Materials for organic electroluminescent devices

A compound of the formula (3e) or formula (4e):

• where the following applies to the symbols and indices used:
• R is on each occurrence, identically or differently, H, D, F, Cl, Br, I, N(Ar)2, C(═O)Ar, P(═)Ar2, S(═O)Ar, S(═O)2Ar, CR2═CR2Ar, CN, NO2, Si(R2)3, B(OR2)2, OSO2R2, a straight-chain alkyl, alkoxy or thioalkoxy group having 1 to 40 C atoms or a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 40 C atoms, each of which may be substituted by one or more radicals R2, where one or more non-adjacent CH2 groups may be replaced by R2C═CR2, Si(R2)2, Ge(R2)2, Sn(R2)2, C═O, C═S, C═Se, C═NR2, P(═O)(R2), SO, SO2, NR2, S or CONR2 and where one or more H atoms may be replaced by D, F, Cl, Br, I, CN or NO2, or an aryl or heteroaryl group having 5 to 40 ring atoms, which may in each case be substituted by one or more radicals R2, or an aromatic or heteroaromatie ring system having 5 to 60 aromatic ring atoms, which may in each case be substituted by one or more radicals R2, or an aryloxy or heteroaryloxy group having 5 to 40 aromatic ring atoms, which may be substituted by one or more radicals R2, or an aralkyl or heteroaralkyl group having 5 to 40 aromatic ring atoms, which may be substituted by one or more radicals R2, or a combination of these systems;
• two or more substituents R here, together with the atoms to which they are bonded, may also form a mono- or polycyclic, aliphatic or aromatic ring system with one another;
• Ar is on each occurrence, identically or differently, an aromatic or heteroaromatic ring system which may be substituted by one or more radicals R1;
• R1 is on each occurrence, identically or differently, H, D, F, Cl, Br, I, CN, NO2, CF3, B(OR2)2, Si(R2)3, a straight-chain alkyl, alkoxy or thioalkoxy group having 1 to 40 C atoms or a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 40 C atoms, or an alkenyl or alkynyl group having 2 to 40 C atoms, each of which may be substituted by one or more radicals R2, where one or more aeon-adjacent CH2 groups may be replaced by —R2C═CR2, —C≡C—, Si(R2)2, Ge(R2)2, Sn(R2)2, C═O, C═S, C═Se, C═NR2, —O—, —S—, —COO— or —CONR2— and where one or more H atoms may be replaced by F, Cl, Br, I, CN or NO2, or arylamines, or substituted or unsubstituted carbazoles, which may in each case be substituted by one or more radicals R2, or an aryl or heteroaryl group having 5 to 40 ring atoms, which may be substituted by one or more aromatic, heteroaromatic or non-aromatic radicals R2, or an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms, which may be substituted by one or more non-aromatic radicals R2, or an aryloxy or heteroaryloxy group having 5 to 40 aromatic ring atoms, which may be substituted by one or more radicals R2, or an aralkyl car heteroaralkyl group having 5 to 40 aromatic ring atoms, which may be substituted by one or more radicals R2, or a combination of these systems;
• two or more substituents R1 here may also form a mono- or polycyclic aliphatic or aromatic ring system with one another, together with the atoms to which they are bonded;
• R2 is on each occurrence, identically or differently, H, D or an aliphatic hydrocarbon radical having 1 to 20 C atoms or an aryl or heteroaryl group having 5 to 40 ring atoms, or a combination of these groups;
• the following compound is furthermore excluded from the invention: