Aromatic isothiocyanates

A compound of formula GF

• in which
• RG denotes H, straight-chain, non-fluorinated alkyl or alkoxy having 1 to 12 C atoms, branched, non-fluorinated alkyl or alkoxy having 3 to 12 C atoms, straight-chain, non-fluorinated alkenyl having 2 to 12 C atoms, or branched, non-fluorinated alkenyl having 2-3 to 12 C atoms, in each of which one or more CH2— groups may each be replaced by
• or a group RP,
• RP denotes halogen, CN, NCS, RF-, RF-O— or RF-S—, wherein
• RF denotes fluorinated alkyl having 1 to 9 C atoms,
• ZG1, ZG2 identically or differently, denote —CH═CH—, —CF═CF—, —CH—CF—, —CF═CH—, —C≡C—, —C≡C≡C≡C— or a single bond,
• XG1, XG2, identically or differently, denote Cl or F,
• identically or differently, denote a radical selected from the following groups:
• a) the group consisting of 1,4-phenylene, 1,4-naphthylene, and 2,6-naphthylene, in which one or two CH groups may each be replaced by N and in which one or more H atoms may each be replaced by L,
• b) the group consisting of trans-1,4-cyclohexylene, 1,4-cyclohexenylene, tetralin-2,6-diyl, tetralin-5,8-diyl, decalin-2,6-diyl, bicyclo[1.1.1]pentane-1,3-diyl, 4,4′-bicyclohexylene, bicyclo[2.2.2]octane-1,4-diyl, and spiro [3.3]-heptane-2,6-diyl, in which one or two CH groups may each be replaced by N, one or more non-adjacent CH2 groups may each be replaced by —O— and/or —S— and in which one or more H atoms may each be replaced by L, and
• c) the group consisting of thiophene-2,5-diyl, thieno [3,2-b]thiophene-2,5-diyl, and selenophene-2,5-diyl, each of which may also be mono- or polysubstituted by L,
• L on each occurrence, identically or differently, denotes F, CI, CN, SCN, SF5, straight-chain optionally fluorinated alkyl or alkoxy having 1 to 12 C atoms, branched optionally fluorinated alkyl or alkoxy having 3 to 12 C atoms, straight-chain optionally fluorinated alkylcarbonyl having 2 to 12 C atoms, branched optionally fluorinated alkylcarbonyl having 4 to 12 C atoms, straight-chain optionally fluorinated alkoxycarbonyl having 2 to 12 C atoms, branched optionally fluorinated alkoxy-carbonyl having 4 to 12 C atoms, straight-chain optionally fluorinated alkyl-carbonyloxy having 2 to 12 C atoms, branched optionally fluorinated alkyl-carbonyloxy having 4 to 12 C atoms, straight-chain optionally fluorinated alkoxycarbonyloxy having 2 to 12 C atoms, or branched optionally fluorinated alkoxycarbonyloxy having 4 to 12 C atoms, and
• u is 0, 1 or 2,
• wherein at least one of
• is not trans-1,4-cyclohexylene.