SYNTHESIS AND CHEMICOPHYSICAL CHARACTERIZATION OF TIN ADDUCTS WITH 2-IMIDAZOLIDONE

2-Imidazolidone (HimiO) adducts with R(2)SnCl(2) (R = Me, Bu, Ph), MeSnCl(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, conductivity measurements and spectroscopic IR, Sn-119 Mossbauer, and selected 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 = 16.419(2), c = 8.733(1) Angstrom, beta = 91.0(1)degrees, Z = 4. The crystal consists of discrete trans-Bu(2)SnCl(2)(HimiO)(2) units, with the tin atom octahedrally coordinated to two butyl carbons (Sn-C: 2.05(1) and 2.13(1) Angstrom, C-Sn-C: 155.2(5)degrees), two Cl atoms (Sn-Cl: 2.460(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 the 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 spectroscopic 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, while 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.