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

Journal logoCRYSTALLOGRAPHIC
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ISSN: 2056-9890
Volume 67| Part 2| February 2011| Pages o466-o467

4-(5-Amino-1H-1,2,4-triazol-3-yl)pyridinium chloride monohydrate

aSouth-Russia State Technical University, 346428 Novocherkassk, Russian Federation, and bDepartment of Chemistry, Moscow State University, 119992 Moscow, Russian Federation
*Correspondence e-mail: rybakov20021@yandex.ru

(Received 8 January 2011; accepted 17 January 2011; online 22 January 2011)

In the cation of the title compound, C7H8N5+·Cl·H2O, the mean planes of the pyridine and 1,2,4-triazole rings form a dihedral angle of 2.3 (1)°. The N atom of the amino group adopts a trigonal–pyramidal configuration. The N atom of the pyridine ring is protonated, forming a chloride salt. In the crystal, inter­molecular N—H⋯O, N—H⋯N, N—H⋯Cl and O—H⋯Cl hydrogen bonds link the cations, anions and water mol­ecules into layers parallel to the (1, 0, [{\script{1\over 2}}]) plane.

Related literature

For the use of 3-pyridyl-substituted 5-amino-1,2,4-triazoles in the synthesis of biologically active compounds, see: Lipinski (1983[Lipinski, Ch. A. (1983). J. Med. Chem. 26, 1-6.]); Ram (1988[Ram, V. J. (1988). Indian J. Chem. Sect. B, 27, 825-829.]); Akahoshi et al. (1998[Akahoshi, F., Takeda, S., Okada, T., Kajii, M., Nishimura, H., Sugiura, M., Inoue, Y., Fukaya, C., Naito, Y., Imagawa, T. & Nakamura, N. (1998). J. Med. Chem. 41, 2985-2993.]); Young et al. (2001[Young, C. K., Ho, K. S., Ghilsoo, N., Hong, S. J., Hoon, K. S., Il, Ch K., Hyup, K. J. & Deok-Chan, H. (2001). J. Antibiot. 54, 460-462.]); Ouyang et al. (2005[Ouyang, X., Chen, X., Piatnitski, E. L., Kiselyov, A. S., He, H.-Y., Mao, Y., Pattaropong, V., Yu, Y., Kim, K. H., Kincaid, J., Smith, L., Wong, W. C., Lee, S. P., Milligan, D. L., Malikzay, A., Fleming, J., Gerlak, J., Deevi, D., Doody, J. F., Chiang, H.-H., Patel, Sh. N., Wang, Y., Rolser, R. L., Kussie, P., Labelle, M. & Tuma, M. C. (2005). Bioorg. Med. Chem. Lett. 15, 5154-5159.]); Dolzhenko et al. (2007[Dolzhenko, A. V., Dolzhenko, A. V. & Chui, W.-K. (2007). Heterocycles, 71, 429-436.]). For metal complexes of 3-pyridyl-substituted 5-amino-1,2,4-tri­azoles, see: Mishra et al. (1989[Mishra, L., Ram, V. J. & Kushwaha, D. S. (1989). Transition Met. Chem. 14, 384-386.]); Ferrer et al. (2004[Ferrer, S., Ballesteros, R., Sambartolome, A., Gonzales, M., Alzuet, G., Borras, J. & Liu, M. (2004). J. Inorg. Biochem. 98, 1436-1446.]); Castineiras & Garcia-Santos (2008[Castineiras, A. & Garcia-Santos, I. (2008). Z. Anorg. Allg. Chem. 634, 2907-2916.]). For a theoretical investigation of the protonation of C-amino-1,2,4-triazoles, see: Anders et al. (1997[Anders, E., Wermann, K., Wiedel, B. & Vanden Eynde, J.