Compounds for electronic devices

A compound of formula (I-1) or (III-1):

• wherein
• Ar1 is on each occurrence, identically or differently, selected from the group consisting of phenyl, naphthyl, anthracenyl, phenanthrenyl, pyrenyl, triphenylenyl, chrysenyl, biphenyl, terphenyl, fluorenyl, spirobifluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl or silafluorenyl, each of which is optionally substituted by one or more radicals R1;
• R1 is on each occurrence, identically or differently, H, D, F, Cl, Br, I, C(═O)R2, CN, Si(R2)3, N(R2)2, NO2, P(═O)(R2)2, S(═O)R2, S(═O)2R2, a straight-chain alkyl, alkoxy, or thioalkyl group having 1 to 20 C atoms or a branched or cyclic alkyl, alkoxy, or thioalkyl group having 3 to 20 C atoms or an alkenyl or alkynyl group having 2 to 20 C atoms, each of which is optionally substituted by one or more radicals R2 and wherein one or more CH2 groups is optionally replaced by —R2C═CR2—, —C≡C—, Si(R2)2, C═O, C═S, C═NR2, —C(═O)O—, —C(═O)NR2—, NR2, P(═O)(R2), —O—, —S—, SO, or SO2 and wherein one or more H atoms is optionally replaced by D, F, Cl, Br, I, CN, or NO2, an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms optionally substituted by one or more radicals R2, or an aryloxy or heteroaryloxy group having 5 to 30 aromatic ring atoms optionally substituted by one or more radicals R2, and wherein two or more radicals R1 optionally define a ring with one another;
• R2 is on each occurrence, identically or differently, H, D, F, Cl, Br, I, C(═O)R3, CN, Si(R3)3, N(R3)2, NO2, P(═O)(R3)2, S(═O)R3, S(═O)2R3, a straight-chain alkyl, alkoxy, or thioalkyl group having 1 to 20 C atoms or a branched or cyclic alkyl, alkoxy, or thioalkyl group having 3 to 20 C atoms or an alkenyl or alkynyl group having 2 to 20 C atoms, each of which is optionally substituted by one or more radicals R3 and wherein one or more CH2 groups is optionally replaced by —R3C═CR3—, —C≡C—, Si(R3)2, C═O, C═S, C═NR3, —C(═O)O—, —C(═O)NR3—, NR3, P(═O)(R3), —O—, —S—, SO, or SO2 and wherein one or more H atoms in the above-mentioned groups is optionally replaced by D, F, Cl, Br, I, CN, or NO2, an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms optionally substituted by one or more radicals R3, or an aryloxy or heteroaryloxy group having 5 to 30 aromatic ring atoms optionally substituted by one or more radicals R3, and wherein two or more radicals R2 optionally define a ring system with one another;
• R3 is on each occurrence, identically or differently, H, D, F, or an aliphatic, aromatic, or heteroaromatic organic radical having 1 to 20 C atoms, wherein one or more H atoms is optionally replaced by D or F;
• and wherein two or more radicals R3 optionally define a ring system with one another;
• X is C(R1)2;
• and
• m, n, o, p, q, and r
• are on each occurrence, identically or differently, 0 or 1;
• wherein when any one of m, n, o, p, q and r is 0, a group R1 is bonded instead at the relevant positions to which the corresponding group X is bonded;
• and wherein the sum of m and n is 1, and the sum of o and p is 1, and the sum of q and r is 1.