6533b7dafe1ef96bd126f46a

RESEARCH PRODUCT

Studies on adducts of organotin(IV) halides with bis(acetylacetone)ethylenediimine

subject

description

The solid state configuration of 1/1 adducts, formed by mono-, di- and tri-organotin(IV) halides with the potentially tetradentate ligand bis(acetylacetone)ethylenediimine, has been investigated. The infrared spectra suggest that the neutral ligand coordinates SnIV through N (or O) atoms of the H-bonded acetylacetoneimine moieties. The skeletal vibrations associated to Sn-C and Sn-Cl bonds are consistent with square planar configurations of the organotin(IV) halide moieties, where SnCl3 and C3Sn groups would be T-shaped, and Alk2SnCl2 would have trans-dialkyl, trans-dichloro arrangements. The latter configuration is supported by the magnitude of the quadrupole splittings. Measurements of the temperature dependence of the Debye-Waller factor, as obtained by Mossbauer spectroscopy for the (CH3)3SnCl adduct, indicate a polymeric structure. An octahedral type configuration is then proposed, in which the planar organotin(IV) halide moieties are bridged by the ligand, axially coordinating tin(IV).