Patent ID: 7491859

Claim:
A catalyst system comprising I) a source of group VIII metal; II) a bidentate ligand which is selected from the group consisting of 2,2-dimethyl-1 ,3-bis-(1,4-cyclooctylene-phosphino)-propane,2-methyl-2-hydroxymethyl-1,3-bis-(1,4-cyclooctylene-phosphino)-propane; 2,2 dihydroxymethyl-1,3-bis-(1,4-cyclooctylene-phosphino)-propane; 2,2-dimethyl-1,3-bis-(1,5-cyclooctylene-phosphino)-propane; 2-methyl-2-hydroxymethyl-1,3-bis-(1,5-cyclooctylene-phosphino)-propane; and 2,2 dihydroxymethyl-1,3-bis-(1,5-cyclooctylene-phosphino)-propane.