT type 2 Indicator that the structure model may be wrong or deficient
   1 ALERT type 3 Indicator that the structure quality may be low
   1 ALERT type 4 Improvement, methodology, query or suggestion
   0 ALERT type 5 Informative message, check

Comment top

Recent advances in targeted therapeutics coupled with new approaches in target identification have accelerated the need to design small compounds with drug like properties. Quinoxaline is well known for its broad coverage in the field of medicine as well as for its application in the pharmaceuticals.

Quinoxaline derivatives were found to exhibit antimicrobial [Kleim et al. 1995], antitumor [Abasolo et al. 1987], and antituberculous activities [Rodrigo et al.2002]. They, also, exhibit interesting antifungal, herbicidal, antidyslipidemic and antioxidative properties [Jampilek et al. 2005, Sashidhara et al. 2009, Watkins et al. 2009].

In the crystal structure of the title compound, the quinoxaline system makes dihedral angles of 86.59 (7) and 63.37 (9) with the benzohydrazide and the phenyl rings, respectively. The benzohydrazide ring makes a dihedral angle of 72.46 (10) with the phenyl ring. The crystal packing is stabilized by N—H···O hydrogen bonds and C—H···π interactions [Cg1: (C1 — C2 — C3 — C4 — C5 — C6), and Cg2: (C8 — C9 — C10 — C11 — C12 — C13)].

Related literature top

For the biological activity of quinoxaline derivatives, see: Kleim et al. (1995). For the antitumour and antituberculous properties of quinoxaline derivatives, see: Abasolo et al. (1987); Rodrigo et al. (2002). For interesting antifungal, herbicidal, antidyslipidemic and antioxidative activities of quinoxaline derivatives, see: Jampilek et al. (2005); Sashidhara et al. (2009); Watkins et al. (2009).

Experimental top

6.5 mmole of 3-methylquinoxalin-2-one are dissolved in 40 ml of THF,8.1 mmol of diphenylnitrileimine and 8.1 mmoles of TEA are added. this mixture solution surmounted by a CaCl2, is refluxed for 24–48 h.After cooling, the salts are removed by filtration and the solvent was evaporated under reduced pressure. The single crystals have been obtained by recrystallization in ethanol.

Structure description top

Computing details top

Data collection: APEX2 (Bruker, 2005); cell refinement: SAINT (Bruker, 2005); data reduction: SAINT (Bruker, 2005); 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: publCIF (Westrip, 2010).

Figures top

	Fig. 1. Molecular view of the title compound showing the atom-labeling scheme. Displacement ellipsoids are drawn at the 50% probability level. H atoms are represented as small spheres of arbitrary radii.
	Fig. 2. Partial packing view showing the chain formed by N—H···N hydrogen bondings. H atoms not involved in hydrogen bonds have been omitted for clarity

N'-(3-Methylquinoxalin-2-yl)-N'-phenylbenzohydrazide top

Crystal data top

C₂₂H₁₈N₄O	F(000) = 744
M_r = 354.40	D_x = 1.262 Mg m⁻³
Monoclinic, P2₁/c	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybc	Cell parameters from 345 reflections
a = 18.6809 (12) Å	θ = 2.7–26.8°
b = 10.5840 (8) Å	µ = 0.08 mm⁻¹
c = 9.5860 (6) Å	T = 296 K
β = 100.108 (3)°	Prism, colourless
V = 1865.9 (2) Å³	0.35 × 0.34 × 0.18 mm
Z = 4

Data collection top

Bruker APEXII CCD detector diffractometer	2286 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tube	R_int = 0.044
Graphite monochromator	θ_max = 28.0°, θ_min = 1.1°
ω and φ scans	h = −24→24
19397 measured reflections	k = −8→13
4502 independent reflections	l = −12→10

Refinement top

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)] = 0.048	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.130	H-atom parameters constrained
S = 1.01	w = 1/[σ²(F_o²) + (0.0573P)²] where P = (F_o² + 2F_c²)/3
4502 reflections	(Δ/σ)_max < 0.001
245 parameters	Δρ_max = 0.13 e Å⁻³
0 restraints	Δρ_min = −0.20 e Å⁻³

Crystal data top

C₂₂H₁₈N₄O	V = 1865.9 (2) Å³
M_r = 354.40	Z = 4
Monoclinic, P2₁/c	Mo Kα radiation
a = 18.6809 (12) Å	µ = 0.08 mm⁻¹
b = 10.5840 (8) Å	T = 296 K
c = 9.5860 (6) Å	0.35 × 0.34 × 0.18 mm
β = 100.108 (3)°

