Synthesis, structural and spectral studies of five- and six-coordinate adducts of organotin(IV) halides containing dibenzylsulfoxide (dbso) as ligand. The crystal structures of fac-[MeSnCl3(dbso)2] and trans-[Ph2SnCl2(dbso)2]
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Data
2009
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Resumo
The reaction of the ambidentate ligand dibenzylsulfoxide (dbso) with Me2SnCl2 in 1:1 molar
ratio leads to the formation of the five-coordinate adduct [Me2SnCl2(dbso)], whereas the same
reaction conditions with Ph2SnCl2 provide the six-coordinate adduct trans-[Ph2SnCl2(dbso)2].
On the other hand, the reaction with nBu2SnCl2 forms the dimeric adduct [{nBu2SnCl2(dbso)}2],
which probably possesses octahedral tin(IV) nuclei and bridging chlorides. The adducts
[MeSnCl3(dbso)2] and [Ph3SnCl(dbso)] were also prepared and included in the study. All complexes
were studied by microanalysis and IR, NMR (1H, 13C and 119Sn) and Mössbauer spectroscopies
to investigate their structural properties. The six-coordinate species fac-[MeSnCl3(dbso)2] and
trans-[Ph2SnCl2(dbso)2] were also studied by single crystal X-ray diffractometry. These compounds
crystallize in the orthorhombic, Pbcn, and monoclinic space group P21/c, respectively, as discrete
neutral molecules with the tin(IV) atom in a distorted octahedral geometry and the two dbso ligands
in cis and trans positions, respectively.
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Sulfoxide complexes, Organotin(IV) complexes, Crystal structure analyses
Citação
SOUSA, Gerimário F. de; SABINO, José R.; FILGUEIRAS, Carlos A. L.; VENCATO, Ivo; ARDISSON, J. D. Synthesis, structural and spectral studies of five- and six-Coordinate adducts of organotin(IV) halides containing dibenzylsulfoxide (dbso) as ligand. The crystal structures of fac-[MeSnCl3(dbso)2] and trans-[Ph2SnCl2(dbso)2]. Journal of the Brazilian Chemical Society, Campinas, v. 20, n. 8, p. 1425-1433, 2009.