The cheap, commercially available iron complex, Fe(NO3)3·9H(2)O, has been used to catalyse the formation of amides by the addition of amines to nitriles.
Allen, C. L., Lapkin, A. A., & Williams, J. M. J. (2009). An iron-catalysed synthesis of amides from nitriles and amines. Tetrahedron Letters, 50(29), 4262-4264. https://doi.org/10.1016/j.tetlet.2009.05.021