A Mössbauer study of some nitrogen-containing adducts of organotin(IV) chlorides

Abstract

Complexes formed between the compounds PrⁿSnCl₃, Prⁿ₂SnCl₂, and Ph_nSnCl_4–n(n= 1–3) and the Lewis bases piperidine, morpholine, β-picoline, γ-picoline, and isoquinoline have been studied by means of the Mössbauer effect. In several cases the signs of the quadrupole coupling constants, e²qQ, were determined. On this basis the complexes of Ph₃SnCl have been assigned a trigonal bipyramidal structure with C–Sn–C bond angles of ca. 120°. The adducts of Ph₂SnCl₂ and Prⁿ₂SnCl₂ with morpholine have a cis-arrangement of the organo-groups, whilst the other complexes have a trans-configuration. The nature of the bonding in these compounds and its influence on the Mössbauer parameters are also discussed.