6533b862fe1ef96bd12c6148

RESEARCH PRODUCT

Mono-organotin(IV) and tin(IV) derivatives of 2-mercaptopyridine and 2-mercaptopyrimidine: X-ray structures of methyl-tris(2-pyridinethiolato)tin(IV) and phenyl-tris(2-pyridinethiolato)tin(IV)�1.5CHCl3

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Mono-organotin(IV) and tin(IV) derivatives of 2-mercaptopyridine (HSPy) and 2-mercaptopyrimidine (HSPym), RSnL 3 (R=Me, n-Bu, Ph; L=SPy, SPym; R=Bz=benzyl, o-CIBz, oClC 6 H 4 , p-ClC 6 H 4 , o-tolyl, p-tolyl; L=SPy), RSnCIL 2 (R=Me, n-Bu, Ph; L=SPy, SPym), RSnCI 2 L (R=Me, n-Bu; L=SPy, SPym) and SnCI 4-n L n (L=SPy, SPym; n=2,4) were obtained from RSnCI 3 or SnCI 4 and NaL or by neutralization (R=Ph,p-tolyl; L=SPy, SPym). RSnCIL 2 and RSnCI 2 L were better prepared by comproportionation of RSnCI 3 and RSnL 3 . MeSn(Spy) 3 and PhSn(SPy) 3 .1.5CHCI 3 crystals, as determined by single-crystal X-ray diffraction, are monoclinic. In the discrete monomeric RSn(SPy) 3 units, three bidentate SPy ligands together with R form a distorted pentagonal bipyramid around tin. One S and the C(R) atom are in the axial positions. Two S atoms and three N atoms form the pentagonal plane. From 119 Sn Mossbauer and IR data, analogous structures are inferred for the other solid RSnL 3 compounds, except for R=Bz, o-CIBz, o-CIC 6 H 4 and o-tolyl, in which tin would be hexacoordinated. In the compounds RSnCIL 2 and RSnCI 2 L, tin is at the center of an octahedron or a trigonal bipyramid, respectively. For Sn(SPym) 4 and SnCI 2 (SPym) 2 , the same type of octahedral structure as was previously found for Sn(Spy) 4 .HSPy and SnCI 2 (Spy) 2 is proposed. According to IR and 1 H, 13 C and 119 Sn NMR data, the solid-state molecular structures are retained in chloroform and dimethyl sulfoxide solution.