Soluble ruthenium carbonyl complexes containing new sterically hindered bipyridine ligands

Article abstract of DOI:10.1016/0277-5387(95)00469-6

The synthesis, characterization and reactivity of bipyridyl ruthenium carbonyl complexes of the type Ru(NN)(CO)₂Cl₂ [where NN = 4,4′-^tBu₂-2,2′-bpy (bpy*, a); 6,6′-Me₂-4,4′-^tBu₂-2,2′-bpy (dmbpy*, b); 6,6′-Ph₂-4,4′-^tBu₂-2,2′-bpy (dpbpy*, c)] is reported together with the synthesis and characterization of Ru(dpphen)(CO)₂Cl₂ [where dpphen = 2,9-Ph2-1,10-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.