SYNTHESES AND SOLID-STATE STRUCTURES OF SOME DIALKYLTIN DERIVATIVES OF ALPHA-METHOXY-PHENYLACETIC AND ALPHA-ACETOXY-PHENYLACETIC ACIDS

Several di-n-butyltin and diethyltin biscarboxylates and distannoxanes of alpha-methoxy-and alpha-acetoxy-phenylacetic acids were synthesize d and (two of) their structures were studied by means of X-ray diffrac tion analysis as well as by means of IR and Mossbauer spectroscopies. It was shown for {[(n-Bu)(2)-SnOC(O)CH(OMe)Ph]O-2}(2) that there is an interaction between the OMe group and one of the endocyclic tin atoms , resulting in a distorted pentagonal-bipyramidal geometry with the pe ntagonal plane defined by five O atoms and an uncommon seven coordinat ion number for this tin atom, Spectral data indicate that biscarboxyla tes have trans-octahedral structures.