Metal organic compounds

Compound having formula

• or formula [(CpR21R22R23R24R25)Ru(R4R5 (DAD) R6R7) R3],
• wherein R3 is selected from H, C1-C3 linear alkyl, or C3-C5 branched alkyl,
• wherein (R4R5 (DAD) R6R7) is selected from a chelating 1,4-diazadiene or a bis-hydrazone derivative of the general formula (R4)—N—CR5—CR6—N—(R7);
• wherein R4 and R7 are independently selected from the group consisting of C1-C3 linear alkyl, C3-C5 branched alkyl, and C3-C6 cyclic alkyl;
• or R4 is (R8,R9)N— and R7 is (R12,R13)N—, and R8, R9, R12 and R13 are independently selected from the group consisting of H, C1-C3 linear alkyl, C3-C5 branched alkyl, or two neighboring groups, selected from R8 and R9 or R12 and R13, which form a C3-C6 saturated or unsaturated cyclic alkyl, which optionally contain a heteroatom selected from O or S;
• R5 and R6 are independently selected from the group consisting of H, C1-C6 linear alkyl, C3-C6 branched alkyl, and C3-C6 cyclic alkyl;
• wherein R21, R22, R23, R24 and R25 are, independently from each other, selected from the group consisting of C1-C3 linear alkyl, C3-C6 branched alkyl, C3-C6 cyclic alkyl and NR312, wherein R31 is selected from the group consisting of H, methyl, ethyl, and isopropyl or two of R21,R22,R23,R24 and R25 are so linked to each other to form a phenylene.