Strong Ligand Stabilization Based on π-Extension in a Series of Ruthenium Terpyridine Water Oxidation Catalysts.

ABSTRACT: The substitution behavior of the monodentate Cl ligand of a series of ruthenium(II) terpyridine complexes (terpyridine (tpy)=2,2':6',2''-terpyridine) has been investigated. ¹ H NMR kinetic experiments of the dissociation of the chloro ligand in D₂ O for the complexes [Ru(tpy)(bpy)Cl]Cl (1, bpy=2,2'-bipyridine) and [Ru(tpy)(dppz)Cl]Cl (2, dppz=dipyrido[3,2-a:2',3'-c]phenazine) as well as the binuclear complex [Ru(bpy)₂ (tpphz)Ru(tpy)Cl]Cl₃ (3 b, tpphz=tetrapyrido[3,2-a:2',3'-c:3'',2''-h:2''',3'''-j]phenazine) were conducted, showing increased stability of the chloride ligand for compounds 2 and 3 due to the extended π-system. Compounds 1-5 (4=[Ru(tbbpy)₂ (tpphz)Ru(tpy)Cl](PF₆ )₃ , 5=[Ru(bpy)₂ (tpphz)Ru(t

SUBMITTER: Amthor S 

PROVIDER: S-EPMC9299156 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature