Platinum complexes of some deprotonatable tridentate ligands

Abstract

Platinum(11) and platinum(IV) complexes of 1,3-bis(2'-pyridyl)-1,2-diazaprop-2-ene and ligands of similar structure, but with methyl "blocking groups" adjacent to the pyridine nitrogen atoms, have been studied. In neutral solution these ligands lose a proton upon interaction with either platinum(11) or platinum(1V) salts to yield highly coloured complexes soluble in organic solvents. Protonated compounds of both oxidation states can be obtained, but such compounds are unstable in neutral solution and readily yield deprotonated complexes.