Synthesis, molecular structure and stereoisomerization of 2-phosphinyl and 2-phosphonylethyl diorganotin halides

摘要: Abstract Functionally substituted triorganotin halides V–IX of type R 2 Sn(X)(CH ) P(O)PhR′ (R = Me, t-Bu; Rt OEt, X Cl, Br) have been synthesized by halogen cleavage the corresponding tetraorganotin compounds Sn(CH Me or Ph), I–IV. The solid state structure Sn (Br) (CH P(O)PhBu-t (IX), determined X-ray diffraction, shows a distorted trigonal-bipyramidal at tin atom, with intramolecular coordination PO group. Spectroscopic data are in agreement such solution for V–IX. Upon varying temperature, concentration solvent solutions stereoisomerization is observed. On basis NMR 1 H, 13 C, 31 P, 119 Sn), IR and conductivity studies, it suggested that this involves hexacoordinated transition atom.