SYNTHESIS AND STRUCTURES OF SOME DIETHYLTIN AND DIPHENYLTIN BISHYDROXAMATES

Diethyl- and diphenyltin derivatives of N-methyl-N-p-bromobenzoylhydro xylamine, R(2)Sn{ON(Me)C(O)C6H4Br-p}(2), R = Et, Ph, and N-p-bromophen yl-N-p-bromobenzoylhydroxylamine R(2)Sn{ON(C6H4Br-p)C(O)C6H4Br-p}(2), R = Et, Ph, were made and characterized by IR, Mossbauer and NMR(H-1, C-13, Sn-119) spectroscopy and, in the case of Et(2)Sn{ON(Me)C(O)C6H4B r-pi}(2), by an X-ray diffraction study. The geometry at the tin atom is that of a distorted trans octahedron with two bidentate, nearly equ ivalent N-acylhydroxylamine residues and a CSnC angle of 141.1 degrees . On the basis of the Mossbauer data for the diphenyltin hydroxamates, a cis-octahedral structure with bidentate ligation of the hydroxylami ne residues is suggested.