Catalytic hydrogenation of nitriles and dehydrogenation of amines with the rhodium( I ) hydrido compounds [RhH(PPr i 3 ) 3 ] and [Rh 2 H 2 (µ-N 2 ){P(cyclohexyl) 3 } 4 ]

[RhH(PPri3)3] and [Rh2H2(µ-N2){P(cyclohexyl)3}4] are active catalysts for the hydrogenation of nitriles under ambient conditions, producing primary amines selectively; they are also active for the dehydrogenation of amines at higher temperatures to give nitriles or imines.