Bivalent Organo-tin and -lead Derivatives

Bivalent Organo-tin and -lead Derivatives. Photolysis of dialkyltin(iv) oligomers at room temperature produces, via intermediate oligomeric diradicals, dialkyl-stannylenes, which insert into 8n—H, 8n—C, and 8n—8n bonds and react with dienes and carbonyl compounds. Dialkylstannylenes are also produced by the thermolysis of XR2Sn8nR2X (X = C1 or H) at 120—130 C. The stannylenes so 

Miscellaneous Studies. Kinetic studies of the oxidation of Sn by Co in perchloric acid and by Mo in hydrochloric acid have been performed, and complexation between Sn and acetate ions and between Pb and adenine, thiourea, and maleate ions has been studied. Stability constants were usually determined. A model has been proposed for the interpretation of tin-119m Mossbauer data for tin(ii) compounds in terms of the distribution of tin valence electrons. The model accounts for the positive signs of the quadrupole coupling constants observed for tin(ii) compounds, and for the variation in the Mossbauer parameters of tris(halogenato)stannate(ii) anions as the cation is changed.  

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