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catena-Poly[[dichloridodimethyl­tin(IV)]-μ-5-methyl­pyrazine-2-carboxyl­ato-κ3O:O′,N-[dimethyl­tin(IV)]]-μ-5-methyl­pyrazine-2-carboxyl­ato-κ3O,N:O′]

✍ Scribed by Li, Jun-Ying ;Li, Tian-Duo

Publisher
International Union of Crystallography
Year
2007
Tongue
English
Weight
244 KB
Volume
63
Category
Article
ISSN
1600-5368

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✦ Synopsis

The title compound, [Sn~2~Cl~2~(CH~3~)~4~(C~6~H~5~N~2~O~2~)~2~], forms infinite one-dimensional zigzag chains that propagate in a helical fashion along the c axis via an Sn—O=C—O—Sn—O bridge which involves the carboxylate groups of two methylpyrazinecarboxylate ligands. These display both chelating and bridging coordination behaviour. The asymmetric unit contains two Sn atoms; one adopts a distorted trigonal–bipyramidal geometry, while the other is in a distorted pentagonal–bipyramidal configuration.

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In the title complex, [Zn(C~6~H~5~N~2~O~2~)~2~(H~2~O)~2~], the Zn^2+^ cation lies on an inversion centre and the coordination geometry is distorted octahedral, with two N atoms and two O atoms from the 5-methylpyrazine-2-carboxylate ligand in the equatorial plane. The two remaining coordination site