Functionalised tetraarylstannanes Sn[C6H4-R]4 (R=–CH(CH2O)2, –CHO, –COOH, –CHN–NH–C6H3-2,4-(NO2)2, –CH2OH, –CO–NH–CH2–COO–CH3, –CH[N(C2H4)2O]2)

Reaction of tin tetrachloride with the appropriate Grignard reagent gave Sn[C6H4–CH(OCH2)2]4 (2), which was transformed to Sn[C6H4–CHO]4 (3) and its hydrazido and amino derivatives Sn[C6H4–CHN–NH–C6H3-2,4-(NO2)2]4 (5) and Sn{C6H4–CH[N(C2H4)2O]2}4 (8). Oxidation of (3) produced Sn[C6H4–COOH]4 (4) while reduction of (3) gave Sn[C6H4–CH2–OH]4 (6). From the acid 4, an amino acid Sn[C6H4–CO–NH–CH2–CO–OCH3]4 (7) could be obtained by reaction with the methyl ester of glycine. All compounds were isolated in pure form with yields of 40–64% and were characterised by spectroscopic means (heteronuclear NMR) or by X-ray structure determination (3).