2-Diphenylphosphinoazacyclopentadienylmanganese tricarbonyl as a new bridging ligand

Treatment of [Mn2(CO)10] with diphenyl(2-pyrrolyl)phosphine (Ph2P-2-C4H3NH) leads to simple substitution products, the product of PC bond cleavage [Mn2(μ-H)(μ-PPh2)(CO)8], but the most interesting product (21%) is the trinuclear compound [Mn3(μ3-P,N,η5-Ph2PC4H3N)(CO)11], the X-ray structure of which shows it to contain the bidentate ligand, 2-diphenylphosphinoazacyclopentadienylmanganese tricarbonyl, Mn(η5-Ph2PC4H3N)(CO)3, which bridges across a Mn2(CO)8 unit as a novel four-electron donating chiral N,P-ligand.