Patent ID: 8536344

Claim:
A compound of the general formula 1, wherein X and X′ are anionic ligands; L is a ligand of the formula L 1 , L 2 , L 3 or L 4 or L is a ligand of the formula P(R 4 ) 3 , where R 4 is C 1-6 -alkyl, cycloalkyl or aryl; a, b, c, d are each, independently of one another, halogen, cyano, aryl or heteroaryl, monohalogenated or polyhalogenated aryl radicals or heteroaryl radicals; monohalogenated or polyhalogenated C 1-6 -alkyl radicals; monohalogenated or polyhalogenated C 1-6 -alkyl-substituted aryl radicals; C 1-6 -alkylcarbonyl radicals; monohalogenated or polyhalogenated C 1-6 -alkylcarbonyl radicals; C 1-6 -alkoxycarbonyl radicals; monohalogenated or polyhalogenated C 1-6 -alkoxycarbonyl radicals; arylcarbonyl radicals; monohalogenated or polyhalogenated arylcarbonyl radicals; aryloxycarbonyl radicals; monohalogenated or polyhalogenated aryloxycarbonyl radicals; —(C═O)—N(R a ) 2 radicals (where R a is a C 1-6 -alkyl or aryl radical); —NH—(C═O)—R a radicals (where R a is a C 1-6 -alkyl or aryl radical); C 1-6 -alkylsulfonyl radicals; C 1-6 -alkylsulfinyl radicals; —P(═O)(R a ) 2 radicals (where R a is a C 1-6 -alkyl or aryl radical); —SO 2 —NH—SO 2 —R a radicals (where R a is a C 1-6 -alkyl or aryl radical); —N[(SO 2 )R a ] 2 radicals (where R a is a C 1-6 -alkyl or aryl radical); R 1 is C 1-12 -alkyl, C 5-6 -cycloalkyl, C 7-18 -aralkyl, or aryl; R 2 is H, C 1-12 -alkyl, C 5-6 -cycloalkyl, C 7-18 -aralkyl, or aryl; R 3 is H, C 2-12 -alkenyl, C 2-12 -alkynyl, or aryl; R 5 and R 6 are each, independently of one another, H, C 1-6 -alkyl or aryl; R 7 and R 8 are each, independently of one another, H, C 2-6 -alkenyl or aryl; or R 7 and R 8 together form a 3- or 4-membered alkylene bridge; and Y and Y′ are each halogen.