Compounds for electronic devices

A compound of the formula (I)

• where
• represents a group of the formula
• or a group of the formula
• and where the symbols occurring are as defined below:
• X1, X2 and X3 are on each occurrence a divalent group selected, identically or differently, from BR1, C(R1)2, Si(R1)2, C═O, C═NR1, C═C(R1)2, NR1, O, S, S═O, S(═O)2, PR1 or P(═O)R1;
• X4 and X5 are on each occurrence selected, identically or differently, from CR1, N or P;
• Z is on each occurrence selected, identically or differently, from CR1 and N;
• Ar1 and Ar2 are on each occurrence, identically or differently, an aryl group having 6 to 60 aromatic ring atoms or a heteroaryl group having 5 to 60 aromatic ring atoms, each of which is optionally substituted by one or more radicals R2;
• R1 and R2 are on each occurrence, identically or differently, H, D, F, Cl, Br, I, B(OR3)2, CHO, C(O)R3, CR3═C(R3)2, CN, COOR3, CON(R3)2, Si(R3)3, N(R3)2, NO2, P(═O)(R3)2, OSO2R3, OH, S(═O)R3, S(═O)2R3, a straight-chain alkyl, alkoxy or thioalkyl group having 1 to 40 C atoms or a branched or cyclic alkyl, alkoxy or thioalkyl group having 3 to 40 C atoms or an alkenyl or alkynyl group having 2 to 40 C atoms, each of which is optionally substituted by one or more radicals R3, where one or more CH2 groups is optionally replaced by —R3C═CR3—, —C≡C—, Si(R3)2, Ge(R3)2, Sn(R3)2, C═O, C═S, C═Se, C═NR3, —COO—, —CONR3—, NR3, P(═O)(R3), —O—, —S—, SO or SO2 and where one or more H atoms is optionally replaced by D, F, Cl, Br, I, CN or NO2, or an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms, which may in each case be substituted by one or more radicals R3, or an aryloxy, heteroaryloxy, aralkyl or heteroaralkyl group having 5 to 60 aromatic ring atoms, which is optionally substituted by one or more radicals R3, or a combination of these systems, where two or more radicals R1 or R2 is optionally linked to one another and may form an aliphatic or aromatic ring system;
• R3 is on each occurrence, identically or differently, H, D, F, Cl, Br, I, B(OR4)2, CHO, C(O)R4, CR4═C(R4)2, CN, COOR4, CON(R4)2, Si(R4)3, N(R4)2, NO2, P(═O)(R4)2, OSO2R4, OH, S(═O)R4, S(═O)2R4, a straight-chain alkyl, alkoxy or thioalkyl group having 1 to 40 C atoms or a branched or cyclic alkyl, alkoxy or thioalkyl group having 3 to 40 C atoms or an alkenyl or alkynyl group having 2 to 40 C atoms, each of which is optionally substituted by one or more radicals R4, where one or more CH2 groups is optionally replaced by —R4C═CR4—, —C≡C—, Si(R4)2, Ge(R4)2, Sn(R4)2, C═O, C═S, C═Se, C═NR4, —COO—, —CONR4—, NR4, P(═O)(R4), —O—, —S—, SO or SO2 and where one or more H atoms is optionally replaced by D, F, Cl, Br, I, CN or NO2, or an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms, which may in each case be substituted by one or more radicals R4, or an aryloxy or heteroaryloxy group having 5 to 60 aromatic ring atoms, which is optionally substituted by one or more radicals R4, or a combination of these systems, where two or more radicals R3 is optionally linked to one another and may form an aliphatic or aromatic ring system;
• R4 is, identically or differently on each occurrence, H, D, F or an aliphatic, aromatic and/or heteroaromatic organic radical having 1 to 20 C atoms, in which, in addition, one or more H atoms is optionally replaced by D or F;
• two or more identical or different substituents R4 here is optionally linked to one another and form an aliphatic or aromatic ring system;
• where it is excluded that X2 and X3 simultaneously represent a group of the formula C═O,
• and where it is furthermore excluded that X4 and X5 simultaneously represent a group of the formula CR1,
• and where the following compounds are furthermore excluded: