supplementary materials


HTML versionpdf versioncif file3d viewstructure factorssupplementary materialsCIF check reportcited insimilar papers Open access

Acta Cryst. (2008). E64, m1583-m1584    [ doi:10.1107/S1600536808038129 ]

Dibromido(di-2-pyridylamine-[kappa]2N,N')mercury(II)

K. Kalateh, A. Norouzi, A. Ebadi, R. Ahmadi and V. Amani

Abstract top

In the molecule of the title compound, [HgBr2(C10H9N3)], the HgII atom is four-coordinated in a distorted tetrahedral configuration by two N atoms from the chelating di-2-pyridylamine ligand and by two Br atoms. In the crystal structure, intermolecular N-H...Br hydrogen bonds link the molecules into centrosymmetric dimers. There are [pi]-[pi] contacts between the pyridine rings [centroid-centroid distances = 3.9662 (5) and 3.9321 (4) Å]. There also exists a C-H...[pi] contact between the pyridine CH group and a pyridine ring.

Comment top

Recently, we reported the syntheses and crystal structures of [Hg(4,4'-dmbpy) I2], (II), (Yousefi, Tadayon Pour et al., 2008), [Hg(5,5'-dmbpy)I2], (III), (Tadayon Pour, et al., 2008), [Hg(dmphen)I2], (IV), (Yousefi, Rashidi Vahid et al., 2008), {[HgCl(dm4bt)]2(µ-Cl)2}, (V), (Khavasi et al., 2008), [Hg(6-mbpy)Cl2], (VI), (Ahmadi et al., 2008) and [{HgBr(4,4'-dmbpy)}2(µ-Br)2], (VII), (Kalateh et al., 2008) [where 4,4'-dmbpy is 4,4'-dimethyl-2,2'-bipyridine, 5,5'-dmbpy is 5,5'-dimethyl-2,2'- bipyridine, 6-mbpy is 6-methyl-2,2'-bipyridine, dmphen is 4,7-diphenyl-1,10- phenanthroline and dm4bt is 2,2'-dimethyl-4,4'-bithiazole]. There are two HgII complexes, with formula, [Hg(N—N)Br2], such as [Hg(TPA)Br2], (VIII), (Xie et al., 2004) and [Hg(TPD)Br2], (IX), (Hughes et al., 1985) [where TPA is tris(2-pyridyl)amine and TPD is N,N,N',N'-Tetramethyl-o-phenylenediamine] have been synthesized and characterized by single-crystal X-ray diffraction methods. We report herein the synthesis and crystal structure of the title compound, (I).

In the title compound, (Fig. 1), the HgII atom is four-coordinated in a distorted tetrahedral configuration by two N atoms from di-2-pyridylamine and two Br atoms. The Hg-Br and Hg-N bond lengths and angles (Table 1) are within normal ranges, as in (VIII).

In the crystal structure, intermolecular N-H···Br hydrogen bonds link the molecules into centrosymmetric dimers (Fig. 2), in which they may be effective in the stabilization of the structure. The π-π contacts between the pyridine rings Cg2···Cg2i and Cg2···Cg3ii [symmetry codes: (i) x, -y, 2 - z, (ii) 1 - x,- y, 2 - z, where Cg2 and Cg3 are centroids of the rings A (N1/C1-C5) and B (N3/C6-C10), respectively] may further stabilize the structure, with centroid-centroid distances of 3.9662 (5) %A and 3.9321 (4) %A, respectively. There also exists a C—H···π contact (Table 1) between the pyridine CH group and pyridine ring.

Related literature top

For related literature, see: Ahmadi et al. (2008); Kalateh et al. (2008); Khavasi et al. (2008); Tadayon Pour et al. (2008); Yousefi, Rashidi Vahid et al. (2008); Yousefi, Tadayon Pour et al. (2008). For related structures, see: Xie et al. (2004); Hughes et al. (1985).

Experimental top

For the preparation of the title compound, (I), a solution of di-2-pyridylamine (0.25 g, 1.43 mmol) in methanol (20 ml) was added to a solution of HgBr2 (0.51 g, 1.43 mmol) in acetonitrile (20 ml) and the resulting colorless solution was stirred for 20 min at 313 K. This solution was left to evaporate slowly at room temperature. After one week, colorless prismatic crystals of the title compound were isolated (yield; 0.55 g, 72.3%).

Refinement top

H atoms were positioned geometrically, with N-H = 0.86 Å (for NH) and C-H = 0.93 Å for aromatic H and constrained to ride on their parent atoms, with Uiso(H) = 1.2Ueq(C,N). The highest and lowest peaks are located 0.69 Å and 0.78 Å from Hg1 atom, respectively.

