NOVELTY - Complex compound (I) is new.    USE - (I) is useful as emitting compounds in at least one emitting layer of electronic devices, preferably organic electroluminescent devices, organic integrated circuits, organic field-effect transistors, organic thin film transistors, organic light-emitting transistors, organic solar cells, organic optical detectors, organic photoreceptors, organic field-quenching devices, light-emitting electrochemical cells or organic laser diodes (all claimed).    ADVANTAGE - (I): exhibits improved efficiency, improved operating voltage, improved lifetime and/or improved color coordinates; and is producible in high yields.    DETAILED DESCRIPTION - Complex compound of formula (M(L)n(L1)m) (I) is new.    L = imidazole derivative of formula (II), where several L are linked with each other by a single bond or by V1, or L is linked with L1 by a single bond or by V1, to form tridentate, tetradentate, pentadentate or hexadentate ligand;    V1 = bridging unit;    M = metal;    X = CR, CR1 or N, where at least one X is N and at least one X that is adjacent to this N is CR1; either    R = 1-20C alkyl, 1-20C (thio)alkoxy (both linear), 3-20C alkyl, 3-20C (thio)alkoxy (both branched or cyclic), 2-20C alkenyl, 2-20C alkynyl (where in all groups at least one non-adjacent CH2 group may be replaced by R2C=CR2, CC, Si(R2)2, C=O, NR2, O, S or CONR2, and at least one H may be replaced by D, F, Cl, Br, I or CN), (hetero)aromatic ring with 5-60 aromatic ring atoms, (hetero)aryloxy with 5-40 aromatic ring atoms, (hetero)aralkyl with 5-40 aromatic ring atoms, diarylamino with 10-40 aromatic ring atoms, diheteroarylamino with 10-40 aromatic ring atoms, arylheteroarylamino with 10-40 aromatic ring atoms (all optionally substituted by at least one group R2), H, D, F, Cl, Br, I, N(R2)2, CN, NO2, OH, COOH, C(=O)N(R2)2, Si(R2)3, B(OR2)2, C(=O)R2, P(=O)(R2)2, S(=O)R2, S(=O)2R2 or OSO2R2, where R additionally coordinates to a metal; or    2R, R+R1 = mono- or polycyclic aliphatic ring;    R1 = 3-20C alkyl, 3-20C alkoxy (both branched or cyclic, where in all groups at least one non-adjacent CH2 group, which is not directly bonded to the aromatic carbon atom of the ligand, may be replaced by R2C=CR2, CC, Si(R2)2, C=O, NR2, O, S or CONR2, and at least one H may be replaced by D, F, Cl, Br, I or CN), (hetero)aromatic ring with 5-60 aromatic ring atoms, (hetero)aralkyl with 5-40 aromatic ring atoms (all optionally substituted by at least one group R2), Si(R2)3, where R2 is not H or D, dialkylamino with 1-10C alkyl (optionally branched or cyclic), CF3 or OCF3, where R1 additionally coordinates to a metal; either    R2 = 1-20C alkyl, 1-20C (thio)alkoxy (both linear), 3-20C alkyl, 3-20C (thio)alkoxy (both branched or cyclic), 2-20C alkenyl, 2-20C alkynyl (where in all groups at least one non-adjacent CH2 group may be replaced by R3C=CR3, CC, Si(R3)2, C=O, NR3, O, S or CONR3, and at least one H may be replaced by D, F, Cl, Br, I, CN or NO2), (hetero)aromatic ring with 5-60 aromatic ring atoms, (hetero)aryloxy with 5-40 aromatic ring atoms, (hetero)aralkyl with 5-40 aromatic ring atoms, diarylamino with 10-40 aromatic ring atoms, diheteroarylamino with 10-40 aromatic ring atoms, arylheteroarylamino with 10-40 aromatic ring atoms (all optionally substituted by at least one group R3), H, D, F, Cl, Br, I, N(R3)2, CN, NO2, Si(R3)3, B(OR3)2, C(=O)R3, P(=O)(R3)2, S(=O)R3, S(=O)2R3 or OSO2R3; or    at least 2R2 = mono- or polycyclic aliphatic ring; either    R3 = 1-20C aliphatic hydrocarbon residue, 1-20C (hetero)aromatic hydrocarbon residue (where in both groups at least one H may be replaced by F), H, D or F; or    at least 2R3 = mono- or polycyclic aliphatic ring;    L1 = coligand;    n = 1-3; and    m = 0-4.    Provided that if partial structure of (I) comprises benzo(4,5)imidazo(1,2-c)quinazoline complex of formula (III) or (IV) or benzo(4,5)imidazo(2,1-a)phthalazine complex of formula (V) or (VI), then R1 is 4-20C alkyl (branched or cyclic and optionally substituted by at least one group R2, where at least one non-adjacent CH2 group, which is not directly bonded to the aromatic carbon atom of the ligand, may be replaced by R2C=CR2, CC, Si(R2)2, C=O, NR2, O, S or CONR2, and at least one H may be replaced by D, F, Cl, Br, I or CN), bi-, oligo- or heteroaryl with 10-60 aromatic ring atoms or (hetero)aryl (substituted by R2 group in at least one ortho-position for bonding with ligand, where R2 is not H or D). INDEPENDENT CLAIMS are also included for:    (1) preparing (I); and    (2) electronic devices, preferably organic electroluminescent devices, organic integrated circuits, organic field-effect transistors, organic thin film transistors, organic light-emitting transistors, organic solar cells, organic optical detectors, organic photoreceptors, organic field-quenching devices, light-emitting electrochemical cells or organic laser diodes, comprising at least one compound (I).