-J. (1997). Liebigs Ann. Chem. Rec. pp. 745-752.]). For the crystal structures of protonated C-amino-1,2,4-triazoles, see: Lynch et al. (1999[Lynch, D. E., Dougall, T., Smith, G., Byriel, K. A. & Kennard, C. H. L. (1999). J. Chem. Crystallogr. 29, 67-73.]); Baouab et al. (2000[Baouab, L., Guerfel, T., Soussi, M. & Jouini, A. (2000). J. Chem. Crystallogr. 30, 805-809.]); Bichay et al. (2006[Bichay, M., Fronabarger, J. W., Gilardi, R., Butcher, R. J., Sanborn, W. B., Sitzmann, M. E. & Williams, M. D. (2006). Tetrahedron Lett. 47, 6663-6666.]); Guerfel et al. (2007[Guerfel, T., Guelmami, L. & Jouini, A. (2007). J. Soc. Alger. Chim. 17, 27-35.]); Matulková et al. (2007[Matulková, I., Němec, I., Císařová, I., Němec, P. & Mička, Z. (2007). J. Mol. Struct. 834, 328-335.]). For the ionization constants (pKα) of 3-substituted 5-amino-1H-1,2,4-triazoles, see: Voronkov et al. (1976[Voronkov, M. G., Kashik, T. V., Makarskii, V. V., Lopyrev, V. A., Ponomareva, S. M. & Shibanova, E. F. (1976). Dokl. Akad. Nauk SSSR, 227, 1116-1119.]). For the 1H and 13C NMR spectra of 3-pyridyl-substituted 5-amino-1,2,4-triazoles, see: Dolzhenko et al. (2009a[Dolzhenko, A. V., Pastorin, G., Dolzhenko, A. V. & Chui, W.-K. (2009a). Tetrahedron Lett. 50, 2124-2128.]). For typical NMR chemical shifts of 3-substituted 5-amino-1,2,4-triazoles and their salts, see: Chernyshev et al. (2010[Chernyshev, V. M., Chernysheva, A. V. & Starikova, Z. A. (2010). Heterocycles, 81, 229-2311.]). For the crystal structures of 3-substituted 5-amino-1H-1,2,4-triazoles, see: Rusinov et al. (1991[Rusinov, V. L., Myasnikov, A. V., Chupakhin, O. N. & Aleksandrov, G. G. (1991). Chem. Heterocycl. Compd, 27, 530-533.]); Daro et al. (2000[Daro, N., Sutter, J.-P., Pink, M. & Kahn, O. (2000). J. Chem. Soc. Perkin Trans. 2, pp. 1087-1089.]); Boechat et al. (2004[Boechat, N., Dutra, K. D. B., Valverde, A. L., Wardell, S. M. S. V., Low, J. N. & Glidewell, C. (2004). Acta Cryst. C60, o733-o736.]); Dolzhenko et al. (2009b[Dolzhenko, A. V., Tan, G. K., Koh, L. L., Dolzhenko, A. V. & Chui, W. K. (2009b). Acta Cryst. E65, o125.],c[Dolzhenko, A. V., Tan, G. K., Koh, L. L., Dolzhenko, A. V. & Chui, W. K. (2009c). Acta Cryst. E65, o126.]). For the crystal structures of 3(5)-pyridyl-substituted 1,2,4-triazoles protonated at the pyridine ring, see: Ren & Jian (2008[Ren, X.-Y. & Jian, F.-F. (2008). Acta Cryst. E64, o1792.]); Xie et al. (2009[Xie, X.-F., Chen, S.-P., Xia, Zh.-Q. & Gao, Sh.-L. (2009). Polyhedron, 28, 679-688.]); Du et al. (2009[Du, M., Jiang, X.-J., Tan, X., Zhang, Zh.-H. & Cai, H. (2009). CrystEngComm, 11, 454-462.]). For values of bond lengths in organic compounds, see: Allen et al. (1987[Allen, F. H., Kennard, O., Watson, D. G., Brammer, L., Orpen, A. G. & Taylor, R. (1987). J. Chem. Soc. Perkin Trans. 2, pp. 1-19.]). For the correlation of bond lengths with bond orders between sp2-hybridized C and N atoms, see: Burke-Laing & Laing (1976[Burke-Laing, M. & Laing, M. (1976). Acta Cryst. B32, 3216-3224.]).

[Scheme 1]

Experimental

Crystal data
  • C7H8N5+·Cl·H2O

  • Mr = 215.65

  • Monoclinic, P 21 /c

  • a = 5.3411 (5) Å

  • b = 24.656 (3) Å

  • c = 7.3488 (7) Å

  • β = 97.62 (2)°

  • V = 959.22 (18) Å3

  • Z = 4

  • Ag Kα radiation

  • λ = 0.56085 Å

  • μ = 0.20 mm−1

  • T = 295 K

  • 0.20 × 0.20 × 0.20 mm

Data collection
  • Enraf–Nonius CAD-4 diffractometer

  • Absorption correction: refined from ΔF (Walker & Stuart, 1983[Walker, N. & Stuart, D. (1983). Acta Cryst. A39, 158-166.]) Tmin = 0.314, Tmax = 0.961

  • 2389 measured reflections

  • 2389 independent reflections

  • 1518 reflections with I > 2σ(I)

  • Rint = 0.000

  • 1 standard reflections every 60 min intensity decay: 2%

Refinement
  • R[F2 > 2σ(F2)] = 0.042

  • wR(F2) = 0.109

  • S = 0.93

  • 2389 reflections

  • 151 parameters

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

  • Δρmax = 0.26 e Å−3

  • Δρmin = −0.24 e Å−3

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A D—H H⋯A DA D—H⋯A
N1—H1⋯O1i 0.876 (19) 1.97 (2) 2.842 (2) 175.0 (18)
N16—H16⋯Cl1 0.85 (2) 2.22 (2) 3.0574 (18) 169 (2)
N51—H51A⋯Cl1ii 0.82 (2) 2.52 (2) 3.3092 (18) 160.5 (19)
N51—H51B⋯N4iii 0.82 (2) 2.15 (2) 2.963 (2) 174 (2)
O1—H1A⋯Cl1iv 0.89 (3) 2.29 (3) 3.159 (2) 167 (3)
O1—H1B⋯Cl1v 0.88 (3) 2.32 (3) 3.187 (2) 168 (2)
Symmetry codes: (i) [x, -y+{\script{1\over 2}}, z+{\script{1\over 2}}]; (ii) [-x+1, y-{\script{1\over 2}}, -z+{\script{3\over 2}}]; (iii) -x+2, -y, -z+2; (iv) -x, -y+1, -z+1; (v) -x+1, -y+1, -z+1.

Data collection: CAD-4 EXPRESS (Enraf–Nonius, 1994[Enraf-Nonius (1994). CAD-4 EXPRESS. Enraf-Nonius, Delft, The Netherlands.]); cell refinement: CAD-4 EXPRESS; data reduction: XCAD4 (Harms & Wocadlo, 1995[Harms, K. & Wocadlo, S. (1995). XCAD4. University of Marburg, Germany.]); 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: ORTEP-3 (Farrugia, 1997[Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565.]); software used to prepare material for publication: WinGX (Farrugia, 1999[Farrugia, L. J. (1999). J. Appl. Cryst. 32, 837-838.]).

Supporting information


Comment top

3-Pyridyl-substituted 5-amino-1,2,4-triazoles are used as reagents and ligands for the synthesis of biologically active compounds (Lipinski, 1983; Ram, 1988; Akahoshi et al., 1998; Young et al., 2001; Ouyang et al., 2005; Dolzhenko et al., 2007) and metal complexes (Mishra et al., 1989; Ferrer et al., 2004; Castineiras & Garcia-Santos, 2008). These substances are weak bases and form salts with acids. However, the positions of protonation centres of their molecules are open to question. For example, one would assume the existence of the tautomers A–E for the hydrochloride of 5-amino-3-(pyridin-4-yl)-1,2,4-triazole (Fig. 1). The tautomers A and D can be expected to be the most probable on the basis of the theoretical investigation of the protonation of C-amino-1,2,4-triazoles (Anders et al., 1997) and X-ray studies of C-amino-1,2,4-triazolium salts (Lynch et al., 1999; Baouab et al., 2000; Bichay et al., 2006; Guerfel et al., 2007; Matulková et al., 2007). Since knowledge of specific features of protonation of 3-pyridyl-substituted 5-amino-1,2,4-triazoles is essential for understanding their reactivity and biological properties, we investigated the structure of the hydrochloride of 5-amino-3-(pyridin-4-yl)-1,2,4-triazole in the solution and solid state. This compound was obtained by one-pot synthesis starting from aminoguanidine hydrogen carbonate, isonicotinic acid and hydrochloric acid (see Fig. 2 and Experimental).

