Neighboring Metal-Induced Oxidative Addition in Conjunction with a Hydride Trap: Formation of [(η5-MeC5H4)Fe(CO)(μ-η1:η1-PPh2CH2PPh2)(μ-H)M(CO)4] (M = W, Mo)
摘要:
The reaction of (eta(4)-MeC(5)H(5))Fe(CO)2(eta(1)-dppm), 1, with M(CO)(3)L(3) produced (eta 5-MeC(5)H(4))Fe(CO)(mu-eta(1);eta(1)-dppm)(mu-H)M(CO)(4), 3 (L(3) = (C2H5CN)(3), (THF)(3), C7H8; M = W, Mo). The novel hydride-bridged Fe(II)-M(0) compound was likely formed via the following steps: coordination of the monodentate dppm to M and then CO migration from Fe to M with a sequential or concerted oxidative addition of the endo-C-H bond of the eta(4)-MeC(5)H(5) ligand to give the (eta 5-MeC(5)H(4))FeH complex, followed by a trapping of the Fe-H bond by M forming a six-membered heterocyclic ring in 3.