Comparison of the Ligating Ability of Anonic Transition Metal Complex (Mn(CO)5-), Transition Metal Hydrides (HCr(CO)5-, HW(CO)5-, cis-HW(CO)4P(OMe)3-, HFe(CO)4-, trans-HFe(CO)3P(OMe)3-), and Traditional Ligands (Br-, P(C6H5)3) to M(CO)50 (M = Cr, W)

摘要

Heterobimetallic complexes have a donor-accepter metal-metal bond in which two electrons from the electron-rich metal moiety are donated to the other electron-deficient one. Based on the competition reactions, Cotton-Kraihanzel force constants, ロ(CO)IR band resolution and the relative nucleophilicity comparison of the donor ligands, the following relative ligating ability of the donor ligands toward M(CO)5 (M=Cr, W) is assessed: cis-HW(CO)4P(OMe)3-, HW(CO)5- > HCr(CO)5--Br- > trans-HFe(CO)3P(OMe)3- > Mn(CO)5- > HFe(CO)4- > PPh3