organic compounds\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\)

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ISSN: 2056-9890

2-[(5-Amino-3-methyl-1-phenyl-1H-pyrazol-4-yl)(4-chloro­phen­yl)meth­yl]malono­nitrile

aSchool of Chemical and Environmental Sciences, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China
*Correspondence e-mail: xyzh518@sohu.com, xuesen.fan@sohu.com

(Received 17 April 2008; accepted 22 April 2008; online 26 April 2008)

In the crystal structure of the title compound, C20H16ClN5, the dihedral angle between the pyrazole ring and the phenyl ring is 54.7 (1)° and that between the pyrazole ring and the chloro-substituted phenyl ring is 72.4 (1)°. The methyl H atoms are disordered over two positions with site occupancy factors of ca 0.7 and 0.3. One amino H is disordered equally over two positions. In the crystal structure, the mol­ecules are linked via inter­molecular N—H⋯N hydrogen bonding.

[Scheme 1]

Experimental

Crystal data
  • C20H16ClN5

  • Mr = 361.83

  • Orthorhombic, P b c a

  • a = 10.4700 (11) Å

  • b = 14.0482 (15) Å

  • c = 25.409 (3) Å

  • V = 3737.3 (7) Å3

  • Z = 8

  • Mo Kα radiation

  • μ = 0.22 mm−1

  • T = 294 (2) K

  • 0.49 × 0.48 × 0.45 mm

Data collection
  • Bruker SMART CCD area-detector diffractometer

  • Absorption correction: multi-scan (SADABS; Bruker, 1997[Bruker (1997). SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.]) Tmin = 0.901, Tmax = 0.908

  • 32456 measured reflections

  • 4661 independent reflections

  • 3055 reflections with I > 2σ(I)

  • Rint = 0.033

Refinement
  • R[F2 > 2σ(F2)] = 0.041

  • wR(F2) = 0.118

  • S = 1.03

  • 4661 reflections

  • 237 parameters

  • H-atom parameters constrained

  • Δρmax = 0.18 e Å−3

  • Δρmin = −0.32 e Å−3

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A D—H H⋯A DA D—H⋯A
N3—H1N3⋯N4i 0.86 2.41 3.159 (2) 146
N3—H2N3⋯N2ii 0.86 2.53 3.325 (2) 155
Symmetry codes: (i) [-x+1, y+{\script{1\over 2}}, -z+{\script{3\over 2}}]; (ii) [x+{\script{1\over 2}}, y, -z+{\script{3\over 2}}].

Data collection: SMART (Bruker, 1997[Bruker (1997). SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.]); cell refinement: SAINT (Bruker, 1997[Bruker (1997). SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.]); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); molecular graphics: SHELXTL (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); software used to prepare material for publication: SHELXTL.

Supporting information


Comment top

The structure determination was undertaken as a part of a project on the synthesis of new pyrazole derivatives. In the title compound the dihedral angle between the pyrazole ring and the non-substituted phenyl ring which is directly connected to the pyrazole ring is 54.7 (1)° and that between the pyrazole ring and the chloro-substituted phenyl ring is 72.4 (1)°. The dihedral angle between the non-substituted and the chloro-substituted phenyl ring amount to 69.7 (1)° (Fig. 1).

In the crystal structure the molecules are connected via intermolecular N—H···N hydrogen bonding between the amino group at N3 and the N atoms N2 and N4 (Fig. 2 and Table 1).

Experimental top

To 1 ml of 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]), 4-chloroaldehyde (1 mmol), malononitrile (1 mmol) and 5-amino-3-methyl-1-phenylpyrazole (1 mmol) were added. The reaction mixture was stirred at room temperature for 4 h and afterwards extracted five times with 2 ml of diethylether. The ether extracts were combined and concentrated. The obtained residue was recrystallized with 95% ethanol to give the product in a yield of 95% as white solid. Single crystals of the title compound were obtained by slow evaporation of the solvent from a petroleum ether-ethyl ether (1:1 v/v) solution.

