Patent ID: 7094897

Claim:
A compound of the formula (I) or (II) where the symbols and indices are defined as follows: M is Rh or Ir; Y is O, S or Se; Z is B—R 1 , C(R) 2 , —CH═CH—, —CR 1 ═CH—, —CR 1 ═CR 1 —, C═O, NH, NR 1 , PR 1 , P(O)R 1 , P(S)R 1 , O, S, S═O, S(═O) 2 , Se or a C—C single bond; R is the same or different at each occurrence and is H, F, Cl, NO 2 , CN, a straight-chain or branched or cyclic alkyl or alkoxy group which has from 1 to 20 carbon atoms and in which one or more nonadjacent CH 2 groups is optionally replaced by —O—, —S—, —NR 1 — or —CONR 2 —, and In which one or more hydrogen atoms is optionally replaced by F, or an aryl or heteroaryl group having from 4 to 14 carbon atoms which is optionally substituted by one or more nonaromatic R radicals; and a plurality of R substituents, either on the same ring or on the two different rings together form a further mono- or polycyclic ring system; Ar 1 and Ar 2 are the same or different and are each an aryl or heteroaryl group having from 1 to 40 carbon atoms; Q1 and Q2 are the same or different at each occurrence and are each F, Cl, Br, CN, NO 2 or a straight-chain or branched or cyclic alkyl or alkoxy group which has from 1 to 20 carbon atoms and in which one or more nonadjacent CH 2 groups is optionally replaced by —O—, —S—, —CO—, —COO—, —O—CO—, —NR 1 —, —(NR 2 R 3 ) + A − or —CONR 4 , and in which one or more hydrogen atoms is optionally replaced by F, or an aryl or heteroaryl group having from 4 to 14 carbon atoms which is optionally substituted by one or more nonaromatic R radicals; A − is a singly charged anion; R 1 , R 2 , R 3 and R 4 are the same or different and are each H or an aliphatic or aromatic hydrocarbon radical having from 1 to 20 carbon atoms; a is 0, 1, 2, 3 or 4; b is 0, 1, 2 or 3; c and d are each 0, 1, 2, 3, 4 or 5; e is 0 or 1; n is 1, 2 or 3.