Platinum—alkynyl and —alkyne complexes: old systems with new chemical and physical perspectives

The chemistry of alkynyl and alkyne ligands in platinum complexes of different oxidation states is described. The review focuses on the synthetic aspects of mono- and polynuclear compounds and on the reactivity of σ-alkynyl and π-alkyne species in different stoichiometric reactions such as insertion, addition of nucleophiles and electrophiles, rearrangements and isomerization processes and also some catalytic additions of heteroatoms (B, Si, S) across the CC triple bond. The relevant features of polynuclear complexes bearing the CC group in dendrimers and organometallic polymers are briefly reported.