Patent ID: 7767777

Claim:
A compound of formula (1) M(L) n (L′) m (L″) o (1) comprising a sub-structure M(L) n of formula (2) wherein M is a transition metal; D is, identically or differently on each occurrence, an sp 2 -hybridised carbon atom which bonds to M, or a negatively charged heteroatom which bonds to M; Cy1 is, identically or differently on each occurrence, a homo- or heterocycle which bonds to M via X, is optionally substituted by R 1 , and to which further aliphatic, aromatic or heteroaromatic rings are optionally fused; Cy2 is, identically or differently on each occurrence, a heterocycle which coordinates to M via N, is optionally substituted by R 1 , and to which further aliphatic, aromatic or heteroaromatic rings are optionally fused; R 1 is, identically or differently on each occurrence, H, F, Cl, Br, I, CN, NO 2 , OH, N(R 2 ) 2 , B(OR 2 ) 2 , CHO, OSO 2 R 2 , N(Ar) 2 , C(═O)Ar, P(═O)(Ar) 2 , S(═O)Ar, S(═O) 2 Ar, CR 2 ═CR 2 Ar, a straight-chain alkyl, alkoxy or thioalkoxy group having up to 40 C atoms, a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 40 C atoms, wherein, in each case, one or more non-adjacent CH 2 groups are optionally replaced by —R 2 C═CR 2 —, —C≡C—, Si(R 2 ) 2 , Ge(R 2 ) 2 , Sn(R 2 ) 2 , —O—, —S—, —NR 2 —, —(C═O)—, —(C═NR 2 )—, —P═O(R 2 )—, —COOR 2 —, SO, SO 2 , or —CONR 2 — and wherein one or more H atoms are optionally replaced by F, Cl, Br, I, or CN, or an aromatic or heteroaromatic ring system or an aryloxy or heteroaryloxy group having 5 to 30 aromatic ring atoms, or a combination of two, three or four of these groups; and wherein two or more radicals R 1 optionally define a further aliphatic, aromatic, or heteroaromatic ring system with one another; Ar is on each occurrence, identically or differently, an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, optionally substituted by one or more non-aromatic radicals R 1 ; wherein two radicals Ar on the same nitrogen atom are optionally linked to one another by a single bond or an O, S, N(R 2 ), or C(R 2 ) 2 bridge; R 2 is, identically or differently on each occurrence, H or an aliphatic or aromatic hydrocarbon radical having up to 20 C atoms; wherein a plurality of radicals R 2 optionally define a ring system with one another; n is 1, 2, or 3; L′ and L″ are monoanionic, bidentate-chelating ligands; m and o are, identically or differently on each occurrence, 0, 1 or 2; and wherein the ring Cy2 is partially saturated and represents an at least six-membered ring.