Syntheses, Characterization and Crystal Structures of Diorganotin(IV) Selenites: 1D Helical Double-Chain Containing Eight-Membered Sn2O4Se2 Inorganic Ring

Three new diorganotin(IV) selenites, [Bu2Sn(O2SeC6H5OMe)(2)](n) (1), [Me2Sn(O2SeC6H4CHMe2)(2)](n) (2), [Me2Sn(O2SeC6H4Et)(2)](n) (3) have been synthesized and structurally characterized by elemental analysis, FT-IR, NMR (H-1, C-13 and Sn-119) spectra, TGA, and X-ray crystallography. The X-ray reveals that complexes 1-3 are 1D infinite double-chain polymers. The molecular of complex 1 is further linked by intermolecular C-H center dot center dot center dot O interactions to form a 2D network polymer. Complex 3 is linked by C-H center dot center dot center dot O interactions to form a 3D organotin framework.