Abstract
The 18-membered stereoregular diphenyltin macrocycles: {Ph 2Sn[S(C 6H 3NO)O]} 3 ( 8), {Ph 2Sn[S(C 6H 3NO)O]} 3·2.67H 2O ( 9) and {Ph 2Sn[S(C 6H 3NO)O]} 3·4C 6H 6 ( 10) have been synthesized by the reaction of diphenyltin dichloride with 2-mercaptonicotinic acid. The three complexes were characterized by elemental, IR, 1H-NMR analyses. The X-ray crystallography analyses of 9 and 10 were also given. Single crystal X-ray diffraction data reveal that both 9 and 10 are highly symmetrical tri-nuclear cyclic complexes with the ligand 2-mercaptonicotinic acid bridging the adjacent tin atoms. The tin environment is distorted cis-trigonal bipyramid. Weak interaction Sn⋯O was recognized between tin and exocyclic-oxygen atoms. The potential tridentate of endocyclic sulfur atoms make them interesting ligands.
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