Poisson groupoids and double structures

This invention concerns processes for the reductive hydrolysis of nitriles to alcohols utilizing as a catalyst a transition metal complex of the formula MHZ(CO)Ln(PR3)2 wherein: M is a transition metal selected from the group consisting of: Fe, Ru and Os; Z is an anionic ligand; L is a neutral ligand; n is 0 or 1; and PR3 is a phosphine ligand.