Refinement top

All H atoms were placed in geometrically idealized positions (methyl H atoms are disordered in two orientations) and constrained to ride on their parent atoms, with C—H distances of 0.93 - 0.98 Å and with Uiso(H) = 1.2Ueq(C) (1.5 for methyl H atoms). The N-H H atoms were located in difference map, their bond lengths were set to ideal values and afterwards they were refined using a riding model with Uiso(H) = 1.2Ueq(C). One of the N-H H atoms is disordered and was refined using a split model.

Computing details top

Data collection: SMART (Bruker, 1997); cell refinement: SMART (Bruker, 1997); data reduction: SAINT (Bruker, 1997); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).

Figures top
[Figure 1] Fig. 1. Molecular structure of the title compound, with labelling displacement ellipsoids drawn at the 30% probability level. The disordering of the H atoms is not shown for clarity.
[Figure 2] Fig. 2. Crystal structure of the title compound with view along the a-axis. Intermolecular N—H···N hydrogen bonding is shown as dashed lines and the disordering of the H atoms is not shown for clarity.
2-[(5-Amino-3-methyl-1-phenyl-1H-pyrazol-4-yl)(4- chlorophenyl)methyl]malononitrile top
Crystal data top
C20H16ClN5Dx = 1.286 Mg m3
Mr = 361.83Mo Kα radiation, λ = 0.71073 Å
Orthorhombic, PbcaCell parameters from 8329 reflections
a = 10.4700 (11) Åθ = 2.5–25.8°
b = 14.0482 (15) ŵ = 0.22 mm1
c = 25.409 (3) ÅT = 294 K
V = 3737.3 (7) Å3Block, colourless
Z = 80.49 × 0.48 × 0.45 mm
F(000) = 1504
Data collection top
Bruker SMART CCD area-detector
diffractometer
4661 independent reflections
Radiation source: fine-focus sealed tube3055 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.033
ϕ and ω scansθmax = 28.4°, θmin = 2.5°
Absorption correction: multi-scan
(SADABS; Bruker, 1997)
h = 1413
Tmin = 0.901, Tmax = 0.909k = 1818
32456 measured reflectionsl = 3333
Refinement top
Refinement on F2Secondary atom site location: difference Fourier map
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.041H-atom parameters constrained
wR(F2) = 0.118 w = 1/[σ2(Fo2) + (0.0404P)2 + 1.3457P]
where P = (Fo2 + 2Fc2)/3
S = 1.03(Δ/σ)max = 0.001
4661 reflectionsΔρmax = 0.18 e Å3
237 parametersΔρmin = 0.32 e Å3
0 restraintsExtinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
Primary atom site location: structure-invariant direct methodsExtinction coefficient: 0.0012 (3)
Crystal data top
C20H16ClN5V = 3737.3 (7) Å3
Mr = 361.83Z = 8
Orthorhombic, PbcaMo Kα radiation
a = 10.4700 (11) ŵ = 0.22 mm1
b = 14.0482 (15) ÅT = 294 K
c = 25.409 (3) Å0.49 × 0.48 × 0.45 mm
Data collection top
Bruker SMART CCD area-detector
diffractometer
4661 independent reflections
Absorption correction: multi-scan
(SADABS; Bruker, 1997)
3055 reflections with I > 2σ(I)
Tmin = 0.901, Tmax = 0.909Rint = 0.033
32456 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0410 restraints
wR(F2) = 0.118H-atom parameters constrained
S = 1.03Δρmax = 0.18 e Å3
4661 reflectionsΔρmin = 0.32 e Å3
237 parameters
Special details top