By potentiometric titration with 0.1 M hydrochloric acid we established that the pKα of the 5-amino-3-(pyridin-4-yl)-1,2,4-triazole in water is 4.68 (5) at 293 K. A model compound, 5-amino-3-phenyl-1H-1,2,4-triazole, which is protonated at the N4 of triazole cycle in acid solutions (Voronkov et al., 1976), has the pKα = 3.80 (3) at 293 K. Since the basicity of the 5-amino-3-(pyridin-4-yl)-1,2,4-triazole is almost eight times higher than the model compound, it is possible to assume that in water solution the pyridine rather than triazole cycle is protonated. In the 13C NMR spectrum of the hydrochloride of 5-amino-3-(pyridin-4-yl)-1,2,4-triazole in dimethyl sulfoxide (DMSO-d6), the signals of the triazole carbons C3' and C5' are observed at 153.71 and 157.83 ppm, correspondingly (for the chemical numbering scheme, see Fig. 1). These values are very close to the same signals of the unprotonated 5-amino-3-(pyridin-4-yl)-1H-1,2,4-triazole (Dolzhenko et al., 2009a) and are typical for 5-amino-1H-1,2,4-triazoles (Chernyshev et al., 2010). The chemical shift of the carbon connected to amino group is most representative. Thus, in the 5-amino- and 3-amino-4H-1,2,4-triazolium salts the signals of the same atoms are high field shifted to 149.3–154.7 ppm (Chernyshev et al., 2010). Therefore, it could be concluded that the triazole cycle is unprotonated in DMSO solution of the studied salt. However, the signals of the carbons of the pyridine cycle of the hydrochloride (especially the carbons, connected with nitrogen atom) differ sufficiently from the ones of unprotonated 5-amino-3-(pyridin-4-yl)-1,2,4-triazole. In the unprotonated compound the signals of C2 and C6 are detected at 149.9 ppm (Dolzhenko et al., 2009a), while in the hydrochloride they are observed at 142.9 ppm. Therefore, we can conclude that the pyridine cycle is protonated and the tautomeric form A is predominant in DMSO (Fig. 1). For unambiguous confirmation of the proposed structure, we performed an X-ray investigation of the title compound. In the ensuing discussion of the structure, the crystallographic numbering system will be used (Fig. 3). In accordance with the X-ray diffraction data, the studied compound in the crystal exists as the tautomer A (Fig. 3). The pyridine and triazole rings are almost coplanar, the dihedral angle between the planes of the rings is 2.3 (1)°. Bond lengths and angles in the triazole cycle are within the normal ranges and are comparable with those found in the other 3-substituted 5-amino-1H-1,2,4-triazoles (Rusinov et al., 1991; Daro et al., 2000; Boechat et al., 2004; Dolzhenko et al., 2009b,c). The nitrogen atom of the amino group is in a trigonal pyramidal configuration (sum of valence angles is 356.0° and deviates from the triazole plane by only 0.020 (3)Å. Conjugation between the unshared electron pair of N21 and the π-system of the triazole fragment leads to a shortening of the N21—C2 bond (1.330 (2)Å) relative to the standard length of a purely single Nsp2—Csp2 bond (1.43–1.45Å) (Burke-Laing & Laing, 1976; Allen et al., 1987). Bond lengths and angles in the pyridine cycle are analogous to the ones in the pyridyl-substituted 1,2,4-triazoles, protonated at the pyridine cycle (Ren & Jian, 2008; Xie et al., 2009; Du et al., 2009).

The wide system of hydrogen bonds are found in crystal structure of title compound. Firstly, atom Cl1 form contact 2.22 (2)Å (Table 1) with atom H16 of pyridyl moiety; secondly, atom H3 of triazole moiety, forms contact with O1i atom from water molecule (symmetry code: (i) x, -y+1/2, z+1/2; thirdly, atom H1Bi from water molecule forms contact with Cl1ii (symmetry code: (ii) -x+1, y-1/2, -z+3/2). Thus, we can see chain of hydrogen bonds along [0 1 0]. These chains form layers parallel (1, 0, 1/2) plane (Fig. 4). These layers connected by hydrogen bonds with involving H1A atoms of water molecule (Fig. 5).

In the future, it would be interesting to investigate the structure of isomers of the studied compound, i.e. salts of the 5-amino-3-(pyridin-2-yl)-1,2,4-triazole and 5-amino-3-(pyridin-3-yl)-1,2,4-triazole in order to estimate the influence of structural peculiarities on protonation.

