Heterobimetallic platinum–copper and platinum–silver transition metal complexes based on cis-[Pt](CCPh)2: an overview

The reaction of cis-[Pt](CCPh)2 {[Pt]=(bipy)Pt, (bipy′)Pt; bipy=2,2′-bipyridine, bipy′=4,4′-dimethyl-2,2′-bipyridine} with different copper(I) and silver(I) salts [M′X] (M′=Cu, Ag; X=inorganic or organic ligand) produces alkynyl-bridged (hetero)bi-, tri-, tetra- or pentametallic transition metal complexes. The structural aspects and reaction chemistry of such species and the preference for one coordination mode over another is discussed. The interconversion and mechanistical aspects in the formation of the latter complexes is also reported.