Computing details top

Data collection: SMART (Bruker, 1998); cell refinement: SAINT (Bruker, 1998); data reduction: SAINT (Bruker, 1998); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).

Figures top
[Figure 1] Fig. 1. The molecular structure of the title molecule, with the atom-numbering scheme. Displacement ellipsoids are drawn at the 50% probability level.
[Figure 2] Fig. 2. A partial packing diagram of the title compound.
Dibromido(di-2-pyridylamine-κ2N,N')mercury(II) top
Crystal data top
[HgBr2(C10H9N3)]Z = 2
Mr = 531.59F(000) = 480
Triclinic, P1Dx = 2.820 Mg m−3
Hall symbol: -P 1Mo Kα radiation, λ = 0.71073 Å
a = 8.1284 (16) ÅCell parameters from 1657 reflections
b = 8.7645 (18) Åθ = 2.3–29.2°
c = 9.912 (2) ŵ = 18.65 mm−1
α = 113.45 (3)°T = 120 K
β = 98.41 (3)°Prism, colorless
γ = 97.79 (3)°0.40 × 0.35 × 0.25 mm
V = 626.1 (3) Å3
Data collection top
Bruker SMART CCD area-detector
diffractometer		3350 independent reflections
Radiation source: fine-focus sealed tube3234 reflections with I > 2σ(I)
graphiteRint = 0.087
φ and ω scansθmax = 29.2°, θmin = 2.3°
Absorption correction: numerical
(shape of crystal determined optically)		h = −11→11
Tmin = 0.016, Tmax = 0.080k = −11→10
7839 measured reflectionsl = −12→13
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)] = 0.053Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.140H-atom parameters constrained
S = 1.15 w = 1/[σ2(Fo2) + (0.0882P)2 + 2.3955P]
where P = (Fo2 + 2Fc2)/3
3350 reflections(Δ/σ)max = 0.059
145 parametersΔρmax = 4.33 e Å−3
0 restraintsΔρmin = −6.54 e Å−3
Crystal data top
[HgBr2(C10H9N3)]γ = 97.79 (3)°
Mr = 531.59V = 626.1 (3) Å3
Triclinic, P1Z = 2
a = 8.1284 (16) ÅMo Kα radiation
b = 8.7645 (18) ŵ = 18.65 mm−1
c = 9.912 (2) ÅT = 120 K
α = 113.45 (3)°0.40 × 0.35 × 0.25 mm
β = 98.41 (3)°
Data collection top
Bruker SMART CCD area-detector
diffractometer		3350 independent reflections
Absorption correction: numerical
(shape of crystal determined optically)		3234 reflections with I > 2σ(I)
Tmin = 0.016, Tmax = 0.080Rint = 0.087
7839 measured reflectionsθmax = 29.2°
Refinement top
R[F2 > 2σ(F2)] = 0.053H-atom parameters constrained
wR(F2) = 0.140Δρmax = 4.33 e Å−3
S = 1.15Δρmin = −6.54 e Å−3
3350 reflectionsAbsolute structure: ?
145 parametersFlack parameter: ?
0 restraintsRogers parameter: ?
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*/Ueq
Hg10.28140 (3)0.22806 (4)0.84793 (3)0.02226 (15)
Br10.03376 (10)0.29535 (11)0.71493 (10)0.0259 (2)
Br20.58403 (10)0.34148 (10)0.83842 (9)0.0219 (2)
N10.2053 (9)0.1755 (9)1.0425 (8)0.0195 (12)
N20.3018 (9)−0.0818 (8)0.9915 (8)0.0190 (12)
H2A0.3426−0.13621.03950.023*
N30.3006 (9)−0.0591 (8)0.7601 (8)0.0192 (12)
C10.1347 (11)0.2988 (10)1.1369 (11)0.0239 (15)
H10.10980.38451.10960.029*
C20.0991 (11)0.3023 (11)1.2678 (11)0.0248 (16)
H20.05160.38811.32880.030*
C30.1363 (11)0.1728 (11)1.3080 (10)0.0247 (15)
H30.11510.17271.39770.030*
C40.2037 (11)0.0462 (11)1.2157 (10)0.0225 (14)
H40.2279−0.04121.24070.027*
C50.2355 (9)0.0519 (10)1.0815 (9)0.0178 (13)
C60.3175 (9)−0.1477 (10)0.8430 (9)0.0172 (13)
C70.3535 (10)−0.3113 (10)0.7834 (10)0.0215 (14)
H70.3679−0.36930.84370.026*
C80.3671 (11)−0.3850 (11)0.6355 (10)0.0249 (15)
H80.3886−0.49400.59440.030*
C90.3485 (12)−0.2952 (11)0.5481 (10)0.0262 (16)
H90.3575−0.34140.44790.031*
C100.3158 (11)−0.1340 (12)0.6165 (10)0.0248 (16)
H100.3034−0.07310.55870.030*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Hg10.0242 (2)0.0212 (2)0.0290 (2)0.00845 (13)0.00573 (13)0.01720 (14)
