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

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890

4-Chloro-N-(pyrazin-2-yl)aniline

aDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
*Correspondence e-mail: seikweng@um.edu.my

(Received 4 December 2008; accepted 5 December 2008; online 13 December 2008)

In the title compound, C10H8ClN3, the dihedral angle between the aromatic rings is 43.0 (1)° and the bridging C—N—C angle is 128.19 (16)°. The amino N atom of one mol­ecule forms a hydrogen bond to the 1-N atom of an adjacent pyrazinyl ring, generating an inversion dimer.

Related literature

For the two polymorphs of N-(pyrazin-2-yl)aniline, see: Wan Saffiee et al. (2008a[Wan Saffiee, W. A. M., Idris, A., Abdullah, Z., Aiyub, Z. & Ng, S. W. (2008a). Acta Cryst. E64, o2105.]); Abdullah & Ng (2008[Abdullah, Z. & Ng, S. W. (2008). Acta Cryst. E64, o2106.]). For N-(pyrazin-2-yl)-4-toluidine; see: Wan Saffiee et al. (2008b[Wan Saffiee, W. A. M., Idris, A., Aiyub, Z., Abdullah, Z. & Ng, S. W. (2008b). Acta Cryst. E64, o2440.]).

[Scheme 1]

Experimental

Crystal data
  • C10H8ClN3

  • Mr = 205.64

  • Monoclinic, P 21 /c

  • a = 12.1257 (3) Å

  • b = 3.7944 (1) Å

  • c = 19.7242 (5) Å

  • β = 91.370 (2)°

  • V = 907.25 (4) Å3

  • Z = 4

  • Mo Kα radiation

  • μ = 0.38 mm−1

  • T = 100 (2) K

  • 0.25 × 0.05 × 0.01 mm

Data collection
  • Bruker SMART APEX diffractometer

  • Absorption correction: multi-scan (SADABS; Sheldrick, 1996[Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany.]) Tmin = 0.912, Tmax = 0.996

  • 7922 measured reflections

  • 2073 independent reflections

  • 1633 reflections with I > 2σ(I)

  • Rint = 0.033

Refinement
  • R[F2 > 2σ(F2)] = 0.037

  • wR(F2) = 0.128

  • S = 1.14

  • 2073 reflections

  • 131 parameters

  • 1 restraint

  • H atoms treated by a mixture of independent and constrained refinement

  • Δρmax = 0.39 e Å−3

  • Δρmin = −0.28 e Å−3

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A D—H H⋯A DA D—H⋯A
N1—H1⋯N2i 0.88 (1) 2.15 (1) 3.023 (2) 171 (2)
Symmetry code: (i) -x+1, -y+1, -z+1.

Data collection: APEX2 (Bruker, 2007[Bruker (2007). APEX2 and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.]); cell refinement: SAINT (Bruker, 2007[Bruker (2007). APEX2 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: X-SEED (Barbour, 2001[Barbour, L. J. (2001). J. Supramol. Chem. 1, 189-191.]); software used to prepare material for publication: publCIF (Westrip, 2009[Westrip, S. P. (2009). publCIF. In preparation.]).

Supporting information


Related literature top

For the two polymorphs of N-(pyrazin-2-yl)aniline, see: Wan Saffiee et al. (2008a); Abdullah & Ng (2008). For N-(pyrazin-2-yl)-4-toluidine; see: Wan Saffiee et al. (2008b).

Experimental top

2-Chloropyrazine (1.15 g, 10 mmol) and 4-chloroaniline (1.28 g, 10 mmol) were mixed with ethanol (2 ml) and the mixture heated at 423–433 K for 3 h. The product was dissolved in water and the solution extracted with ether. The ether phase was dried over sodium sulfate; the evaporation of the solvent gave well shaped crystals along with some unidentified brown material.

Refinement top

Carbon-bound H-atoms were placed in calculated positions (C—H 0.95 Å) and were included in the refinement in the riding model approximation, with U(H) set to 1.2Ueq(C).

