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 (¹H, ¹³C and ¹¹⁹Sn) 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···O interactions to form a 2D network polymer. Complex 3 is linked by C–H···O interactions to form a 3D organotin framework.