Br10.0239 (4)0.0253 (4)0.0341 (4)0.0070 (3)0.0012 (3)0.0194 (3)
Br20.0237 (4)0.0208 (4)0.0267 (4)0.0057 (3)0.0061 (3)0.0151 (3)
N10.023 (3)0.016 (3)0.019 (3)0.006 (2)0.001 (2)0.008 (2)
N20.026 (3)0.015 (3)0.022 (3)0.007 (2)0.004 (2)0.013 (2)
N30.024 (3)0.016 (3)0.018 (3)0.005 (2)0.002 (2)0.009 (2)
C10.025 (4)0.015 (3)0.032 (4)0.005 (3)0.003 (3)0.011 (3)
C20.024 (3)0.020 (3)0.030 (4)0.007 (3)0.007 (3)0.009 (3)
C30.029 (4)0.024 (4)0.022 (3)0.006 (3)0.009 (3)0.010 (3)
C40.026 (3)0.021 (3)0.024 (4)0.005 (3)0.003 (3)0.012 (3)
C50.014 (3)0.017 (3)0.020 (3)0.001 (2)0.002 (2)0.007 (3)
C60.013 (3)0.016 (3)0.020 (3)−0.002 (2)−0.002 (2)0.009 (3)
C70.024 (3)0.017 (3)0.024 (4)0.004 (3)0.004 (3)0.010 (3)
C80.027 (4)0.022 (4)0.023 (4)0.005 (3)0.002 (3)0.008 (3)
C90.037 (4)0.021 (4)0.017 (3)0.005 (3)0.003 (3)0.006 (3)
C100.030 (4)0.029 (4)0.020 (3)0.008 (3)0.004 (3)0.015 (3)
Geometric parameters (Å, °) top
Br1—Hg12.5106 (11)C5—N11.327 (10)
Br2—Hg12.5549 (11)C5—N21.393 (10)
N1—Hg12.301 (7)C6—N31.342 (10)
N2—H2A0.8600C6—N21.384 (10)
N3—Hg12.350 (7)C6—C71.408 (11)
C1—C21.360 (13)C7—C81.376 (12)
C1—N11.376 (11)C7—H70.9300
C1—H10.9300C8—C91.389 (13)
C2—C31.398 (13)C8—H80.9300
C2—H20.9300C9—C101.385 (12)
C3—C41.368 (12)C9—H90.9300
C3—H30.9300C10—N31.342 (11)
C4—C51.410 (11)C10—H100.9300
C4—H40.9300
N1—Hg1—N381.1 (2)C2—C3—H3119.9
N1—Hg1—Br1109.13 (17)C3—C4—C5118.2 (8)
N3—Hg1—Br1117.16 (17)C3—C4—H4120.9
N1—Hg1—Br2125.41 (17)C5—C4—H4120.9
N3—Hg1—Br296.23 (18)N1—C5—N2121.7 (7)
Br1—Hg1—Br2119.68 (3)N1—C5—C4122.9 (7)
C1—N1—Hg1114.3 (5)N2—C5—C4115.4 (7)
C5—N1—Hg1128.2 (6)N3—C6—N2121.6 (7)
C5—N1—C1117.2 (7)N3—C6—C7121.6 (7)
C6—N2—C5135.0 (7)N2—C6—C7116.9 (7)
C6—N2—H2A112.5C8—C7—C6119.6 (8)
C5—N2—H2A112.5C8—C7—H7120.2
C6—N3—Hg1126.5 (5)C6—C7—H7120.2
C10—N3—Hg1115.6 (6)C7—C8—C9119.4 (8)
C10—N3—C6117.4 (7)C7—C8—H8120.3
C2—C1—N1123.6 (8)C9—C8—H8120.3
C2—C1—H1118.1C8—C9—C10117.2 (8)
N1—C1—H1118.3C8—C9—H9121.4
C1—C2—C3117.9 (8)C10—C9—H9121.4
C1—C2—H2121.0N3—C10—C9124.8 (8)
C3—C2—H2121.1N3—C10—H10117.5
C4—C3—C2120.2 (8)C9—C10—H10117.7
C4—C3—H3120.0
C1—N1—Hg1—N3−166.6 (6)C6—C7—C8—C91.3 (12)
C5—N1—Hg1—N320.2 (6)C7—C8—C9—C10−0.3 (13)
C1—N1—Hg1—Br1−50.8 (6)C8—C9—C10—N3−0.1 (14)
C5—N1—Hg1—Br1136.0 (6)N2—C5—N1—C1178.0 (7)
C1—N1—Hg1—Br2102.0 (5)C4—C5—N1—C1−2.2 (11)
C5—N1—Hg1—Br2−71.1 (7)N2—C5—N1—Hg1−9.0 (10)
C10—N3—Hg1—N1168.0 (6)C4—C5—N1—Hg1170.8 (6)
C6—N3—Hg1—N1−20.2 (6)C2—C1—N1—C51.8 (12)
C6—N3—Hg1—Br1−127.2 (6)C2—C1—N1—Hg1−172.2 (7)
C10—N3—Hg1—Br161.0 (6)N3—C6—N2—C516.3 (13)
C6—N3—Hg1—Br2104.8 (6)C7—C6—N2—C5−164.2 (8)
C10—N3—Hg1—Br2−67.0 (6)N1—C5—N2—C6−16.8 (13)
N1—C1—C2—C3−0.2 (13)C4—C5—N2—C6163.3 (8)
C1—C2—C3—C4−1.0 (13)C9—C10—N3—C6−0.4 (13)
C2—C3—C4—C50.6 (12)C9—C10—N3—Hg1172.2 (7)
C3—C4—C5—N11.0 (12)N2—C6—N3—C10−179.2 (7)
C3—C4—C5—N2−179.1 (7)C7—C6—N3—C101.4 (11)
N3—C6—C7—C8−1.8 (11)N2—C6—N3—Hg19.2 (10)
N2—C6—C7—C8178.7 (7)C7—C6—N3—Hg1−170.3 (5)
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
N2—H2A···Br2i0.862.623.472 (3)170
C2—H2···Cg3ii0.933.203.587 (3)107
Symmetry codes: (i) −x+1, −y, −z+2; (ii) −x+2, −y, −z.
Table 1
Selected geometric parameters (Å, °) top
Br1—Hg12.5106 (11)N1—Hg12.301 (7)
Br2—Hg12.5549 (11)N3—Hg12.350 (7)
N1—Hg1—N381.1 (2)N1—Hg1—Br2125.41 (17)
N1—Hg1—Br1109.13 (17)N3—Hg1—Br296.23 (18)
N3—Hg1—Br1117.16 (17)Br1—Hg1—Br2119.68 (3)
Table 2
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
N2—H2A···Br2i0.862.623.472 (3)170
C2—H2···Cg3ii0.933.203.587 (3)107
Symmetry codes: (i) −x+1, −y, −z+2; (ii) −x+2, −y, −z.
Acknowledgements top

