Reductive Coupling of Acetonitrile by Uranium and Thorium Hydride Complexes To Give Cyanopentadienyl Dianion (C6N3H7)~(2-)

摘要

Recent studies of reductive organoactinide chemistry have shown that multielectron reductions can be achieved by combining ligand-based reduction with traditional metal-based reduction.This ligand-based reduction is available not only in sterically crowded complexes such as [(C5Me5)3U] [Eq.(1)] and [{(C5Me5)2U}2(QH6)],but also in com-pounds with normal bond lengths such as [(C5Me4R)2U(mu-Ph)2BPh2] (R=Me,H) [Eq.(2)].Hence,in Equation (1) the (C5Me5)~-ligand delivers an electron and forms (C5Me5)2 as a by-product in a sterically induced reduction process,but in Equation (2) (BPh4)~-acts as a reductant without apparent steric inducement.