Data collection top

Bruker APEXII CCD detector diffractometer	2286 reflections with I > 2σ(I)
19397 measured reflections	R_int = 0.044
4502 independent reflections

Refinement top

R[F² > 2σ(F²)] = 0.048	0 restraints
wR(F²) = 0.130	H-atom parameters constrained
S = 1.01	Δρ_max = 0.13 e Å⁻³
4502 reflections	Δρ_min = −0.20 e Å⁻³
245 parameters

Special details top

Experimental. The data collection nominally covered a sphere of reciprocal space, by a combination of two sets of exposures; each set had a different φ angle for the crystal and each exposure covered 0.5° in ω and 30 s in time. The crystal-to-detector distance was 37.5 mm.

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å²) top

	x	y	z	U_iso*/U_eq
N1	0.26330 (7)	0.48128 (13)	0.36620 (14)	0.0485 (4)
N2	0.16619 (8)	0.65538 (14)	0.21427 (16)	0.0568 (4)
N3	0.20960 (7)	0.31873 (13)	0.22361 (14)	0.0480 (4)
O1	0.30401 (6)	0.31707 (11)	0.04356 (12)	0.0578 (3)
C8	0.38609 (8)	0.17788 (14)	0.18621 (16)	0.0439 (4)
C7	0.31928 (8)	0.25585 (14)	0.15321 (16)	0.0415 (4)
C21	0.26800 (9)	0.60703 (16)	0.39925 (18)	0.0494 (4)
N4	0.27553 (7)	0.25367 (12)	0.25080 (13)	0.0465 (3)
H6	0.2880	0.2128	0.3288	0.056*
C14	0.21230 (8)	0.44722 (15)	0.26227 (17)	0.0437 (4)
C15	0.16273 (8)	0.53545 (17)	0.18063 (17)	0.0488 (4)
C16	0.21862 (9)	0.69384 (16)	0.32436 (19)	0.0524 (4)
C6	0.14703 (9)	0.24218 (16)	0.21688 (17)	0.0483 (4)
C20	0.32204 (10)	0.65006 (19)	0.5091 (2)	0.0669 (5)
H20	0.3549	0.5931	0.5588	0.080*
C13	0.39464 (10)	0.08112 (17)	0.28516 (18)	0.0595 (5)
H13	0.3579	0.0650	0.3368	0.071*
C22	0.11033 (9)	0.49634 (18)	0.05163 (19)	0.0671 (5)
H22A	0.0695	0.4544	0.0797	0.101*
H22B	0.1340	0.4398	−0.0040	0.101*
H22C	0.0937	0.5697	−0.0036	0.101*
C17	0.22522 (11)	0.82237 (18)	0.3608 (2)	0.0722 (6)
H17	0.1934	0.8811	0.3116	0.087*
C1	0.08899 (9)	0.28171 (18)	0.27791 (19)	0.0597 (5)
H1	0.0921	0.3569	0.3288	0.072*
C19	0.32655 (12)	0.7747 (2)	0.5432 (2)	0.0783 (6)
H19	0.3621	0.8024	0.6172	0.094*
C9	0.44130 (10)	0.19941 (18)	0.1104 (2)	0.0680 (5)
H9	0.4366	0.2633	0.0428	0.082*
C5	0.14310 (10)	0.12638 (18)	0.14787 (18)	0.0647 (5)
H5	0.1821	0.0976	0.1083	0.078*
C12	0.45673 (13)	0.0085 (2)	0.3081 (2)	0.0784 (6)
H12	0.4617	−0.0562	0.3747	0.094*
C18	0.27851 (12)	0.8610 (2)	0.4687 (2)	0.0800 (7)
H18	0.2826	0.9462	0.4925	0.096*
C3	0.02217 (13)	0.0973 (3)	0.1942 (3)	0.0912 (7)
H3	−0.0202	0.0496	0.1845	0.109*