Related literature top

For the use of 3-pyridyl-substituted 5-amino-1,2,4-triazoles in the synthesis of biologically active compounds, see: Lipinski (1983); Ram (1988); Akahoshi et al. (1998); Young et al. (2001); Ouyang et al. (2005); Dolzhenko et al. (2007). For metal complexes of 3-pyridyl-substituted 5-amino-1,2,4-triazoles, see: Mishra et al. (1989); Ferrer et al. (2004); Castineiras & Garcia-Santos (2008). For a theoretical investigation of the protonation of C-amino-1,2,4-triazoles, see: Anders et al. (1997). For the crystal structures of protonated C-amino-1,2,4-triazoles, see: Lynch et al. (1999); Baouab et al. (2000); Bichay et al. (2006); Guerfel et al. (2007); Matulková et al. (2007). For the ionization constants (pKα) of 3-substituted 5-amino-1H-1,2,4-triazoles, see: Voronkov et al. (1976). For the 1H and 13C NMR spectra of 3-pyridyl-substituted 5-amino-1,2,4-triazoles, see: Dolzhenko et al. (2009a). For typical NMR chemical shifts of 3-substituted 5-amino-1,2,4-triazoles and their salts, see: Chernyshev et al. (2010). For the crystal structures of 3-substituted 5-amino-1H-1,2,4-triazoles, see: Rusinov et al. (1991); Daro et al. (2000); Boechat et al. (2004); Dolzhenko et al. (2009b,c). For the crystal structures of 3(5)-pyridyl-substituted 1,2,4-triazoles protonated at the pyridine ring, see: Ren & Jian (2008); Xie et al. (2009); Du et al. (2009). For values of bond lengths in organic compounds, see: Allen et al. (1987). For the correlation of bond lengths with bond orders between sp2-hybridized C and N atoms, see: Burke-Laing & Laing (1976).

Experimental top

The title compound was prepared by the following procedure. A mixture of aminoguanidine hydrogen carbonate (5.53 g, 40.6 mmol), isonicotinic acid (5.01 g, 40.7 mmol) and 33.5% hydrochloric acid (5.0 ml) was heated to reflux for 15 min, then water was distilled off until the temperature of the reaction mixture raised to 448–453 K. The reaction mixture was heated at the same temperature for 6 h, cooled to ~373 K and dissolved in water (5 ml). The resulted solution was cooled to 276–278 K, the precipitate formed was isolated by filtration, recrystallized from 50% ethanol and dried at 403 K to give 6.82 g (85% yield) of yellowish powder, m. p. 579–581 K. Spectrum 1H NMR (600 MHz), δ: 6.61 (br s, 2H, NH2), 8.26 (d, J = 6.7 Hz, 2H, Ar), 8.85 (d, J = 6.7 Hz, 2H, Ar). Spectrum 13C NMR (150 MHz), δ: 121.78 (C3 and C5 of pyridine), 142.92 (C2 and C6 of pyridine), 145.51 (C4 of pyridine), 153.71 (C3' of triazole), 157.83 (C5' of triazole). MS (EI, 70 eV), m/z (%): 162 (10) [C7H8N5+], 161 (100) [C7H7N5+], 119 (26), 105 (45), 78 (46), 57 (68), 51 (71), 50 (38), 43 (38). Anal. Calcd for C7H8ClN5: C, 42.54; H, 4.08; N, 35.44. Found: C 42.35; H 4.19; N 35.18. The crystals of title compound suitable for X-ray analysis were grown by slow evaporation from water at room temperature.

Refinement top

C-bound H atoms were placed in calculated positions C—H 0.93Å and refined as riding, with Uiso(H) = 1.2Ueq(C). H-atoms forming hydrogen (N- and O-bound H atoms) bonds were found from difference Fourier map and refined independently. The initial experimental data were obtained for independent area of reciprocal space, but at the final stage of refinement procedure 'MERG 2' instruction was used and 'DIFABS CAD4' (Walker & Stuart, 1983) was applied. As a result, we have FVAR = 1, Rint = 0.

Computing details top

Data collection: CAD-4 EXPRESS (Enraf–Nonius, 1994); cell refinement: CAD-4 EXPRESS (Enraf–Nonius, 1994); data reduction: XCAD4 (Harms & Wocadlo, 1995); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).