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
xyzUiso*/UeqOcc. (<1)
Cl10.34596 (7)1.04230 (4)0.53076 (2)0.0837 (2)
N10.27144 (14)0.71251 (10)0.78626 (5)0.0509 (4)
N20.17726 (15)0.64522 (12)0.77803 (6)0.0605 (4)
N30.43568 (16)0.79533 (11)0.74011 (5)0.0623 (4)
N40.4155 (2)0.44105 (12)0.68772 (7)0.0751 (5)
N50.52582 (19)0.58634 (13)0.54493 (7)0.0748 (5)
C10.18531 (16)0.62494 (13)0.72710 (6)0.0512 (4)
C20.28333 (15)0.67629 (11)0.70228 (5)0.0414 (3)
C30.33723 (15)0.73171 (11)0.74145 (6)0.0429 (4)
C40.0940 (2)0.55545 (17)0.70288 (8)0.0772 (7)
H4A0.06130.58110.67060.116*0.73
H4B0.02450.54400.72670.116*0.73
H4C0.13760.49670.69580.116*0.73
H4D0.08760.50010.72490.116*0.27
H4E0.12440.53720.66870.116*0.27
H4F0.01140.58450.69960.116*0.27
C50.29537 (17)0.74496 (15)0.83845 (6)0.0579 (5)
C60.2963 (2)0.84064 (18)0.84956 (9)0.0847 (7)
H60.28120.88540.82330.102*
C70.3206 (3)0.8691 (3)0.90156 (14)0.1220 (14)
H70.32320.93350.90990.146*
C80.3407 (3)0.8023 (4)0.94005 (12)0.1401 (18)
H80.35670.82180.97440.168*
C90.3375 (3)0.7080 (3)0.92837 (10)0.1239 (13)
H90.35040.66320.95480.149*
C100.3151 (2)0.6782 (2)0.87746 (8)0.0846 (7)
H100.31330.61360.86950.102*
C110.33508 (15)0.76013 (11)0.61584 (5)0.0415 (3)
C120.22572 (17)0.79784 (13)0.59298 (6)0.0516 (4)
H120.14910.76470.59560.062*
C130.2283 (2)0.88387 (14)0.56630 (6)0.0588 (5)
H130.15450.90820.55100.071*
C140.3417 (2)0.93244 (12)0.56298 (6)0.0550 (5)
C150.45228 (19)0.89664 (13)0.58425 (7)0.0569 (5)
H150.52870.92990.58110.068*
C160.44836 (17)0.81010 (12)0.61058 (6)0.0510 (4)
H160.52300.78530.62490.061*
C170.32395 (14)0.66623 (11)0.64546 (5)0.0401 (3)
H170.25680.62960.62780.048*
C180.44800 (16)0.60557 (11)0.64192 (6)0.0444 (4)
H180.51530.63910.66130.053*
C190.42937 (18)0.51193 (13)0.66700 (6)0.0525 (4)
C200.49158 (17)0.59315 (12)0.58707 (7)0.0511 (4)
H1N30.46390.81730.76950.061*
H2N30.50270.76930.72700.061*0.50
H3N30.46470.81340.71010.061*0.50
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Cl10.1235 (5)0.0600 (3)0.0677 (3)0.0238 (3)0.0273 (3)0.0234 (2)
N10.0586 (9)0.0588 (8)0.0354 (7)0.0138 (7)0.0064 (6)0.0075 (6)
N20.0636 (9)0.0760 (11)0.0418 (8)0.0252 (8)0.0098 (7)0.0067 (7)
N30.0761 (11)0.0659 (9)0.0448 (8)0.0308 (8)0.0096 (7)0.0120 (7)
N40.1013 (14)0.0569 (10)0.0669 (11)0.0076 (9)0.0131 (10)0.0121 (8)
N50.0918 (13)0.0807 (12)0.0518 (9)0.0059 (10)0.0158 (9)0.0074 (8)
C10.0543 (10)0.0587 (10)0.0405 (8)0.0137 (8)0.0015 (7)0.0033 (7)
C20.0474 (8)0.0430 (8)0.0338 (7)0.0020 (7)0.0003 (6)0.0009 (6)
C30.0505 (9)0.0416 (8)0.0365 (7)0.0045 (7)0.0040 (6)0.0021 (6)
C40.0765 (14)0.0976 (16)0.0575 (11)0.0416 (12)0.0044 (10)0.0101 (11)
C50.0542 (10)0.0810 (13)0.0384 (8)0.0124 (9)0.0110 (7)0.0155 (8)
C60.0862 (16)0.0897 (16)0.0782 (14)0.0306 (13)0.0300 (12)0.0365 (12)
C70.102 (2)0.157 (3)0.107 (2)0.063 (2)0.0500 (18)0.088 (2)
C80.091 (2)0.268 (5)0.0613 (17)0.046 (3)0.0176 (15)0.071 (3)
C90.112 (2)0.220 (4)0.0398 (12)0.002 (3)0.0031 (13)0.0061 (18)
C100.0911 (17)0.120 (2)0.0427 (10)0.0025 (15)0.0073 (10)0.0001 (12)
C110.0507 (9)0.0458 (8)0.0281 (7)0.0033 (7)0.0007 (6)0.0010 (6)