C11	0.51074 (12)	0.0315 (2)	0.2334 (3)	0.0920 (8)
H11	0.5527	−0.0174	0.2492	0.110*
C2	0.02629 (11)	0.2097 (2)	0.2635 (2)	0.0786 (6)
H2	−0.0132	0.2385	0.3015	0.094*
C4	0.08056 (14)	0.0540 (2)	0.1384 (2)	0.0846 (7)
H4	0.0781	−0.0244	0.0940	0.102*
C10	0.50361 (11)	0.1261 (2)	0.1350 (3)	0.0936 (7)
H10	0.5408	0.1413	0.0842	0.112*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
N1	0.0488 (8)	0.0440 (9)	0.0508 (9)	−0.0024 (6)	0.0038 (7)	−0.0003 (7)
N2	0.0587 (10)	0.0500 (9)	0.0627 (10)	0.0109 (7)	0.0132 (8)	0.0060 (8)
N3	0.0438 (8)	0.0416 (8)	0.0578 (9)	0.0045 (6)	0.0069 (6)	−0.0038 (7)
O1	0.0811 (9)	0.0501 (7)	0.0434 (7)	0.0102 (6)	0.0140 (6)	0.0074 (6)
C8	0.0494 (10)	0.0392 (9)	0.0430 (9)	0.0002 (7)	0.0078 (8)	−0.0100 (8)
C7	0.0550 (10)	0.0329 (8)	0.0367 (9)	−0.0027 (7)	0.0085 (8)	−0.0046 (7)
C21	0.0529 (11)	0.0451 (10)	0.0525 (10)	−0.0055 (8)	0.0155 (9)	−0.0019 (9)
N4	0.0519 (8)	0.0461 (8)	0.0425 (8)	0.0109 (7)	0.0108 (6)	0.0039 (6)
C14	0.0434 (9)	0.0433 (10)	0.0463 (10)	0.0012 (7)	0.0130 (8)	−0.0007 (8)
C15	0.0464 (10)	0.0515 (11)	0.0491 (10)	0.0040 (8)	0.0102 (8)	0.0025 (8)
C16	0.0593 (11)	0.0452 (11)	0.0568 (11)	0.0018 (8)	0.0211 (9)	−0.0004 (9)
C6	0.0535 (11)	0.0469 (10)	0.0420 (9)	−0.0038 (8)	0.0014 (8)	0.0021 (8)
C20	0.0673 (13)	0.0631 (13)	0.0680 (13)	−0.0137 (10)	0.0057 (10)	−0.0070 (10)
C13	0.0703 (12)	0.0569 (12)	0.0530 (11)	0.0181 (9)	0.0151 (9)	0.0026 (9)
C22	0.0625 (12)	0.0742 (14)	0.0594 (12)	0.0054 (10)	−0.0036 (9)	0.0084 (10)
C17	0.0926 (16)	0.0447 (12)	0.0864 (15)	0.0049 (10)	0.0350 (13)	−0.0032 (11)
C1	0.0585 (12)	0.0592 (12)	0.0619 (12)	−0.0044 (9)	0.0119 (9)	0.0024 (9)
C19	0.0889 (16)	0.0694 (16)	0.0789 (15)	−0.0287 (12)	0.0211 (12)	−0.0173 (12)
C9	0.0633 (13)	0.0635 (13)	0.0811 (14)	−0.0031 (10)	0.0237 (11)	−0.0011 (11)
C5	0.0803 (14)	0.0571 (12)	0.0537 (11)	−0.0069 (10)	0.0030 (10)	−0.0043 (10)
C12	0.0894 (16)	0.0696 (15)	0.0717 (14)	0.0300 (12)	0.0017 (13)	−0.0025 (11)
C18	0.1086 (18)	0.0520 (13)	0.0909 (17)	−0.0234 (13)	0.0488 (15)	−0.0208 (13)
C3	0.0790 (17)	0.101 (2)	0.0875 (17)	−0.0368 (14)	−0.0014 (13)	0.0133 (15)
C11	0.0630 (15)	0.0860 (18)	0.119 (2)	0.0220 (13)	−0.0057 (14)	−0.0242 (16)
C2	0.0630 (14)	0.0899 (17)	0.0824 (15)	−0.0134 (12)	0.0112 (11)	0.0153 (13)
C4	0.1145 (19)	0.0618 (14)	0.0688 (14)	−0.0309 (14)	−0.0081 (13)	−0.0045 (11)
C10	0.0595 (14)	0.0962 (19)	0.133 (2)	−0.0001 (13)	0.0396 (14)	−0.0130 (17)

