New bidentate cationic and zwitterionic relatives of Crabtree's hydrogenation catalyst
Literature Information
Judy Cipot, Robert McDonald, Mark Stradiotto
Inspired by the monodentate P,N ligation strategy featured in Crabtree's catalyst [(COD)Ir(PCy3)(Py)]+PF6− ([1]+PF6−), a new class of bidentate cationic ([2]+X−) and zwitterionic (3) Ir complexes have been developed, which are capable of mediating the hydrogenation of alkenes under mild conditions and in a wider range of solvents than is possible for [1]+PF6−.
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