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Synthesis and X‐ray Structures of Tin( IV ) and Lead( II ) Complexes with Heterocyclic Thiones
Author(s) -
SousaPedrares Antonio,
Casanova María I.,
GarcíaVázquez José A.,
Durán María L.,
Romero Jaime,
Sousa Antonio,
Silver Jack,
Titler Philip J.
Publication year - 2003
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200390094
Subject(s) - chemistry , denticity , tin , crystallography , ligand (biochemistry) , coordination geometry , octahedral molecular geometry , trigonal bipyramidal molecular geometry , trifluoromethyl , pyridine , pentagonal bipyramidal molecular geometry , crystal structure , stereochemistry , molecule , medicinal chemistry , hydrogen bond , organic chemistry , alkyl , biochemistry , receptor
Tin( IV ) and lead( II ) complexes of 3‐(trifluoromethyl)pyridine‐2‐thione (3‐CF 3 ‐pySH) and 5‐(trifluoromethyl)pyridine‐2‐thione (5‐CF 3 ‐pySH) have been synthesised. The compounds [Sn(3‐CF 3 ‐pyS) 4 ] (1), [Sn(5‐CF 3 ‐pyS) 4 ] (2), [Pb(3‐CF 3 ‐pyS) 2 ] (3), and [Pb(5‐CF 3 ‐pyS) 2 ] (4) were obtained by addition of the appropriate ligand to a methanol solution of tin( II ) chloride or lead acetate in the presence of triethylamine. The complex [Sn(5‐CF 3 ‐pyS) 4 ] was also prepared by electrochemical oxidation of a tin anode in a cell containing an acetonitrile solution of the ligand 5‐(trifluoromethyl)pyridine‐2‐thione. The X‐ray crystal structure of [Sn(3‐CF 3 ‐pyS) 4 ] reveals a dodecahedral coordination geometry around Sn IV , with the four thionate ligands acting in a bidentate (N,S) manner. [Sn(5‐CF 3 ‐pyS) 4 ] also consists of monomeric neutral molecules with the tin( IV ) atom in an octahedral geometry with two bidentate (N,S) ligands and two monodentate S ligands. The molecular structure of [Pb(3‐CF 3 ‐pyS) 2 ] shows the metal in a five‐coordinate geometry with the stereochemically active lead( II ) lone pair in an equatorial position of a trigonal bipyramid. Spectroscopic data for the complexes (IR, NMR, FAB, and Mössbauer spectra) are discussed and related to the structural information. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)