First functionalized diorganotin (IV) derivative containing the imidobis(diphenylselenophosphinate-Se,Se') ligand. The synthesis and X-ray crystal structures of Bu2Sn[{N(SePPh2)(2)-Se,Se'}(2)] and Ph2ClSn[N(SePPh2)(2)-Se,Se'].H2O

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Authors	FLORES SANTOS L. CEA OLIVARES R. HERNANDEZ ORTEGA S. TOSCANO RA GARCIA MONTALVO V. NOVOSAD J. WOOLLINS JD
Year of publication	1997
Type	Article in Periodical
Magazine / Source	J. Organomet. Chem.
MU Faculty or unit	Faculty of Science
Citation
Field	Inorganic chemistry
Keywords	MOLECULAR-STRUCTURE; ORGANOTIN CARBOXYLATES; CHEMISTRY; COMPLEXES; ACID
Description	Reaction of the appropriate R2SnCl2 with the potassium salt of the imidobis(diphenylselenophosphinate-Se,Se') ligand (1c) in 1:2 stoichiometry yields n-Bu2Sn[{N(SePPh2}(2)-Se,Se')(2)] (2) and Ph2ClSn[N(SePPh2)(2)-Se,Se']. H2O (3). The crystal and the molecular structures of both compounds were determined by X-ray diffractometry. The core geometry in compound 2 is a quasi perfect octahedron. Two selenide ligands are coordinated symmetrically to the tin atom forming a spiro-bicyclic NP2Se2SnSe2P2N system [Sigma(Se-Sn-Se) = 360 degrees]. Both organo substituents are in trans positions [(C'-Sn-C'A) = 180.0(1)degrees] and they are almost perpendicular to the SnSe4 plane. In derivative 3 only one selenium-based ligand is coordinated asymmetrically to the tin atom and unexpectedly a chlorine atom remains attached to the metal center. The geometry around the tin atom corresponds to a distorted trigonal bipyramid with the Se(1) and Cl atoms at the axial positions.
Related projects:	Structure and character of bonding, properties and analysis of synthetic and natural molecular ensembles