Figures top
[Figure 1] Fig. 1. Possible tautomeric forms for hydrochloride of 5-amino-3-(pyridin-4-yl)-1,2,4-triazole.
[Figure 2] Fig. 2. Synthesis of the title compound.
[Figure 3] Fig. 3. ORTEP-3 (Farrugia, 1997) plot of molecular structure of the title compound showing the atom-numbering scheme. Displacement ellipsoids are drawn at the 50% probability level. H atoms are presented as a small spheres of arbitrary radius.
[Figure 4] Fig. 4. The molecular packing of the title compound along the b-axis showing molecular layers parallel to the plane (1, 0, 1/2). Hydrogen bonds are shown as dashed lines.
[Figure 5] Fig. 5. The molecular packing of the title compound along the c axis. Hydrogen bonds are shown as dashed lines.
4-(5-Amino-1H-1,2,4-triazol-3-yl)pyridinium chloride monohydrate top
Crystal data top
C7H8N5+·Cl·H2OF(000) = 448
Mr = 215.65Dx = 1.493 Mg m3
Monoclinic, P21/cMelting point = 579–581 K
Hall symbol: -P 2ybcAg Kα radiation, λ = 0.56085 Å
a = 5.3411 (5) ÅCell parameters from 25 reflections
b = 24.656 (3) Åθ = 12.1–14.0°
c = 7.3488 (7) ŵ = 0.20 mm1
β = 97.62 (2)°T = 295 K
V = 959.22 (18) Å3Prism, yellow
Z = 40.20 × 0.20 × 0.20 mm
Data collection top
Enraf–Nonius CAD-4
diffractometer
1518 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tubeRint = 0.000
Graphite monochromatorθmax = 22.0°, θmin = 1.3°
Non–profiled ω scansh = 77
Absorption correction: part of the refinement model (ΔF)
(Walker & Stuart, 1983)
k = 032
Tmin = 0.314, Tmax = 0.961l = 09
2389 measured reflections1 standard reflections every 60 min
2389 independent reflections intensity decay: 2%
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)] = 0.042Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.109H atoms treated by a mixture of independent and constrained refinement
S = 0.93 w = 1/[σ2(Fo2) + (0.0642P)2]
where P = (Fo2 + 2Fc2)/3
2389 reflections(Δ/σ)max = 0.001
151 parametersΔρmax = 0.26 e Å3
0 restraintsΔρmin = 0.24 e Å3
Crystal data top
C7H8N5+·Cl·H2OV = 959.22 (18) Å3
Mr = 215.65Z = 4
Monoclinic, P21/cAg Kα radiation, λ = 0.56085 Å
a = 5.3411 (5) ŵ = 0.20 mm1
b = 24.656 (3) ÅT = 295 K
c = 7.3488 (7) Å0.20 × 0.20 × 0.20 mm
β = 97.62 (2)°
Data collection top
Enraf–Nonius CAD-4
diffractometer
1518 reflections with I > 2σ(I)
Absorption correction: part of the refinement model (ΔF)
(Walker & Stuart, 1983)
Rint = 0.000
Tmin = 0.314, Tmax = 0.9611 standard reflections every 60 min
2389 measured reflections intensity decay: 2%
2389 independent reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0420 restraints
wR(F2) = 0.109H atoms treated by a mixture of independent and constrained refinement
S = 0.93Δρmax = 0.26 e Å3
2389 reflectionsΔρmin = 0.24 e Å3
151 parameters
Special details top

Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'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 > 2σ(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*/Ueq
Cl10.03502 (9)0.29662 (2)0.52890 (9)0.0585 (2)
N10.4858 (3)0.06015 (6)0.7559 (2)0.0421 (4)
H10.458 (3)0.0952 (8)0.751 (3)0.038 (5)*
N20.3363 (3)0.01915 (6)0.6821 (2)0.0438 (4)
C30.4713 (3)0.02346 (7)0.7339 (3)0.0380 (4)
N40.7008 (3)0.01345 (6)0.8344 (2)0.0401 (4)
C50.7035 (3)0.03999 (7)0.8458 (3)0.0391 (4)
C130.3868 (3)0.07839 (7)0.6860 (3)0.0376 (4)
C140.1558 (3)0.08732 (8)0.5770 (3)0.0477 (5)
H140.05360.05830.53370.057*
C150.0833 (4)0.13903 (8)0.5355 (3)0.0512 (5)
H150.06940.14550.46200.061*
N160.2275 (3)0.18070 (7)0.5984 (3)0.0514 (5)
H160.197 (4)0.2140 (9)0.580 (3)0.053 (6)*
C170.4501 (4)0.17327 (8)0.7024 (3)0.0535 (6)
H170.54840.20310.74350.064*
C180.5325 (3)0.12272 (8)0.7479 (3)0.0468 (5)
H180.68690.11770.82070.056*
N510.8895 (3)0.07055 (7)0.9294 (3)0.0514 (5)
H51A0.869 (4)0.1036 (9)0.934 (3)0.048 (6)*
H51B0.994 (4)0.0532 (9)0.998 (3)0.063 (7)*
O10.4229 (4)0.67460 (7)0.2570 (3)0.0635 (5)
H1A0.309 (6)0.6799 (12)0.333 (4)0.092 (11)*
H1B0.562 (6)0.6872 (11)0.319 (4)0.092 (10)*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Cl10.0424 (3)0.0401 (3)0.0893 (5)0.0049 (2)0.0051 (3)0.0026 (3)
N10.0292 (7)0.0325 (8)0.0603 (11)0.0045 (6)0.0100 (7)0.0005 (8)
N20.0291 (7)0.0428 (8)0.0560 (10)0.0051 (6)0.0078 (7)0.0022 (8)
C30.0237 (8)0.0429 (10)0.0452 (11)0.0004 (7)0.0041 (7)0.0041 (8)
N40.0289 (7)0.0330 (7)0.0545 (10)0.0017 (6)0.0082 (7)0.0009 (7)
C50.0283 (8)0.0359 (8)0.0501 (11)0.0031 (7)0.0063 (7)0.0005 (8)
C130.0273 (8)0.0392 (9)0.0450 (10)0.0019 (7)0.0002 (7)0.0004 (8)
C140.0320 (9)0.0486 (11)0.0584 (13)0.0007 (8)0.0092 (9)0.0014 (9)
C150.0312 (9)0.0532 (12)0.0650 (14)0.0094 (8)0.0090 (9)0.0057 (10)
N160.0413 (9)0.0419 (9)0.0686 (13)0.0117 (7)0.0012 (8)0.0048 (9)
C170.0393 (10)0.0464 (11)0.0706 (16)0.0013 (9)0.0078 (10)0.0023 (10)
C180.0285 (9)0.0426 (10)0.0657 (13)0.0029 (8)0.0076 (9)0.0008 (10)
N510.0361 (8)0.0326 (9)0.0784 (14)0.0011 (7)0.0187 (8)0.0002 (9)
O10.0426 (9)0.0564 (10)0.0867 (13)0.0052 (7)0.0094 (10)0.0090 (9)
Geometric parameters (Å, º) top
N4—C51.320 (2)C15—N161.330 (3)
N4—C31.367 (2)C15—H150.9300
C5—N511.330 (2)N16—C171.338 (3)
C5—N11.353 (2)N16—H160.85 (2)
N1—N21.356 (2)C17—C181.349 (3)
N1—H10.876 (19)C17—H170.9300
N2—C31.302 (2)C18—H180.9300
C3—C131.456 (2)N51—H51A0.82 (2)
C13—C181.383 (2)N51—H51B0.82 (2)
C13—C141.396 (2)O1—H1A0.89 (3)
C14—C151.355 (3)O1—H1B0.88 (3)
C14—H140.9300
C5—N4—C3102.47 (14)N16—C15—C14120.89 (17)
N4—C5—N51126.56 (17)N16—C15—H15119.6
N4—C5—N1109.53 (15)C14—C15—H15119.6
N51—C5—N1123.90 (18)C15—N16—C17121.52 (18)
C5—N1—N2110.08 (15)C15—N16—H16127.1 (16)
C5—N1—H1120.6 (12)C17—N16—H16111.3 (16)
N2—N1—H1129.3 (12)N16—C17—C18120.25 (18)
C3—N2—N1102.18 (14)N16—C17—H17119.9
N2—C3—N4115.73 (16)C18—C17—H17119.9
N2—C3—C13122.53 (15)C17—C18—C13119.87 (17)
N4—C3—C13121.73 (15)C17—C18—H18120.1
C18—C13—C14118.66 (17)C13—C18—H18120.1
C18—C13—C3120.84 (15)C5—N51—H51A118.8 (15)
C14—C13—C3120.50 (16)C5—N51—H51B113.2 (17)
C15—C14—C13118.80 (17)H51A—N51—H51B125 (2)
C15—C14—H14120.6H1A—O1—H1B103 (3)
C13—C14—H14120.6
C3—N4—C5—N51179.2 (2)N2—C3—C13—C141.6 (3)
C3—N4—C5—N10.1 (2)N4—C3—C13—C14177.42 (19)
N4—C5—N1—N20.4 (2)C18—C13—C14—C150.2 (3)
N51—C5—N1—N2178.75 (19)C3—C13—C14—C15179.92 (19)
C5—N1—N2—C30.8 (2)C13—C14—C15—N160.6 (3)
N1—N2—C3—N40.9 (2)C14—C15—N16—C170.9 (3)
N1—N2—C3—C13179.91 (17)C15—N16—C17—C180.7 (3)
C5—N4—C3—N20.6 (2)N16—C17—C18—C130.3 (3)
C5—N4—C3—C13179.68 (18)C14—C13—C18—C170.0 (3)
N2—C3—C13—C18178.20 (19)C3—C13—C18—C17179.8 (2)
N4—C3—C13—C182.8 (3)
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N1—H1···O1i0.876 (19)1.97 (2)2.842 (2)175.0 (18)
N16—H16···Cl10.85 (2)2.22 (2)3.0574 (18)169 (2)
N51—H51A···Cl1ii0.82 (2)2.52 (2)3.3092 (18)160.5 (19)
N51—H51B···N4iii0.82 (2)2.15 (2)2.963 (2)174 (2)
O1—H1A···Cl1iv0.89 (3)2.29 (3)3.159 (2)167 (3)
O1—H1B···Cl1v0.88 (3)2.32 (3)3.187 (2)168 (2)
Symmetry codes: (i) x, y+1/2, z+1/2; (ii) x+1, y1/2, z+3/2; (iii) x+2, y, z+2; (iv) x, y+1, z+1; (v) x+1, y+1, z+1.

