Metal organic compounds of the general formula I wherein M is Mo or W, R 1 is C 1 -C 12 -alky, 5- to 18-membered aryl, which in turn may be substituted with one or more of C 1 -C 12 -alkyl, 5- to 18-membered aryl, C 1 -C 12 -alkyloxy, di(C 1 -C 4 -alkyl)amino, halogen, trifluoromethyl, cyano, nitro residues, which may be the same or may be different, the substituents X, Y may be the same or may be different and may be inde-pendently selected from one another from: halogen, methanesulfonyloxy, trifluoro-methanesulfonyloxy, benzenesulfonyloxy, toluenesulfonyloxy, pyrrolyl, C 1 -C 12 -alkyloxy, 5- to 18-membered aryloxy, tri(C 1 -C 12 -alkyl)silyloxy, di(C 1 -C 12 -alkyl)(C 6 -C 18 -aryl)silyloxy, (C 1 -C 12 -alkyl)di(C 6 -C 18 -alryl)silyloxy, tris(C 1 -C 12 -alkyloxy)silyloxy, which in turn may be substituted with one or more of C 1 -C 12 -alkyl, 5- to 18-membered aryl, C 1 -C 12 -alkoxy, di-(C 1 -C 4 -alkyl)amino, halogen, trifluoromethyl, cyano, nitro residues, which may be the same or may be different, R 2 is H, C 1 -C 12 -alkyl, 5- to 18-membered aryl, which in turn may be substituted with one or more of C 1 -C 12 -alkyl, 5- to 18-membered aryl, C 1 -C 12 -alkyloxy, di(C 1 -C 4 -alkyl)amino, halogen, trifluoromethyl, cyano, nitro residues, which may be the same or may be different, R 3 is C 1 -C 12 -alkyl, 5- to 18-membered aryl, which in turn may be substituted with one or more of C 1 -C 12 -alkyl, 5- to 18-membered aryl, C 1 -C 12 -alkyloxy, di(C 1 -C 4 -alkyl)amino, halogen, trifluoromethyl, cyano, nitro residues, which may be the same or may be different, R a, R b, R c, R d, R e, R f, R g, R h may be the same or may be different and may be inde-pendently selected from one another from H, halogen, nitro, cyano, trifluoromethyl, C 1 -C 12 -alkoxycarbonyl, C 1 -C 12 -alkyl, 5- to 18-membered aryl, C 1 -C 12 -alkyloxy, di-(C 1 -C 4 -alkyl)amino, which in turn may be substituted with one or more of C 1 -C 12 -alkyl, 5- to 18-membered aryl, C 1 -C 12 -alkyloxy, di-(C 1 -C 4 -alkyl)amino, halogen, tri-fluoromethyl, cyano, nitro residues, which may be the same or may be different, or residues R d and R e are connected to one other while forming a 5- to 8-membered ring. M is Mo or W, R 1 is C 1 -C 12 -alky, 5- to 18-membered aryl, which in turn may be substituted with one or more of C 1 -C 12 -alkyl, 5- to 18-membered aryl, C 1 -C 12 -alkyloxy, di(C 1 -C 4 -alkyl)amino, halogen, trifluoromethyl, cyano, nitro residues, which may be the same or may be different, the substituents X, Y may be the same or may be different and may be inde-pendently selected from one another from: halogen, methanesulfonyloxy, trifluoro-methanesulfonyloxy, benzenesulfonyloxy, toluenesulfonyloxy, pyrrolyl, C 1 -C 12 -alkyloxy, 5- to 18-membered aryloxy, tri(C 1 -C 12 -alkyl)silyloxy, di(C 1 -C 12 -alkyl)(C 6 -C 18 -aryl)silyloxy, (C 1 -C 12 -alkyl)di(C 6 -C 18 -alryl)silyloxy, tris(C 1 -C 12 -alkyloxy)silyloxy, which in turn may be substituted with one or more of C 1 -C 12 -alkyl, 5- to 18-membered aryl, C 1 -C 12 -alkoxy, di-(C 1 -C 4 -alkyl)amino, halogen, trifluoromethyl, cyano, nitro residues, which may be the same or may be different, R 2 is H, C 1 -C 12 -alkyl, 5- to 18-membered aryl, which in turn may be substituted with one or more of C 1 -C 12 -alkyl, 5- to 18-membered aryl, C 1 -C 12 -alkyloxy, di(C 1 -C 4 -alkyl)amino, halogen, trifluoromethyl, cyano, nitro residues, which may be the same or may be different, R 3 is C 1 -C 12 -alkyl, 5- to 18-membered aryl, which in turn may be substituted with one or more of C 1 -C 12 -alkyl, 5- to 18-membered aryl, C 1 -C 12 -alkyloxy, di(C 1 -C 4 -alkyl)amino, halogen, trifluoromethyl, cyano, nitro residues, which may be the same or may be different, R a, R b, R c, R d, R e, R f, R g, R h may be the same or may be different and may be inde-pendently selected from one another from H, halogen, nitro, cyano, trifluoromethyl, C 1 -C 12 -alkoxycarbonyl, C 1 -C 12 -alkyl, 5- to 18-membered aryl, C 1 -C 12 -alkyloxy, di-(C 1 -C 4 -alkyl)amino, which in turn may be substituted with one or more of C 1 -C 12 -alkyl, 5- to 18-membered aryl, C 1 -C 12 -alkyloxy, di-(C 1 -C 4 -alkyl)amino, halogen, tri-fluoromethyl, cyano, nitro residues, which may be the same or may be different, or residues R d and R e are connected to one other while forming a 5- to 8-membered ring.