Synthesis and characterization of non-bridging mono- and bis-sigma-eta(1)-alkynyl derivatives of the phosphido-bridged hexaplatinum core [Pt-6(mu-PBu2t)(4)(CO)(4)](2+)

摘要

Several mono- or bis-alkynyl derivatives of general formula Pt-6(mu-PBu2t)(4)(CO)(4)X(C equivalent to C-R), Pt-6(mu-PBu2t)(4)(CO)(4)(CuC-R)(2) or Pt-6(mu-PBu2t)(4)(CO)(4)(C equivalent to C-R)(C equivalent to C-R') were obtained under Sonogashira type conditions. The new clusters have been characterized with microanalysis and using IR and multinuclear NMR spectroscopy. The crystal and molecular structures of Pt-6(mu-PBu2t)(4)(CO)(4)(C equivalent to C-R)(2) (R = H, C6H4-4-n-C5H11) are presented and electrochemical and spectroelectrochemical studies of some representative compounds are also reported.