On the versatility of the Hg(SePh)2 species: Synthesis and structural characterization of bimetallic (PhSe)Hg(μ)M (μ = SCN−; M = Co, Ni) polymeric chains

Abstract

Hg(SePh)2 react with Hg[Co(SCN)4] and Hg[Ni(SCN)4]·2H2O in dimethylformamide (DMF) to give the new polymeric clusters [(DMF)2Co(NCS)4(HgSePh)2]n and [(DMF)2Ni(NCS)4(HgSePh)2]n. Both species attain in a polymeric, two-dimensional network, tetrahedral HgIISe2(SCN)2 and octahedral MII(DMF)2(NCS)4 (M=Co, Ni) chains linked through SCN bridges. Although Hg and Co/Ni are not directly bound, the thiocyanato bridges act as their “extensions”, providing the adequate geometry for their linkages. A comparative discussion relating to previously obtained species is also presented.