Tuning the sulfur–heterometal interaction in organolead(IV) complexes of [Pt2(μ-S)2(PPh3)4]
作者:Kristina Pham、William Henderson、Brian K. Nicholson、T.S. Andy Hor
DOI:10.1016/j.jorganchem.2007.07.010
日期:2007.10
centre with the Pt2S2} metalloligand core can be tuned by variation of the heteroatom substituents. The species [Pt2(μ-S)2(PPh3)4PbR3]+ display differing fragmentation pathways in their ESI mass spectra, following initial loss of PPh3 in all cases; for R = Ph, loss of PbPh2 occurs, yielding [Pt2(μ-S)2(PPh3)3Ph]+, while for R = Me, reductive elimination of ethane gives [Pt2(μ-S)2(PPh3)3PbMe]+, which
[PT的反应2(μ-S)2(PPH 3)4 ]的Ph 3 PBCL中,Ph 2碘化铅2中,Ph 2 PbBr 2和Me 3 PbOAc导致形成亮黄色的含有阳离子橙色溶液[铂2(μ-S)2(PPH 3)4 PBR 3 ] +(R 3 =苯基3中,Ph 2我中,Ph 2溴中,Me 3)分离为PF 6 -或BPH 4-盐。在Me 3 Pb和Et 3 Pb体系中,延长的反应时间导致形成烷基化物质[Pt 2(μ-S)(μ-SR)(PPh 3)4 ] +(R = Me,等等)。已经对[Pt 2(μ-S)2(PPh 3)4 PbMe 3 ] PF 6和[Pt 2(μ-S)2(PPh 3)4 PbPh 2 I] PF 6进行了X射线结构测定。,揭示了不同的协调模式。在我3Pb络合物中,(四个配位的)铅原子与一个硫原子结合,而在Ph 2 PbI加合物中,两个硫的配位导致一个五个配位的铅中心。这些差异与铅中