1. (a) K.H. Dötz, H. Fischer, P. Hofmann, F.R. Kreissl, U. Schubert, K. Weiss, Transition Metal Carbene Complexes, Verlag Chemie, Weinheim, 1983. (b) B. Crociani, in: P.S. Braterman (ed.), Reactions of Coordinated Ligands, vol. 1, Plenum, New York, 1986, p. 553.
2. Reviews on coordination chemistry of isocyanides: (a) E. Singleton, H.E. Oosthuizen, Adv. Organomet. Chem. 22 (1983) 209. (b) P.M. Treichel, Adv. Organomet. Chem. 11 (1973) 21.
3. F.E. Hahn, Angew. Chem. 105 (1993) 681; Angew. Chem. Int. Ed. Engl. 32 (1993) 650.
4. (a) L. Tschugajeff, M. Skanawy-Grigorjewa, J. Russ. Chem. Soc. 47 (1915) 776. (b) L. Tschugajeff, M. Skanawy-Grigorjewa, A. Posnjak, Z. Anorg. Chem. 148 (1925) 37.
5. E.O. Fischer, A. Maasböl, Angew. Chem. 76 (1964) 645; Angew. Chem. Int Ed. Engl. 3 (1964) 580.