Mono- and Bis-(2,2'-bipyridine) and -(1,10-phenanthroline) Chelates of Ruthenium and Osmium. II. Bischelates of Bivalent and Tervalent Ruthenium

Abstract

Bis(phenanthro1ine) and bis(bipyridine)ruthenium(~~) chelates have been prepared by the pyrolysis, at 300°C, of phenanthrolinium tetrachlorophenanthrolineruthenate(III) and bipyridinium tetrachlorobipyridineruthenate(III). In the complexes [RuB₂Cl₂] the chelating base molecules are firmly bound but the chlorine atoms are replaceable by a variety of ligands such as water, pyridine, or acetylacetone. The complexes are spin-paired and show no tendency to disproportionation to the tris complexes, under normal experimental conditions.