Patent ID: 7939668

Claim:
A compound according to formula I: wherein the dotted line signifies an optional bond; L is a neutral ligand; X 1 and X 2 independently of each other are anionic ligands; Y 1 is hydrogen, C 1-6 -alkyl, C 3-8 -cycloalkyl, C 2-6 -alkenyl, C 2-6 -alkynyl, C 1-6 -alkoxy, C 2-6 -alkenyloxy, C 2-6 -alkynyloxy, aryloxy, C 1-6 -alkoxycarbonyl, C 1-6 -alkylthio, aryl, arylthio, C 1-6 -alkylsulfonyl, C 1-6 -alkylsulfinyl; a, b, c and d are independently selected from hydrogen, C 1-6 -alkyl, halogen-C 1-6 -alkyl, C 2-6 -alkenyl, C 2-6 -alkynyl, C 1-6 -alkoxy, C 2-6 -alkenyloxy, C 2-6 -alkynyloxy, C 1-6 -alkylcarbonyl, aryl, hydroxy, aryloxy, nitro, C 1-6 -alkoxycarbonyl, amino, mono-C 1-6 -alkyl-or di-C 1-6 -alkylamino, halogen, thio, C 1-6 -alkylthio, arylthio, C 1 -6 -alkylsulfonyl, C 1-6 -alkylsulfinyl, arylsulfonyl, SO 3 H, C 1-6 -alkylcarbonyl amino, aryl carbonyl amino, C 1-6 -alkyl sulfonyl amino, aryl sulfonyl amino, halogen-C 1-6 -alkyl sulfonyl amino, SO 3 -C 1-6 -alkyl, OSi(C 1-6 -alkyl) 3 or SO 2 —NR′R″ wherein R′ and R″ are independently hydrogen, aryl, C 1-6 -alkyl or R′ and R″ together with the N atom to which they are attached form a carbocycle; R 1 and R 2 are independently hydrogen, C 1-6 -alkyl, C 3-8 -cycloalkyl, aryl or aryl-C 1-6 -alkyl; or, R 1 and R 2 together with the N atom to which they are attached form a 5 to 8 member carbocycle which optionally contain a nitrogen, oxygen or sulfur as an additional hetero atom; R 3 ′ and R 3 ″ are independently hydrogen, C 1-6 -alkyl, C 3-8 -cycloalkyl, aryl, aryl-C 1-6 -alkyl.