C120.0513 (10)0.0586 (10)0.0449 (9)0.0051 (8)0.0033 (7)0.0022 (7)
C130.0670 (12)0.0632 (11)0.0461 (9)0.0200 (10)0.0025 (8)0.0052 (8)
C140.0803 (13)0.0494 (9)0.0353 (8)0.0139 (9)0.0115 (8)0.0056 (7)
C150.0649 (11)0.0555 (10)0.0503 (10)0.0040 (9)0.0091 (8)0.0076 (8)
C160.0514 (10)0.0555 (10)0.0462 (9)0.0005 (8)0.0012 (7)0.0083 (7)
C170.0450 (8)0.0438 (8)0.0315 (7)0.0024 (7)0.0039 (6)0.0020 (6)
C180.0516 (9)0.0471 (9)0.0345 (7)0.0018 (7)0.0056 (6)0.0022 (6)
C190.0623 (11)0.0530 (10)0.0421 (8)0.0088 (8)0.0079 (8)0.0005 (7)
C200.0560 (10)0.0515 (10)0.0457 (9)0.0062 (8)0.0001 (8)0.0027 (7)
Geometric parameters (Å, º) top
Cl1—C141.7477 (17)C6—H60.9300
N1—C31.3577 (19)C7—C81.371 (5)
N1—N21.3819 (19)C7—H70.9300
N1—C51.424 (2)C8—C91.359 (5)
N2—C11.328 (2)C8—H80.9300
N3—C31.365 (2)C9—C101.379 (3)
N3—H1N30.8602C9—H90.9300
N3—H2N30.8587C10—H100.9300
N3—H3N30.8595C11—C161.385 (2)
N4—C191.136 (2)C11—C121.389 (2)
N5—C201.133 (2)C11—C171.523 (2)
C1—C21.404 (2)C12—C131.386 (2)
C1—C41.499 (2)C12—H120.9300
C2—C31.384 (2)C13—C141.372 (3)
C2—C171.5117 (19)C13—H130.9300
C4—H4A0.9600C14—C151.373 (3)
C4—H4B0.9600C15—C161.388 (2)
C4—H4C0.9600C15—H150.9300
C4—H4D0.9600C16—H160.9300
C4—H4E0.9600C17—C181.556 (2)
C4—H4F0.9600C17—H170.9800
C5—C61.373 (3)C18—C191.475 (2)
C5—C101.380 (3)C18—C201.477 (2)
C6—C71.404 (4)C18—H180.9800
C3—N1—N2111.78 (12)C7—C6—H6120.9
C3—N1—C5128.89 (14)C8—C7—C6120.3 (3)
N2—N1—C5119.03 (13)C8—C7—H7119.8
C1—N2—N1104.41 (13)C6—C7—H7119.8
C3—N3—H1N3118.2C9—C8—C7120.5 (3)
C3—N3—H2N3110.3C9—C8—H8119.8
H1N3—N3—H2N3102.1C7—C8—H8119.8
C3—N3—H3N3118.9C8—C9—C10120.3 (3)
H1N3—N3—H3N3122.9C8—C9—H9119.8
H2N3—N3—H3N359.4C10—C9—H9119.8
N2—C1—C2111.96 (14)C9—C10—C5119.6 (3)
N2—C1—C4119.96 (16)C9—C10—H10120.2
C2—C1—C4128.07 (15)C5—C10—H10120.2
C3—C2—C1105.31 (13)C16—C11—C12118.19 (15)
C3—C2—C17128.66 (14)C16—C11—C17123.53 (14)
C1—C2—C17125.92 (14)C12—C11—C17118.29 (14)
N1—C3—N3122.28 (14)C13—C12—C11121.41 (17)
N1—C3—C2106.52 (13)C13—C12—H12119.3
N3—C3—C2131.19 (14)C11—C12—H12119.3
C1—C4—H4A109.5C14—C13—C12118.72 (17)
C1—C4—H4B109.5C14—C13—H13120.6
H4A—C4—H4B109.5C12—C13—H13120.6
C1—C4—H4C109.5C13—C14—C15121.56 (16)
H4A—C4—H4C109.5C13—C14—Cl1119.35 (15)
H4B—C4—H4C109.5C15—C14—Cl1119.09 (16)
C1—C4—H4D109.5C14—C15—C16119.04 (18)
H4A—C4—H4D141.1C14—C15—H15120.5
H4B—C4—H4D56.3C16—C15—H15120.5
H4C—C4—H4D56.3C11—C16—C15121.05 (16)
C1—C4—H4E109.5C11—C16—H16119.5
H4A—C4—H4E56.3C15—C16—H16119.5
H4B—C4—H4E141.1C2—C17—C11114.36 (12)
H4C—C4—H4E56.3C2—C17—C18109.95 (12)
H4D—C4—H4E109.5C11—C17—C18112.45 (12)
C1—C4—H4F109.5C2—C17—H17106.5
H4A—C4—H4F56.3C11—C17—H17106.5
H4B—C4—H4F56.3C18—C17—H17106.5
H4C—C4—H4F141.1C19—C18—C20110.08 (14)
H4D—C4—H4F109.5C19—C18—C17110.68 (14)
H4E—C4—H4F109.5C20—C18—C17112.15 (13)
C6—C5—C10121.1 (2)C19—C18—H18107.9
C6—C5—N1120.4 (2)C20—C18—H18107.9
C10—C5—N1118.53 (19)C17—C18—H18107.9
C5—C6—C7118.2 (3)N4—C19—C18177.99 (18)
C5—C6—H6120.9N5—C20—C18178.0 (2)
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N3—H1N3···N4i0.862.413.159 (2)146
N3—H2N3···N2ii0.862.533.325 (2)155
Symmetry codes: (i) x+1, y+1/2, z+3/2; (ii) x+1/2, y, z+3/2.