The amino H-atom was located in a difference Fourier map, and was refined with a distance restraint of N–H 0.88±0.01 Å; its temperature factor was freely refined.

Computing details top

Data collection: APEX2 (Bruker, 2007); cell refinement: 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: X-SEED (Barbour, 2001); software used to prepare material for publication: publCIF (Westrip, 2009).

Figures top
[Figure 1] Fig. 1. Thermal ellipsoid plot (Barbour, 2001) of hydrogen-bonded dimeric structure of C10H8ClN3 at the 70% probability level. Hydrogen atoms are drawn as spheres of arbitrary radius. Hydrogen bonds are shown as red dashed lines.
4-Chloro-N-(pyrazin-2-yl)aniline top
Crystal data top
C10H8ClN3F(000) = 424
Mr = 205.64Dx = 1.506 Mg m3
Monoclinic, P21/cMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybcCell parameters from 2160 reflections
a = 12.1257 (3) Åθ = 2.6–28.1°
b = 3.7944 (1) ŵ = 0.38 mm1
c = 19.7242 (5) ÅT = 100 K
β = 91.370 (2)°Plate, yellow
V = 907.25 (4) Å30.25 × 0.05 × 0.01 mm
Z = 4
Data collection top
Bruker SMART APEX
diffractometer
2073 independent reflections
Radiation source: fine-focus sealed tube1633 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.033
ω scansθmax = 27.5°, θmin = 1.7°
Absorption correction: multi-scan
(SADABS; Sheldrick, 1996)
h = 1515
Tmin = 0.912, Tmax = 0.996k = 44
7922 measured reflectionsl = 2524
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.037Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.128H atoms treated by a mixture of independent and constrained refinement
S = 1.14 w = 1/[σ2(Fo2) + (0.0761P)2 + 0.0551P]
where P = (Fo2 + 2Fc2)/3
2073 reflections(Δ/σ)max = 0.001
131 parametersΔρmax = 0.39 e Å3
1 restraintΔρmin = 0.28 e Å3
Crystal data top
C10H8ClN3V = 907.25 (4) Å3
Mr = 205.64Z = 4
Monoclinic, P21/cMo Kα radiation
a = 12.1257 (3) ŵ = 0.38 mm1
b = 3.7944 (1) ÅT = 100 K
c = 19.7242 (5) Å0.25 × 0.05 × 0.01 mm
β = 91.370 (2)°
Data collection top
Bruker SMART APEX
diffractometer
2073 independent reflections
Absorption correction: multi-scan
(SADABS; Sheldrick, 1996)
1633 reflections with I > 2σ(I)
Tmin = 0.912, Tmax = 0.996Rint = 0.033
7922 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0371 restraint
wR(F2) = 0.128H atoms treated by a mixture of independent and constrained refinement
S = 1.14Δρmax = 0.39 e Å3
2073 reflectionsΔρmin = 0.28 e Å3
131 parameters
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
Cl11.04801 (4)0.07942 (15)0.36089 (3)0.0269 (2)
N10.59098 (13)0.2944 (5)0.43167 (8)0.0173 (4)
H10.5832 (19)0.359 (6)0.4742 (6)0.019 (6)*
N20.40848 (13)0.4535 (5)0.42294 (8)0.0152 (4)
N30.39085 (14)0.1755 (5)0.29204 (8)0.0182 (4)
C10.69716 (16)0.1986 (5)0.41131 (10)0.0147 (4)
C20.76584 (16)0.0278 (5)0.45861 (10)0.0165 (4)
H20.73810.03150.50180.020*
C30.87334 (16)0.0565 (5)0.44384 (10)0.0181 (4)
H30.91960.17100.47660.022*
C40.91273 (16)0.0283 (5)0.38059 (11)0.0173 (4)
