Equilibria in complexes of N-heterocyclic molecules. Part 18. A covalently hydrated iridium(III) complex, bis(2,2′-bipyridyl)(2,2′-bipyridyl–water)iridium(III) trichloride trihydrate

Abstract

The compound Ir(bipy)₃Cl₃·4H₂O which had been previously suggested to contain a unidentate bipy ligand has now been shown by ¹H n.m.r. spectroscopy to contain the covalently hydrated complex cation [Ir(bipy)₂(bipy·H₂O)]³⁺. The site of attack at the pyridyl ring is discussed, as is the synthesis of several related iridium(III) complexes.