Soluble ruthenium carbonyl complexes containing new sterically hindered bipyridine ligands

Abstract

The synthesis, characterization and reactivity of bipyridyl ruthenium carbonyl complexes of the type Ru(NN)(CO) 2Cl 2 [where NN = 4,4′- tBu 2-2,2′-byy (bpy ∗, a); 6,6′-Me 2-4,4′- tBu 2-2,2′-bpy (dmbpy ∗, b); 6,6′-Ph 2-4,4′- tBu 2-2,2′-bpy (dpbpy ∗, c)] is reported together with the synthesis and characterization of Ru(dpphen)(CO) 2Cl 2 [where dpphen = 2,9-Ph 2-1, 10-phen, d]. When NN is bpy ∗ or dmbpy ∗, the cis-carbonyl, trans-chloro isomer is obtained, whereas when NN is dpbpy ∗ or dpphen the cis-carbonyl, cis-chloro isomer is the predominant product.