Platinum(II) alkynyl complexes containing N- and S-propargylated ligands: Synthesis, structures and formation of PtII/AgI coordination compounds

Abstract

9 pages, 2 tables, 8 figures, 5 schemes.Alkylation of 2-hydroxypyridine, 2-pyridinethiol, 2-hydroxy-4-methylquinoline, phthalimide and pyrazole with propargyl bromide gave a series of alkynes in high yield. These alkynes were reacted with the chloroplatinum(II) compounds trans-[PtCl2(PPh3)2] and cis-[PtCl2(dppe)] to afford the respective trans- and cis-bis(alkynyl)platinum(II) complexes, which were characterised by spectroscopic analysis and by X-ray diffraction. The platinum(II) complexes containing the thiopyridyl- and pyrazolyl-substituted alkynes react with 1 or 2 equiv. of [Ag(NO3)(PPh3)] to give dimetallic PtII/AgI complexes.We wish to thank the Spanish Ministry for Education and Science, Junta de Castilla y León as well as the University of Burgos for generous financial support (grant numbers BQU2005-0899, BU033A06 and 112-541A-487.01).Peer reviewe