2-diphenylphosphinoazacyclopentadienylmanganese tricarbonyl as a new bridging ligand

Treatment of [Mn-2(CO)(10)] with diphenyl(2-pyrrolyl)phosphine (Ph2P-2-C4H3 NH) leads to simple substitution products, the product of P-C bond cleavage [Mn-2(mu-H)(mu-PPh2)(CO)(8)], but the most interesting product (21%) is th e trinuclear compound [Mn-3(mu(3)-P,N,eta(5)-Ph2PC4H3N)(CO)(11)], the X-ray structure of which shows it to contain the bidentate ligand, 2-diphenylpho sphinoazacyclopentadienylmanganese tricarbonyl, Mn(eta(5)-Ph2PC4H3N)(CO)(3) , which bridges across a Mn-2(CO)(8) unit as a novel four-electron donating chiral N,P-ligand. (C) 1999 Elsevier Science S.A. All rights reserved.