The Hemi-Adduct of Bis(diethyldithiocarbamato-S,S')tellurium(II) with 4,4'-Bipyridyl

In the structure of bis­(diethyldithiocarbamato-S,S′)tellurium(II)–4,4′-bipyridyl (2/1), [Te(C₅H₁₀NS₂)₂].1/2C₁₀H₈N₂, the bipyridyl molecule was found to bridge two bis(diethyldithiocarbamato)tellurium moieties centrosymmetrically, i.e. μ-(4,4′-bipyridyl-N:N′)-bis(diethyldithiocarbamato-S,S′)tellurium. The N atom of the bipyridyl is very weakly coordinated to tellurium and this is the first instance of a Te—N coordination observed in a tellurium–dithiocarbamate complex. The geometry around each Te atom is an unusual planar-pentagonal arrangement of ligands around it.