Molecular structures of pyridinethiolato complexes of Sn(II), Sn(IV), Ge(IV), and Si(IV)

• Main Authors: Wächtler Erik, Gericke Robert, Kutter Silvio, Brendler Erica, Wagler Jörg
• Format: Article
• Language: English
• Published: De Gruyter 2013-12-01
• Series: Main Group Metal Chemistry
• Subjects: ambidentate; chelate; silicon; tin; x-ray
• Online Access: https://doi.org/10.1515/mgmc-2013-0041
• ISSN: 0792-1241; 2191-0219

Complexes of Sn(II), Sn(IV), Ge(IV), and Si(IV) with the ambidentate pyridine-2-thiolato ligand (PyS-) were synthesized and characterized by multinuclear NMR spectroscopy and single-crystal X-ray diffractometry. Comparison of the structures of E(PyS)2Cl2 (E=Sn, Ge, Si) and E(PyS)4 (E=Sn, Si) allows for insights into the group 14 coordination chemistry of this ambidentate chelator in dependence of the thiophilicity of the central atom of the corresponding complex. Furthermore, the crystal structure of Sn(PyS)2 reveals two different coordination modes of its constituents, i.e., the crystal packing features cyclic dimers and polymeric chains of Sn(PyS)2. This compound was shown to undergo oxidative addition of 2,2′-dipyridyldisulfide and sulfur with the formation of Sn(PyS)4and (PyS)2Sn(μ-S)2Sn(PyS)2, respectively.