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Rhodium, 5% on carbon is a useful reagent for the conversation of nitriles to primary amines and the hydrogenation of aromatic rings, pyridines, aldehydes and sugars. It is also used for the reduction of oximes to amines and for the reduction of nitrobenzene to phenylhydroxylamine using hydrazine hydrate as the hydrogen source.
Joseph J. Mrowca.; Thomas J. Katz. Catalysis of a Cycloaddition Reaction by Rhodium on Carbon. J. Am. Chem. Soc. 1966, 88 (17), 4012-4015 .
Morris Freifelder.; Ralph M. Robinson.; George R. Stone. Hydrogenation of Substituted Pyridines with Rhodium on Carbon Catalyst. J. Org. Chem. 1962, 27 (1), 284-286.
Rhodium catalysts are especially useful for the hydrogenation of aromatic rings under mild conditions. For details for the hydrogenation of 4-aminobenzoic acid to its hexahydro derivative under modest pressure, see: Org. Synth. Coll., 5, 670 (1973).
Rhodium catalysts have also been used for the reduction of oximes to amines.
For a monograph on catalytic hydrogenation, see: P. N. Rylander, Hydrogenation Methods, Academic Press, N.Y. (1985).
For the reduction of nitrobenzene to phenylhydroxylamine using hydrazine hydrate as the hydrogen source, see: Org. Synth. Coll., 8, 16 (1993).
Hazard Statements: H228
Precautionary Statements: P210-P240-P241-P280-P370+P378q
Keep away from heat/sparks/open flames/hot surfaces. - No smoking. Ground/bond container and receiving equipment. Use explosion-proof electrical/ventilating/lighting/ equipment. Wear protective gloves/protective clothing/eye protection/face protection. In case of fire: Use CO2, dry chemical, or foam