Synthesis of Metallacycles by Oxidative Addition of Sn−S, Sn−Se, Sn−Te, and Ge−Te Containing Precursors to Platinum(II)
作者:Michael C. Janzen、Hilary A. Jenkins、Louis M. Rendina、Jagadese J. Vittal、Richard J. Puddephatt
DOI:10.1021/ic980862p
日期:1999.5.1
metallacycles complexes can undergo exchange of either the R(2)Sn or the E groups by reaction with [(R'(2)SnE)(3)] or [(R(2)SnE')(3)], respectively, to give the corresponding new metallacycles of general formula [PtMe(2)(R(2)SnE-R'(2)SnE)(bu(2)bpy)] or [PtMe(2)(R(2)SnE-R(2)SnE')(bu(2)bpy)]. The isostructural series of complexes [PtMe(2)(Ph(2)SnE)(2)(bu(2)bpy)] with E = S, Se, and Te have been characterized
coordination of the metal atoms [dPbS 2.491 Å (dSnS 2.401 Å, dPbC 2.19 Å (dSnC 2.129 Å)]. No additional intermolecular contacts have been found. A ring-segmentexchangereaction in solution has been observed by NMR. In the resulting equilibrium new cyclic compounds containing both tin and lead atoms with coupling constants 2J(207PbS119Sn) 226 Hz have been detected. FD-mass spectra indicate formation