Patent ID: 8492749
Filing Date: 2013-07-23
Classification: C07F,C09K,H01L,H05B

Abstract:
1. A compound of formula (I) wherein the ring A,  represents an optionally substituted aryl group which can optionally contain heteroatoms, the ring B,  represents an optionally substituted nitrogen containing aryl group, which can optionally contain further heteroatoms, or the ring A may be taken with the ring B binding to the ring A to form a ring; the group C,  represents an acyclic carbene or a cyclic carbene (ring C), which can optionally contain heteroatoms, the ring D,  represents an optionally substituted aryl group which can optionally contain heteroatoms, n1 is an integer of 1 to 3, m1 is an integer of 0, 1 or 2, m2 is an integer 0 or 1, M L Y is —C(═O)— or —C(X y is 0 or 1; with the proviso that the following compounds wherein L-L=η 4 −1,5-cyclooctadiene and Ar=2,6-diisopropylphenyl, are excluded.