NOVELTY - Compound (Q) containing at least one nitrogen-containing partial structure (I), is new, where (Q) excludes 25 metal complexes e.g. 1,3-bis-(2,6-dimethyl-phenyl)-2,2-dimethyl-2,3-dihydro-1H-(1,3,2)diazasilole, 1,3-bis-(2,6-diisopropyl-phenyl)-2,2-dimethyl-2,3-dihydro-1H-(1,3,2)diazasilole, 2-chloro-1,3-bis-(2,6-dimethyl-phenyl)-2-methyl-2,3-dihydro-1H-(1,3,2)diazasilole, 2,2-dichloro-1,3-bis-(2,6-diisopropyl-phenyl)-2,3-dihydro-1H-(1,3,2)diazasilole, and 2,2-dichloro-1,3-bis-(2,6-diisopropyl-phenyl)-4,5-dimethyl-2,3-dihydro-1H-(1,3,2)diazasilole.    USE - Compound (Q) is useful as a matrix material for fluorescing or phosphorescing emitter, as a matrix material for fluorescing or phosphorescing emitter in combination with a further matrix material, and in an electron and/or exciton block layer, a hole transport layer, a hole injection layer of an electronic device, preferably organic electroluminescent device (organic-LED), 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 device, light emitting electrochemical cell, organic laser diode, and organic plasmon emitting device (all claimed).    ADVANTAGE - Compound (Q) provides organic electroluminescent device with high efficiencies, steep strain-stress-curves with low operating voltages, high quality and durability.    DETAILED DESCRIPTION - Compound (Q) containing at least one nitrogen containing partial structure of formula (I), is new, where (Q) excludes 25 metal complexes e.g. 1,3-bis-(2,6-dimethyl-phenyl)-2,2-dimethyl-2,3-dihydro-1H-(1,3,2)diazasilole, 1,3-bis-(2,6-diisopropyl-phenyl)-2,2-dimethyl-2,3-dihydro-1H-(1,3,2)diazasilole, 2-chloro-1,3-bis-(2,6-dimethyl-phenyl)-2-methyl-2,3-dihydro-1H-(1,3,2)diazasilole, 2,2-dichloro-1,3-bis-(2,6-diisopropyl-phenyl)-2,3-dihydro-1H-(1,3,2)diazasilole, and 2,2-dichloro-1,3-bis-(2,6-diisopropyl-phenyl)-4,5-dimethyl-2,3-dihydro-1H-(1,3,2)diazasilole.    M = Si, Ge or Sn;    q = 0 or 1;    A, B1, D, E = C, a double bond and/or an aromatic bond between A and B1 (when A is not stretched with N), a single bond between A and B (when A stretches with N), a double bond and/or an aromatic bond between D and E (when E is not stretched to Y1) or a single bond between D and E (when E is stretched with Y1);    Y1 = NR2, O or S;    R1 = 1-40C-alkyl, 1-40C-alkoxy, 1-40C-thioalkyl, cyclic 3-40C-alkyl, 3-40C-alkoxy, 3-40C-thioalkyl, 2-40C-alkenyl (all optionally substituted by at least one R3, where at least one non-adjacent CH2 are optionally substituted by R3C=CR3, C=C, Si(R3)2, Ge(R3)2, Sn(R3)2, C=O, C=S, C=Se, C=NR3, P(=O)(R3), SO, SO2, NR3, O, S or CONR3 and at least one H atoms are optionally substituted by D, F, Cl, Br, I, CN or NO2), a 5-60-membered aryl or heteroaryl ring (optionally substituted by at least one R3), or a combination of the above system, preferably optionally two or more adjacent substituents of R1 forms a monocyclic, polycyclic, direct or angular annelated, aliphatic, aryl or heteroaryl ring system (optionally substituted by at least one R3), H, D, F, Cl, Br, I, CN, NO2 or N(R3)2; either    R2 = 1-40C-alkyl, cyclic 3-40C-alkyl (both optionally substituted by at least one R3, where: at least one non-adjacent CH2 groups are optionally substituted by R3C=CR3, C?=C or C=O and at least one H atoms are optionally substituted by F, Cl, Br, I, CN or NO2), a 5-60 membered aryl or heteroaryl aromatic ring (optionally substituted by at least one R3), and a combination of the above systems, provided that in (I) at least a group R2 is present, which represents an aryl or heteroaryl ring system optionally substituted by at least one R3 and at the same time R1 and R2, which is in 1,2-position of (I), adjacent to each forms a monocyclic, polycyclic, direct or angular annelated, aliphatic, aryl or heteroaryl ring system (optionally substituted by at least one R3); or    R2a= a monocyclic, polycyclic, direct or heteroaromatic ring system; and    R3 = H, D, aliphatic 1-20C-hydrocarbon, 5-30 membered aryl or heteroaryl aromatic ring (in which at least one H atoms are optionally substituted by D, F, Cl, Br, I, CN or NO2).    INDEPENDENT CLAIMS are included for:    (1) the preparation of (Q);    (2) an oligomer, polymer or dendrimer comprising (Q) where one or more bonds of (Q) are present in the polymer, oligomer or dendrimer; and    (3) use of a compound containing at least a partial structure of formula (Ib) or oligomers, polymers or dendrimers containing (Ib) in an organic electronic component.    M1 = Si, Ge, Sn, P, P=O, P=S, As, Sb, Bi, Ti, Zr, Hf, Cr, Mo or W; and    R2a = 1-40C-alkyl, cyclic 3-40C-alkyl (both optionally substituted by R3, where: at least one non-adjacent CH2 groups are optionally substituted by R3C=CR3, C=C or C=O and at least one H atoms are optionally substituted by F, Cl, Br, I, CN or NO2), a 5-60 membered aryl or heteroaryl aromatic ring (optionally substituted by at least one R3), and a combination of the above systems, where optionally R1 and R2a, which is in 1,2-position of (Ia), adjacent to each forms a monocyclic, polycyclic, direct or angular annelated, aliphatic, aryl or heteroaryl ring system (optionally substituted by at least one R3).