INTERACTION BETWEEN THE NO-DONOR LIGANDS IN INOLINOLATO)NITROSYL(8-QUINOLINOLATO)RUTHENIUM(II) COMPLEXES( LIGAND AND TRANS PI)

The reaction of [RuCl3(2mqn)NO](-) (2mqn is 2-methyl-8-quinolinolato l igand whose phenolate oxygen is trans to the NO) with an excess of 8-q uinolinol (Hqn) and the reaction of [RuCl3(qn)NO](-) (phenolate oxygen in the qn is trans to the NO) with an excess of 2-methyl-8-quinolinol give [RuCl(2mqn)(qn)NO] (1) as a major product, in which oxygen of th e 2mqn is trans to the NO and the configuration of the ligating nitrog en atoms of the qn and 2mqn is trans(N,N). The methyl group in the 2-p osition of qn causes the oxygen in the 2mqn to coordinate predominantl y in the trans position to the NO+ ligand. (C) 1998 Elsevier Science S .A.