C50.84635 (16)0.1980 (5)0.33265 (10)0.0176 (4)
H50.87450.25450.28940.021*
C60.73893 (16)0.2849 (5)0.34796 (10)0.0155 (4)
H60.69350.40330.31540.019*
C70.49564 (16)0.3053 (5)0.39334 (9)0.0141 (4)
C80.48498 (16)0.1632 (5)0.32725 (10)0.0159 (4)
H80.54730.05560.30750.019*
C90.30456 (17)0.3280 (6)0.32195 (10)0.0185 (4)
H90.23600.34510.29790.022*
C100.31373 (16)0.4595 (5)0.38676 (10)0.0168 (4)
H100.25030.55880.40670.020*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Cl10.0139 (3)0.0324 (3)0.0346 (3)0.0038 (2)0.0035 (2)0.0016 (2)
N10.0157 (8)0.0266 (9)0.0096 (8)0.0025 (7)0.0006 (6)0.0028 (7)
N20.0154 (8)0.0179 (8)0.0124 (8)0.0017 (6)0.0004 (6)0.0011 (6)
N30.0190 (9)0.0222 (9)0.0134 (8)0.0051 (7)0.0009 (6)0.0010 (7)
C10.0134 (9)0.0158 (9)0.0148 (9)0.0009 (7)0.0007 (7)0.0024 (7)
C20.0194 (10)0.0181 (10)0.0121 (9)0.0008 (8)0.0014 (7)0.0000 (7)
C30.0180 (10)0.0168 (10)0.0192 (10)0.0019 (8)0.0039 (8)0.0009 (8)
C40.0121 (9)0.0178 (10)0.0219 (10)0.0001 (7)0.0004 (7)0.0040 (8)
C50.0177 (10)0.0203 (10)0.0148 (9)0.0034 (8)0.0028 (7)0.0018 (8)
C60.0155 (9)0.0166 (9)0.0142 (9)0.0008 (7)0.0017 (7)0.0005 (7)
C70.0143 (9)0.0154 (9)0.0125 (9)0.0014 (7)0.0003 (7)0.0020 (7)
C80.0164 (10)0.0186 (10)0.0129 (9)0.0012 (8)0.0024 (7)0.0008 (8)
C90.0154 (10)0.0236 (10)0.0163 (10)0.0025 (8)0.0018 (7)0.0045 (8)
C100.0145 (9)0.0192 (10)0.0167 (10)0.0008 (8)0.0013 (7)0.0026 (8)
Geometric parameters (Å, º) top
Cl1—C41.743 (2)C3—C41.385 (3)
N1—C71.367 (2)C3—H30.9500
N1—C11.406 (2)C4—C51.386 (3)
N1—H10.881 (10)C5—C61.384 (3)
N2—C101.338 (2)C5—H50.9500
N2—C71.343 (2)C6—H60.9500
N3—C81.323 (3)C7—C81.414 (3)
N3—C91.344 (3)C8—H80.9500
C1—C21.395 (3)C9—C101.374 (3)
C1—C61.398 (3)C9—H90.9500
C2—C31.380 (3)C10—H100.9500
C2—H20.9500
C7—N1—C1128.19 (16)C6—C5—H5120.1
C7—N1—H1114.2 (15)C4—C5—H5120.1
C1—N1—H1117.6 (15)C5—C6—C1120.14 (18)
C10—N2—C7116.74 (16)C5—C6—H6119.9
C8—N3—C9117.11 (17)C1—C6—H6119.9
C2—C1—C6118.89 (18)N2—C7—N1115.87 (17)
C2—C1—N1117.73 (17)N2—C7—C8120.33 (17)
C6—C1—N1123.26 (17)N1—C7—C8123.78 (18)
C3—C2—C1121.21 (18)N3—C8—C7121.97 (18)
C3—C2—H2119.4N3—C8—H8119.0
C1—C2—H2119.4C7—C8—H8119.0
C2—C3—C4118.96 (18)N3—C9—C10121.19 (19)
C2—C3—H3120.5N3—C9—H9119.4
C4—C3—H3120.5C10—C9—H9119.4
C3—C4—C5121.05 (18)N2—C10—C9122.63 (18)
C3—C4—Cl1119.53 (16)N2—C10—H10118.7
C5—C4—Cl1119.42 (16)C9—C10—H10118.7
C6—C5—C4119.75 (19)
C7—N1—C1—C2146.4 (2)N1—C1—C6—C5176.58 (18)
C7—N1—C1—C637.6 (3)C10—N2—C7—N1178.56 (17)
C6—C1—C2—C30.1 (3)C10—N2—C7—C80.4 (3)
N1—C1—C2—C3176.21 (19)C1—N1—C7—N2171.00 (19)
C1—C2—C3—C40.5 (3)C1—N1—C7—C810.9 (3)
C2—C3—C4—C50.6 (3)C9—N3—C8—C70.4 (3)
C2—C3—C4—Cl1179.50 (16)N2—C7—C8—N31.2 (3)
C3—C4—C5—C60.0 (3)N1—C7—C8—N3179.22 (19)
Cl1—C4—C5—C6179.91 (15)C8—N3—C9—C101.1 (3)
C4—C5—C6—C10.6 (3)C7—N2—C10—C91.1 (3)
C2—C1—C6—C50.7 (3)N3—C9—C10—N21.9 (3)
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N1—H1···N2i0.88 (1)2.15 (1)3.023 (2)171 (2)
Symmetry code: (i) x+1, y+1, z+1.

Experimental details

Crystal data
Chemical formulaC10H8ClN3
Mr205.64
Crystal system, space groupMonoclinic, P21/c
Temperature (K)100
a, b, c (Å)12.1257 (3), 3.7944 (1), 19.7242 (5)
β (°) 91.370 (2)
V3)907.25 (4)
Z4
Radiation typeMo Kα
µ (mm1)0.38
Crystal size (mm)0.25 × 0.05 × 0.01
Data collection
DiffractometerBruker SMART APEX
diffractometer
Absorption correctionMulti-scan
(SADABS; Sheldrick, 1996)
Tmin, Tmax0.912, 0.996
No. of measured, independent and
observed [I > 2σ(I)] reflections
7922, 2073, 1633
Rint0.033
(sin θ/λ)max1)0.650
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.037, 0.128, 1.14
No. of reflections2073
No. of parameters131
No. of restraints1
H-atom treatmentH atoms treated by a mixture of independent and constrained refinement
Δρmax, Δρmin (e Å3)0.39, 0.28

Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), X-SEED (Barbour, 2001), publCIF (Westrip, 2009).

Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N1—H1···N2i0.88 (1)2.15 (1)3.023 (2)171 (2)
Symmetry code: (i) x+1, y+1, z+1.
 

Acknowledgements

We thank the University of Malaya for supporting this study (FS205/2008 A).

References

First citationAbdullah, Z. & Ng, S. W. (2008). Acta Cryst. E64, o2106.  Web of Science CSD CrossRef IUCr Journals Google Scholar
First citationBarbour, L. J. (2001). J. Supramol. Chem. 1, 189–191.  CrossRef CAS Google Scholar
First citationBruker (2007). APEX2 and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.  Google Scholar
First citationSheldrick, G. M. (1996). SADABS. University of Göttingen, Germany.  Google Scholar
First citationSheldrick, G. M. (2008). Acta Cryst. A64, 112–122.  Web of Science CrossRef CAS IUCr Journals Google Scholar
First citationWan Saffiee, W. A. M., Idris, A., Abdullah, Z., Aiyub, Z. & Ng, S. W. (2008a). Acta Cryst. E64, o2105.  Web of Science CSD CrossRef IUCr Journals Google Scholar
First citationWan Saffiee, W. A. M., Idris, A., Aiyub, Z., Abdullah, Z. & Ng, S. W. (2008b). Acta Cryst. E64, o2440.  Web of Science CSD CrossRef IUCr Journals Google Scholar
First citationWestrip, S. P. (2009). publCIF. In preparation.  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.

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890
Follow Acta Cryst. E
Sign up for e-alerts
Follow Acta Cryst. on Twitter
Follow us on facebook
Sign up for RSS feeds