Geometric parameters (Å, º) top

N1—C14	1.3028 (19)	C22—H22A	0.9600
N1—C21	1.367 (2)	C22—H22B	0.9600
N2—C15	1.308 (2)	C22—H22C	0.9600
N2—C16	1.370 (2)	C17—C18	1.366 (3)
N3—N4	1.3951 (16)	C17—H17	0.9300
N3—C14	1.408 (2)	C1—C2	1.384 (2)
N3—C6	1.414 (2)	C1—H1	0.9300
O1—C7	1.2251 (17)	C19—C18	1.388 (3)
C8—C9	1.381 (2)	C19—H19	0.9300
C8—C13	1.386 (2)	C9—C10	1.385 (3)
C8—C7	1.483 (2)	C9—H9	0.9300
C7—N4	1.3461 (18)	C5—C4	1.387 (3)
C21—C20	1.401 (2)	C5—H5	0.9300
C21—C16	1.406 (2)	C12—C11	1.358 (3)
N4—H6	0.8600	C12—H12	0.9300
C14—C15	1.445 (2)	C18—H18	0.9300
C15—C22	1.495 (2)	C3—C2	1.358 (3)
C16—C17	1.405 (2)	C3—C4	1.375 (3)
C6—C1	1.384 (2)	C3—H3	0.9300
C6—C5	1.389 (2)	C11—C10	1.366 (3)
C20—C19	1.358 (3)	C11—H11	0.9300
C20—H20	0.9300	C2—H2	0.9300
C13—C12	1.376 (2)	C4—H4	0.9300
C13—H13	0.9300	C10—H10	0.9300

C14—N1—C21	117.07 (14)	H22A—C22—H22C	109.5
C15—N2—C16	118.43 (14)	H22B—C22—H22C	109.5
N4—N3—C14	115.97 (12)	C18—C17—C16	119.9 (2)
N4—N3—C6	114.91 (13)	C18—C17—H17	120.0
C14—N3—C6	123.80 (13)	C16—C17—H17	120.0
C9—C8—C13	118.36 (16)	C2—C1—C6	120.24 (19)
C9—C8—C7	118.30 (16)	C2—C1—H1	119.9
C13—C8—C7	123.28 (15)	C6—C1—H1	119.9
O1—C7—N4	121.80 (14)	C20—C19—C18	120.6 (2)
O1—C7—C8	122.53 (14)	C20—C19—H19	119.7
N4—C7—C8	115.66 (14)	C18—C19—H19	119.7
N1—C21—C20	119.94 (17)	C8—C9—C10	120.1 (2)
N1—C21—C16	120.52 (16)	C8—C9—H9	120.0
C20—C21—C16	119.53 (17)	C10—C9—H9	120.0
C7—N4—N3	119.04 (13)	C4—C5—C6	119.50 (19)
C7—N4—H6	120.5	C4—C5—H5	120.3
N3—N4—H6	120.5	C6—C5—H5	120.3
N1—C14—N3	117.14 (14)	C11—C12—C13	120.0 (2)
N1—C14—C15	123.27 (15)	C11—C12—H12	120.0
N3—C14—C15	119.46 (14)	C13—C12—H12	120.0
N2—C15—C14	119.62 (15)	C17—C18—C19	120.8 (2)
N2—C15—C22	118.00 (15)	C17—C18—H18	119.6
C14—C15—C22	122.24 (16)	C19—C18—H18	119.6
N2—C16—C17	119.95 (17)	C2—C3—C4	120.1 (2)
N2—C16—C21	121.02 (16)	C2—C3—H3	119.9
C17—C16—C21	118.99 (18)	C4—C3—H3	119.9
C1—C6—C5	119.22 (17)	C12—C11—C10	120.3 (2)
C1—C6—N3	120.67 (15)	C12—C11—H11	119.9
C5—C6—N3	120.11 (16)	C10—C11—H11	119.9
C19—C20—C21	120.2 (2)	C3—C2—C1	120.4 (2)
C19—C20—H20	119.9	C3—C2—H2	119.8
C21—C20—H20	119.9	C1—C2—H2	119.8
C12—C13—C8	120.95 (19)	C3—C4—C5	120.5 (2)
C12—C13—H13	119.5	C3—C4—H4	119.8
C8—C13—H13	119.5	C5—C4—H4	119.8
C15—C22—H22A	109.5	C11—C10—C9	120.4 (2)
C15—C22—H22B	109.5	C11—C10—H10	119.8
H22A—C22—H22B	109.5	C9—C10—H10	119.8
C15—C22—H22C	109.5

