Patent ID: 8871879

Claim:
A complex having the structure of formula (I) wherein: α and β represent single bonds or unsaturated bonds, with the proviso that α and β cannot both be unsaturated bonds; M is a Group 8 transition metal; R 1 and R 2 are independently selected from hydrogen, hydrocarbyl, substituted hydrocarbyl, heteroatom-containing hydrocarbyl, substituted heteroatom-containing hydrocarbyl, and functional groups; Q is an organic diradical; X 1 and X 2 are cis anionic ligands, and may be the same or different; L 1 is a neutral electron donor ligand, and p is zero or 1; when α is a single bond, L 2 is selected from NR 7 R 8 , PR 7 R 8 , N═CR 7 R 8 , and R 7 C═NR 8 , where R 7 and R 8 are independently selected from substituted and/or heteroatom-containing C 1 -C 20 alkyl, C 2 -C 20 alkenyl, C 2 -C 20 alkynyl, and C 5 -C 24 aryl, or R 7 and R 8 can be taken together to form a heterocyclic ring; when α is an unsaturated bond, L 2 is selected from NR 7 and PR 7 , where R 7 is as defined previously, or L 2 and Z represent adjacent atoms in an aromatic ring; Y and Z are linkages independently selected from hydrocarbylene, substituted hydrocarbylene, heteroatom-containing hydrocarbylene, substituted heteroatom-containing hydrocarbylene, —O—, —S—, —NR 9 , and —PR 9 —, wherein R 9 is selected from hydrocarbyl, substituted hydrocarbyl, heteroatom-containing hydrocarbyl, and substituted heteroatom-containing hydrocarbyl, and further wherein Y and Z may represent adjacent atoms in an aromatic ring; m is zero or 1; n is zero or 1; and wherein the complex is a positional isomer, wherein L 2 and the ligand containing Q are bonded to M in a cis orientation.