Derivatives of divalent germanium, tin, and lead. Part I. The protolysis of cyclopentadienyltin(II) compounds by hydroxy-derivatives. Tin(II) oximes and hydroxylpmines

Abstract

Tin(II) dimethoxide, tin(II) diacetate, and the tin(II) derivatives of oximes and hydroxylamines are prepared by the protolysis of the tin(II)–carbon bonds of cyclopentadienyltin(II) compounds, and the tin-119m Mössbauer data reported. The structures of tin(II)–oxygen bonded compounds are discussed. Two main classes appear to exist: (i) those with strong intermolecular association, high thermal stability, and insolubility, which have isomer shifts in the range 2·91–3·13 mm s^–1, and (ii) those which exhibit solubility in organic solvents, and are only weakly associated, which have isomer shifts in excess of 3·15 mm s^–1, usually in the range 3·20–3·40 mm s^–1. Tin(II) cyanide and some tin(II)–nitrogen bonded compounds are prepared similarly. With cyclopentadienyltricarbonyltungsten hydride, a rapid autopolymerisation takes place forming a tin(IV)–tungsten bonded oligomer.