Patent ID: 8617723

Claim:
A compound of the formula (1) containing a metal M coordinated to a ligand L of the formula (2) and M is a transition metal, aluminium or gallium, wherein the following applies to the symbols and indices used: V is B, BR âˆ’ , CR, CO âˆ’ , CN(R 1 ) 2 , SiR, N, NO, NR + , P or PO; a is 0 or 1, where, in the case where a=0, the bridging unit V is not present; L1 is a ligand moiety of the formula (3) L2 and L3 are, identically or differently on each occurrence, each a ligand moiety of the formula (3), formula (4) or formula (5) Cy1 and Cy2 are, identically or differently on each occurrence, an aryl or heteroaryl group having 5 to 30 aromatic ring atoms, which is optionally substituted by one or more radicals R, or a cyclic saturated or preferably unsaturated carbene; one of the two groups Cy1 or Cy2 here is bonded to the metal via a formally negatively charged carbon or via a formally negatively charged exocyclic donor atom, and the other of the two groups Cy1 and Cy2 is bonded via a neutral donor atom which is part of the group Cy1 or Cy2 and which is selected from nitrogen, and carbon in the form of a carbene; Z is, identically or differently on each occurrence, O, S, S(â•O), S(â•O) 2 , NR, PR, P(â•O)R, C(â•O), SiR 2 or BR; R is on each occurrence, identically or differently, H, D, F, Cl, Br, I, N(R 1 ) 2 , CN, Si(R 1 ) 3 , B(OR 1 ) 2 , C(â•O)R 1 , P(â•O)(R 1 ) 2 , a straight-chain alkyl, alkenyl, alkynyl, or alkoxy group having 1 to 40 C atoms or a branched or cyclic alkyl, alkenyl, alkynyl, or alkoxy group having 3 to 40 C atoms, each of which is optionally substituted by one or more radicals R 1 , where one or more non-adjacent CH 2 groups is optionally replaced by R 1 Câ•CR 1 , Câ‰¡C, Si(R 1 ) 2 , NR 1 or O, and where one or more H atoms is optionally replaced by F, or an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms, which optionally in each case be substituted by one or more radicals R 1 , or an aryloxy or heteroaryloxy group having 5 to 60 aromatic ring atoms, which is optionally substituted by one or more radicals R 1 , or a diarylamino group, diheteroarylamino group or arylheteroarylamino group having 10 to 40 aromatic ring atoms, which may be substituted by one or more radicals R 1 , or a combination of these systems; two or more substituents R here optionally forms a mono- or polycyclic aliphatic, aromatic and/or benzo-fused ring system with one another; D1 and D2 are identical or different on each occurrence and which contain at least nitrogen, phosphorus, oxygen or sulfur.