Patent ID: 8691401

Claim:
A metal-carbene complex of formula (I): wherein: each R 1 is independently hydrogen, a linear or branched alkyl radical having 1 to 20 carbon atoms, which is optionally interrupted by at least one heteroatom and optionally bears at least one functional group, a cycloalkyl radical having 3 to 20 carbon atoms, which is optionally interrupted by at least one heteroatom and optionally bears at least one functional group, a substituted or unsubstituted aryl radical having 6 to 30 carbon atoms and optionally bearing at least one functional group, a substituted or unsubstituted heteroaryl radical having a total of 5 to 18 carbon atoms and heteroatoms and optionally bears at least one functional group, or the two R 1 radicals, together with the carbon atom to which they are bonded, form a substituted or unsubstituted C 5 , C 6 , C 7 , or C 8 ring; R 5 and R 6 together, or R 6 and R 7 together, form a unit of the formula: wherein * denotes the connection to the carbon atoms of the benzene ring bearing the R 5 and R 6 radicals or R 6 and R 7 radicals, and the A is connected to the carbon atom bearing the R 5 , R 6 , or R 7 radical, A is oxygen or sulfur; R 2 is a linear or branched alkyl radical having 1 to 20 carbon atoms, which is optionally interrupted by at least one heteroatom and optionally bears at least one functional group, a cycloalkyl radical having 3 to 20 carbon atoms, which is optionally interrupted by at least one heteroatom and optionally bears at least one functional group, a substituted or unsubstituted aryl radical having 6 to 30 carbon atoms and optionally bearing at least one functional group, a substituted or unsubstituted heteroaryl radical having a total of 5 to 18 carbon atoms and/or heteroatoms and optionally bearing at least one functional group; R 3 and R 4 are each independently a linear or branched alkyl radical having 1 to 20 carbon atoms, which is optionally interrupted by at least one heteroatom and optionally bears at least one functional group, a cycloalkyl radical having 3 to 20 carbon atoms, which is optionally interrupted by at least one heteroatom and optionally bears at least one functional group, a substituted or unsubstituted aryl radical having 6 to 30 carbon atoms and optionally bearing at least one functional group, a substituted or unsubstituted heteroaryl radical having a total of 5 to 18 carbon atoms and/or heteroatoms and optionally bearing at least one functional group; R 8 is a linear or branched alkyl radical having 1 to 4 carbon atoms; and m and n are each independently 0, 1, 2, or 3.