SYNTHESIS AND CHEMICOPHYSICAL CHARACTERIZATION OF TIN ADDUCTS WITH 2-IMIDAZOLIDONE

2-Imidazolidone (HimiO) adducts with R(2)SnCl(2) (R = Me, Bu, Ph), MeS nCl(3), SnX(4) and SnCl2, with general formulae R(2)SnCl(2)(HimiO)(2), MeSnCl(3)(HimiO)(2), SnX(4)(HimiO)(2) and SnCl2(HimiO), were prepared . The new complexes have been characterized by elemental analyses, con ductivity measurements and spectroscopic IR, Sn-119 Mossbauer, and sel ected H-1, Sn-119 and C-13 NMR studies. Crystals of Bu(2)SnCl(2)(HimiO )(2) are monoclinic, space group P2(1)/n, with a = 14.880(2), b = 16.4 19(2), c = 8.733(1) Angstrom, beta = 91.0(1)degrees, Z = 4. The crysta l consists of discrete trans-Bu(2)SnCl(2)(HimiO)(2) units, with the ti n atom octahedrally coordinated to two butyl carbons (Sn-C: 2.05(1) an d 2.13(1) Angstrom, C-Sn-C: 155.2(5)degrees), two Cl atoms (Sn-Cl: 2.4 60(3) and 2.466(3) Angstrom, Cl-Sn-Cl: 92.09(8)degrees) and two HimiO groups (Sn-O: 2.527(7) and 2.497(6) Angstrom, O-Sn-O: 86.4(2)degrees). The ligand acts as a monodentate agent with the ligated atom being th e ketonic oxygen. Monomeric distorted octahedral stereochemistries are assigned to the organotin complexes and cis-octahedral structures to the inorganic tin(IV) adducts in the solid state on the basis of spect roscopic results. The H-1 NMR data indicate that the R(2)SnCl(2)(HimiO )(2) compounds fully dissociate in DMSO-d(6) and partially in CDCl3, w hile structural retention is observed for MeSnCl(3)(HimiO)(2) in CDCl3 solution. All data are discussed in terms of the assigned structural type and of the nature of the bonding.