We are grateful to the Islamic Azad University, Shahr-e-Rey Branch, for financial support.

references
References top

Ahmadi, R., Ebadi, A., Kalateh, K., Norouzi, A. & Amani, V. (2008). Acta Cryst. E64, m1407.

Bruker (1998). SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.

Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565.

Farrugia, L. J. (1999). J. Appl. Cryst. 32, 837–838.

Hughes, C. M., Favas, M. C., Skelton, B. W. & White, A. H. (1985). Aust. J. Chem. 38, 1521–1527.

Kalateh, K., Ebadi, A., Ahmadi, R., Amani, V. & Khavasi, H. R. (2008). Acta Cryst. E64, m1397–m1398.

Khavasi, H. R., Abedi, A., Amani, V., Notash, B. & Safari, N. (2008). Polyhedron, 27, 1848–1854.

Sheldrick, G. M. (1998). SADABS. Bruker AXS Inc., Madison, Wisconsin, USA. Not mentioned anywhere in CIF; omit here?

Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122.

Tadayon Pour, N., Ebadi, A., Abedi, A., Amani, V. & Khavasid, H. R. (2008). Acta Cryst. E64, m1305.

Xie, Y., Ni, J., Jiang, H. & Liu, Q. (2004). J. Mol. Struct. 687, 73–78.

Yousefi, M., Rashidi Vahid, R., Amani, V., Arab Chamjangali, M. & Khavasi, H. R. (2008). Acta Cryst. E64, m1339–m1340.

Yousefi, M., Tadayon Pour, N., Amani, V. & Khavasi, H. R. (2008). Acta Cryst. E64, m1259.