Protonation of manganese phosphonioallenyl complexes
摘要:
The addition of phosphines to the manganese allenylidene complexes Cp(CO)(2)Mn=C=C=C(Ph)R (R-H, Ph) proceeds selectively at the C-alpha atom to result in the alpha-phosphonioallenyl complexes Cp(CO)(2)Mn -C((PR31)-P-broken vertical bar)=C=C(Ph) R. The protonation of the latter affords the eta(2)-(1,2)- phosphonioallenes Cp(CO)(2)Mn{eta(2)-(1,2)- HC((+PR31))]=C=C(Ph)R}, rather than the phosphoniovinylcarbenes Cp(CO)(2)Mn= C((+PR31))-HC=C(Ph)R. All complexes obtained are stereochemically rigid and do not isomerize into the eta(2)-(2,3)-phosphonioallene isomers. (C) 2011 Elsevier B. V. All rights reserved.
Protonation of manganese phosphonioallenyl complexes
摘要:
The addition of phosphines to the manganese allenylidene complexes Cp(CO)(2)Mn=C=C=C(Ph)R (R-H, Ph) proceeds selectively at the C-alpha atom to result in the alpha-phosphonioallenyl complexes Cp(CO)(2)Mn -C((PR31)-P-broken vertical bar)=C=C(Ph) R. The protonation of the latter affords the eta(2)-(1,2)- phosphonioallenes Cp(CO)(2)Mn{eta(2)-(1,2)- HC((+PR31))]=C=C(Ph)R}, rather than the phosphoniovinylcarbenes Cp(CO)(2)Mn= C((+PR31))-HC=C(Ph)R. All complexes obtained are stereochemically rigid and do not isomerize into the eta(2)-(2,3)-phosphonioallene isomers. (C) 2011 Elsevier B. V. All rights reserved.