Patent ID: 7883785

Claim:
A compound of the formula (I), Scheme 1 where the symbols and indices have the following meanings: M is Rh or Ir; X is O, S or Se; Y is S, O, R—C═C—R or R—C═N; R is identical or different on 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 one or more H atoms is optionally replaced by F, or an aryl or heteroaryl group which has from 4 to 14 carbon atoms and is optionally substituted by one or more, nonaromatic radicals R; Ar is benzene, toluene, xylene, fluorobenzene, difluorobenzene, diphenyl, tetraphenylene, naphthalene, fluorene, phenanthrene, anthracene, 1,3,5-triphenylbenzene, pyrene, perylene, chrysene, triptycene, [2.2]paracyclophane, pyridine, pyridazine, 4,5-benzo-pyridazine, pyrimidine, pyrazine, 1,3,5-triazine, pyrrole, indole, 1,2,5- or 1,3,4-oxadiazole, 2,2′- or 4,4′-diazabiphenyl, quinoline, N-alkylcarbazole, 5,10H-dihydrophenazine, 10H-phenoxazine, N—alkylphenoxazine, phenothiazine, xanthene, 9-acridine, furan, benzofuran, thiophene or benzothiophene; Q is identical or different on each occurrence and is F, Cl, Br, I, CN, COOH, NH 2 , OH, SH, NO 2 , SO 3 H, SiR 3 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 one or more H atoms is optionally replaced by F, or heteroaryl group which has from 4 to 14 carbon atoms and is optionally substituted by one or more, nonaromatic radicals R; A − is a singly charged anion or its equivalent; are identical 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 is from 0 to 15; n is 1, 2 or 3; with the exception of the compounds: where C 8 is 2-ethylhexyl.