Experimental details

Crystal data
Chemical formulaC7H8N5+·Cl·H2O
Mr215.65
Crystal system, space groupMonoclinic, P21/c
Temperature (K)295
a, b, c (Å)5.3411 (5), 24.656 (3), 7.3488 (7)
β (°) 97.62 (2)
V3)959.22 (18)
Z4
Radiation typeAg Kα, λ = 0.56085 Å
µ (mm1)0.20
Crystal size (mm)0.20 × 0.20 × 0.20
Data collection
DiffractometerEnraf–Nonius CAD-4
diffractometer
Absorption correctionPart of the refinement model (ΔF)
(Walker & Stuart, 1983)
Tmin, Tmax0.314, 0.961
No. of measured, independent and
observed [I > 2σ(I)] reflections
2389, 2389, 1518
Rint0.000
(sin θ/λ)max1)0.668
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.042, 0.109, 0.93
No. of reflections2389
No. of parameters151
H-atom treatmentH atoms treated by a mixture of independent and constrained refinement
Δρmax, Δρmin (e Å3)0.26, 0.24

Computer programs: CAD-4 EXPRESS (Enraf–Nonius, 1994), XCAD4 (Harms & Wocadlo, 1995), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997), WinGX (Farrugia, 1999).

Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N1—H1···O1i0.876 (19)1.97 (2)2.842 (2)175.0 (18)
N16—H16···Cl10.85 (2)2.22 (2)3.0574 (18)169 (2)
N51—H51A···Cl1ii0.82 (2)2.52 (2)3.3092 (18)160.5 (19)
N51—H51B···N4iii0.82 (2)2.15 (2)2.963 (2)174 (2)
O1—H1A···Cl1iv0.89 (3)2.29 (3)3.159 (2)167 (3)
O1—H1B···Cl1v0.88 (3)2.32 (3)3.187 (2)168 (2)
Symmetry codes: (i) x, y+1/2, z+1/2; (ii) x+1, y1/2, z+3/2; (iii) x+2, y, z+2; (iv) x, y+1, z+1; (v) x+1, y+1, z+1.
 

Acknowledgements

This work was supported by the Ministry of Education and Science of the Russian Federation through the Federal Target Program `Research and Educational Personnel of Innovative Russia at 2009–2013 Years', State contract P1472, project NK-186P/3. The authors are indebted to the Russian Foundation for Basic Research for covering the licence fee for use of the Cambridge Structural Database (Allen, 2002[Allen, F. H. (2002). Acta Cryst. B58, 380-388.]).

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Volume 67| Part 2| February 2011| Pages o466-o467
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