Coordination polymers formed by diorganotin dichlorides with 2,5-bis(4-pyridyl)-1,3,4-thiadiazole

Dichlorodimethyltin and dichlorodiphenyltin form 1:1 adducts with 2,5-bis(4-pyridyl)-1,3,4-thiadiazole (L1). Mössbauer spectra of the compounds SnCl2(CH3)2 · L1 (1) and SnCl2(C6H5)2 · L1 · 0.3CH2Cl2 (2) are consistent with a monodimensional polymeric structure containing L1 as a bifunctional bridging ligand. The octahedral coordination geometry at the tin atom is very distorted, with a C–Sn–C bond angle of about 150° for both 1 and 2.