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Nickel boride catalysts in organic synthesis. I: A new ferromagnetic catalyst from the diborane reduction of nickel acetate

1986; Elsevier BV; Volume: 23; Issue: 2 Linguagem: Inglês

10.1016/s0166-9834(00)81298-1

1873-3867

Min‐Hon Rei, Lin‐Lon Sheu, Y.Z. Chen,

Boron Compounds in Chemistry

Using diborane as the reducing agent, we have prepared a new nickel boride catalyst, DBNi, which differs from the well known nickel boride catalysts, such as P-1, P-2 and P-2W (water-washed P-2), in its composition, catalytic activity and magnetic properties. DBNi has a higher Ni/B ratio. It catalyzes the hydrogenation of cyclohexanone and nitrobenzene much more effectively than do P-1,P-2 or P-2W. However, it is only slightly more effective than P-1 in catalyzing hydrogenation of olefinic compounds such as cyclohexene, styrene and benzene. DBNi is a ferromagnetic catalysts whereas P-1 is not. These properties make DBNi an ideal catalyst for hydrogenation reaction, having high reactivity and being easy to separate from the reaction mixture.