catena-Poly[[bis(pyrazine-2-carboxamide-κN 4)mercury(II)]-di-μ-bromido]
نویسندگان
چکیده
In the crystal structure of the title compound, [HgBr(2)(C(5)H(5)N(3)O)(2)](n), the Hg(II) cation is located on an inversion center and is coordinated by two N atoms from the pyrazine rings and four bridging Br(-) anions in a distorted octa-hedral geometry. The Br(-) anions bridge the Hg(II) cations with significantly different Hg-Br bond distances of 2.4775 (8) and 3.1122 (8) Å, forming polymeric chains running along the a axis. Inter-molecular N-H⋯O and N-H⋯N hydrogen bonds are effective in the stabilization of the crystal structure.
منابع مشابه
catena-Poly[[bis(pyrazine-2-carboxamide)mercury(II)]-di-μ-chlorido]
In the polymeric title compound, [HgCl(2)(C(5)H(5)N(3)O)(2)](n), the Hg(II) atom (site symmetry ) adopts a distorted trans-HgN(2)Cl(4) octa-hedral coordination geometry. In the crystal, adjacent mercury ions are bridged by pairs of chloride ions, generating infinite [100] chains, and N-H⋯O and N-H⋯(N,N) hydrogen bonds help to consolidate the packing.
متن کاملcatena-Poly[[bis(thiocyanato-κN)iron(II)]-bis(μ-dipyrazin-2-yl disulfide-κ2 N 4:N 4′)]
In the title compound, [Fe(NCS)2(C8H6N4S2)2] n , the Fe(II) cation is coordinated by two terminal N-bonded thio-cyanate anions and four bridging N:N'-bridging dipyrazin-2-yl di-sulfide ligands in an octa-hedral geometry. The Fe(II) cations are connected via bridging 4,4'-di-pyrazine ligands into chains along the b-axis direction. The asymmetric unit consists of one Fe(II) cation located on posi...
متن کاملcatena-Poly[[bis[2-(1H-1,2,4-triazol-1-yl-κN 4)pyrazine]cadmium(II)]-di-μ-thiocyanato-κ2 S:N;κ2 N:S]
The title compound, [Cd(NCS)(2)(C(6)H(5)N(5))(2)](n), is a coordination polymer with the Cd(II) centre located on a twofold rotation axis. The Cd(II) centre assumes a distorted octa-hedral geometry. The thio-cyanate anions function as bridging ligands between the Cd(II) centres, leading to a chain-like arrangement expanding along [001].
متن کاملIsotypic one-dimensional coordination polymers: catena-poly[[dichloridocadmium]-μ-5,6-bis(pyridin-2-yl)pyrazine-2,3-dicarboxylato-κ2 N 5:N 6] and catena-poly[[dichloridomercury(II)]-μ-5,6-bis(pyridin-2-yl)pyrazine-2,3-dicarboxylato-κ2 N 5:N 6]
The isotypic title one-dimensional coordination polymers, [CdCl2(C18H14N4O4)] n , (I), and [HgCl2(C18H14N4O4)] n , (II), are, respectively, the cadmium(II) and mercury(II) complexes of the dimethyl ester of 5,6-bis-(pyridin-2-yl)pyrazine-2,3-di-carb-oxy-lic acid. In both compounds, the metal ions are located on a twofold rotation axis and a second such axis bis-ects the Car-Car bonds of the pyr...
متن کاملcatena-Poly[[bis(2-chloropyrazine-κN 4)cadmium]-di-μ-thiocyanato-κ2 N:S;κ2 S:N]
Reaction of cadmium thio-cyanate with 2-chloro-pyrazine leads to the polymeric title compound, [Cd(NCS)2(C4H3ClN2)2] n . The Cd(II) cation, which is located on a center of inversion, is coordinated by two N-bonded and two S-bonded thio-cyanate anions and by two N-bonded 2-chloro-pyrazine ligands within a slightly distorted octa-hedron. The Cd(II) cations are linked into chains along the a axis ...
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عنوان ژورنال:
دوره 66 شماره
صفحات -
تاریخ انتشار 2010