Patent ID: 7820828
Filing Date: 2010-10-26
Classification: C09K,H01L

Abstract:
1. A compound of the formula (Va), (Vb), (Vc), (Vd), (Ve) or (Vf) wherein M L is a bidentate ligand; A A or A wherein A 41 , A 42 , A 43 , A 44 , A 45 and A 46 are independently of each other H, halogen, CN, C 1 -C 24 alkyl, C 1 -C 24 perfluoroalkyl, C 1 -C 24 alkoxy, C 1 -C 24 alkylthio, C 6 -C 18 aryl which may optionally be substituted by G, —NR 25 R 26 , —CONR 25 R 26 , —COOR 27 or C 2 -C 10 heteroaryl; R G is C R R R wherein E A R R wherein A 41 , A 42 , A 43 , A 44 , A 45 and A 46 are independently of each other H, halogen, CN, C 1 -C 24 alkyl, C 1 -C 24 perfluoroalkyl, C 1 -C 24 alkoxy, C 1 -C 24 alkylthio, C 6 -C 18 aryl which may optionally be substituted by G, —NR 25 R 26 , —CONR 25 R 26 , —COOR 27 or C 2 -C 10 heteroaryl; R R