NOVELTY - Metal complex (I) is new, where (I) excludes a metal complex (II) and (III).    USE - (I) is useful as an emitting compound (in one or more emitting layers, preferably in combination with one or more matrix materials) in an electronic device, preferably organic electroluminescent device, polymeric electroluminescent device, organic integrated circuit, organic field-effect transistor, organic thin-film transistor, organic light-emitting transistor, organic solar-cell, organic optical detector, organic photoreceptor, organic field-quench devices, light-emitting electrochemical cell or organic laser diode (claimed).    ADVANTAGE - (I): can be prepared in high yield and exhibits improved efficiency, operation voltage and service life.    DETAILED DESCRIPTION - Metal complex of formula (M(L)n(L1a)m) (I) is new, where (I) excludes a metal complex of formula (II) and (III).    M(L)n = a metal containing group of formula (AA);    M = a metal;    Y1 = CR or N provided that in each ligand Y1 is N and the other ligand is C; either    R = 1-20C-alkyl, 1-20C-alkoxy, 1-20C-thioalkoxy, 2-20C-alkenyl, 2-20C-alkynyl, cyclic 3-20C-alkyl, 3-20C-alkoxy, 3-20C-thioalkoxy (where one or more non-adjacent CH2 groups are optionally R1C=CR1, C triple bond C, Si(R1)2, C=O, NR1, O, S or CONR1 and one or more H atoms are optionally replaced by D, F, Cl, Br, I or CN), C(=O)N(R1)2, Si(R1)3, B(OR1)2, C(=O)R1, P(=O)(R1)2, S(=O)R1, S(=O)2R1, OSO2R1, 5-60 membered (hetero)aryl ring, 5-40 membered (hetero)aryloxy ring, 5-40 membered (hetero)aralkyl ring, or diarylamino-, diheteroarylamino- or arylheteroarylamino-groups with 10-40 aromatic ring atoms (all optionally substituted by R1), H, D, F, Cl, Br, I, N(R1)2, CN, NO2, OH or COOH; or    2R = a mono- or polycyclic aliphatic ring; either    R1 = 1-20C-alkyl, 1-20C-alkoxy, 1-20C-thioalkoxy, 2-20C-alkenyl, 2-20C-alkynyl, or cyclic 3-20C-alkyl, 3-20C-alkoxy, or 3-20C-thioalkoxy (where one or more non-adjacent CH2 groups are optionally R2C=CR2, C?=C, Si(R2)2, C=O, NR2, O, S or CONR2 and one or more H atoms are optionally replaced by D, F, Cl, Br, I or CN or NO2), H, D, F, Cl, Br, I, N(R2)2, CN, NO2, Si(R2)3, B(OR2)2, C(O)R2, P(=O)(R2)2, S(=O)R2, S(=O)2R2, OSO2R2, 5-60 membered (herero)aryl ring, 5-40 membered (hetero)aryloxy ring, 5-40 membered (hetero)aralkyl ring, or diarylamino-, diheteroarylamino- or arylheteroarylamino-groups with 10-40 aromatic ring atoms (all optionally substituted by R2), H, D, F, Cl, Br, I, N(R1)2, CN, NO2, OH or COOH; or    2R1 = a mono- or polycyclic aliphatic, aromatic and/or benzofused ring; either    R2 = H, D, F or 1-20C-aliphatic or (hetero)aryl hydrocarbon (in which one or more H are optionally replaced by F); or    2R2 = a mono- or polycyclic aliphatic ring;    L1a = co-ligand;    n = 1-3; and    m = 0-4.    Where: the ligands L or the ligand L with L1a are bonded optionally over a bridging group and stretched to a tridentate, tetradentate, pentadentate or hexadentate ligand; and/or a substituent R is additionally coordinated to the metal.    An INDEPENDENT CLAIM is included for the preparation of (I).