Diorganozinn(IV)-Komplexe dreizähniger Carbazone – Strukturuntersuchungen im festen Zustand und in Lösung

Diorganotin(IV) Complexes of Tridentate Carbazones – Structural Investigations in Solid State and in Solution The structures of the products from the reaction of diphenyltin oxide with O-methyl-β-N-(salicylmethyliden)-carbazone H₂I , di-n-butyltin oxide, respectively, and neophyl-phenyl-tin oxide with 2[(2-methoxycarbonyl)-hydrazono]-propionic acid H₂II were solved with X-ray crystal-structure analyse and multinuclear NMR spectroscopy in solution. IR investigations support the statements. While Ph₂Sn-I is found as a trigonal bipyramidal coordination polyhedron we demonstrated an increased coordination number for the tin atom in n-Bu₂Sn-II and NeoPhSn-II by formation of dimers. The coordinated carboxylate oxygen atom acts as bridging donor atom with bond lengths of Sn1–O3 2,353(2) Å, Sn1–O3 a 2,579(2) Å ( n-Bu₂Sn-II ) and Sn1–O3 2,369(2) Å, Sn1–O3 a 2,721(3) Å ( NeoPhSn-II ). In addition the dimers are stabilized by intermolecular hydrogen bonds.