C21—N1—C14—N3	177.02 (16)	O1—C7—C8—C9	16.7 (3)
C21—N1—C14—C15	1.5 (3)	O1—C7—C8—C13	−160.64 (18)
C14—N1—C21—C16	0.9 (3)	N4—C7—C8—C9	−164.24 (18)
C14—N1—C21—C20	−179.40 (18)	N4—C7—C8—C13	18.4 (3)
C16—N2—C15—C14	1.8 (3)	C7—C8—C9—C10	−178.0 (2)
C16—N2—C15—C22	−174.01 (17)	C13—C8—C9—C10	−0.5 (3)
C15—N2—C16—C17	178.2 (2)	C7—C8—C13—C12	177.6 (2)
C15—N2—C16—C21	0.4 (3)	C9—C8—C13—C12	0.3 (3)
C6—N3—N4—C7	117.98 (18)	C8—C9—C10—C11	0.4 (4)
C14—N3—N4—C7	−86.8 (2)	C9—C10—C11—C12	−0.1 (5)
N4—N3—C6—C1	138.71 (18)	C10—C11—C12—C13	−0.2 (5)
N4—N3—C6—C5	−41.6 (2)	C11—C12—C13—C8	0.1 (4)
C14—N3—C6—C1	−14.3 (3)	N1—C14—C15—N2	−2.9 (3)
C14—N3—C6—C5	165.36 (18)	N1—C14—C15—C22	172.71 (17)
N4—N3—C14—N1	−27.4 (2)	N3—C14—C15—N2	−178.39 (17)
N4—N3—C14—C15	148.32 (16)	N3—C14—C15—C22	−2.8 (3)
C6—N3—C14—N1	125.33 (19)	N2—C16—C17—C18	−178.6 (2)
C6—N3—C14—C15	−58.9 (2)	C21—C16—C17—C18	−0.8 (3)
N3—N4—C7—O1	2.7 (3)	N2—C16—C21—N1	−1.9 (3)
N3—N4—C7—C8	−176.34 (15)	N2—C16—C21—C20	178.37 (19)
C6—C1—C2—C3	2.7 (4)	C17—C16—C21—N1	−179.65 (19)
C2—C1—C6—N3	176.1 (2)	C17—C16—C21—C20	0.6 (3)
C2—C1—C6—C5	−3.6 (3)	C16—C17—C18—C19	0.0 (4)
C1—C2—C3—C4	0.1 (4)	C17—C18—C19—C20	1.0 (4)
C2—C3—C4—C5	−2.1 (4)	C18—C19—C20—C21	−1.2 (4)
C3—C4—C5—C6	1.2 (4)	C19—C20—C21—N1	−179.4 (2)
C4—C5—C6—N3	−178.0 (2)	C19—C20—C21—C16	0.4 (3)
C4—C5—C6—C1	1.6 (3)

Hydrogen-bond geometry (Å, º) top

Cg1 and Cg2 are the centroids of the C1–C6 and C8–C13 rings, respectively.

D—H···A	D—H	H···A	D···A	D—H···A
N4—H6···O1ⁱ	0.86	2.05	2.863 (2)	157
C18—H18···O1ⁱⁱ	0.93	2.57	3.496 (3)	175
C22—H22B···Cg1ⁱⁱⁱ	0.96	2.99	3.696 (2)	131
C20—H20···Cg2^iv	0.93	2.94	3.866 (2)	175

Symmetry codes: (i) x, −y+1/2, z+1/2; (ii) x, −y+3/2, z+1/2; (iii) x, −y−1/2, z−3/2; (iv) x, −y−1/2, z−1/2.

Experimental details

Crystal data
Chemical formula	C₂₂H₁₈N₄O
M_r	354.40
Crystal system, space group	Monoclinic, P2₁/c
Temperature (K)	296
a, b, c (Å)	18.6809 (12), 10.5840 (8), 9.5860 (6)
β (°)	100.108 (3)
V (Å³)	1865.9 (2)
Z	4
Radiation type	Mo Kα
µ (mm⁻¹)	0.08
Crystal size (mm)	0.35 × 0.34 × 0.18

Data collection
Diffractometer	Bruker APEXII CCD detector
Absorption correction	–
No. of measured, independent and observed [I > 2σ(I)] reflections	19397, 4502, 2286
R_int	0.044
(sin θ/λ)_max (Å⁻¹)	0.661

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.048, 0.130, 1.01
No. of reflections	4502
No. of parameters	245
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.13, −0.20

Computer programs: APEX2 (Bruker, 2005), SAINT (Bruker, 2005), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2009), publCIF (Westrip, 2010).