Experimental details

Crystal data
Chemical formulaC20H16ClN5
Mr361.83
Crystal system, space groupOrthorhombic, Pbca
Temperature (K)294
a, b, c (Å)10.4700 (11), 14.0482 (15), 25.409 (3)
V3)3737.3 (7)
Z8
Radiation typeMo Kα
µ (mm1)0.22
Crystal size (mm)0.49 × 0.48 × 0.45
Data collection
DiffractometerBruker SMART CCD area-detector
diffractometer
Absorption correctionMulti-scan
(SADABS; Bruker, 1997)
Tmin, Tmax0.901, 0.909
No. of measured, independent and
observed [I > 2σ(I)] reflections
32456, 4661, 3055
Rint0.033
(sin θ/λ)max1)0.669
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.041, 0.118, 1.03
No. of reflections4661
No. of parameters237
H-atom treatmentH-atom parameters constrained
Δρmax, Δρmin (e Å3)0.18, 0.32

Computer programs: SMART (Bruker, 1997), SAINT (Bruker, 1997), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).

Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N3—H1N3···N4i0.862.413.159 (2)146.2
N3—H2N3···N2ii0.862.533.325 (2)154.6
Symmetry codes: (i) x+1, y+1/2, z+3/2; (ii) x+1/2, y, z+3/2.
 

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 20772025), the Program for Science & Technology Innovation Talents in Universities of Henan Province (No. 2008HASTIT006) and the Department of Education of Henan Province (No. 2008 A150013).

References

First citationBruker (1997). SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.  Google Scholar
First citationSheldrick, G. M. (2008). Acta Cryst. A64, 112–122.  Web of Science CrossRef CAS IUCr Journals Google Scholar

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ISSN: 2056-9890
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