Compounds having a c-c triple bond

A compound of formula I

• in which
• H/F means F,
• A1-5 each, independently of one another, denotes
• L each denotes F,
• R1 denotes a halogenated or unsubstituted alkyl radical having 1 to 15 C atoms, in which one or more CH2 groups may each be replaced, independently of one another, by —C≡C—, —CH═CH—, —CF═CF—, —CF═CH—, —CH═CF—, —(CO)O—, —O(CO)—, —(CO)—, —O— or —S— in such a way that O or S atoms are not linked directly to one another,
• or denotes F, Cl, Br, CN, CF3, OCF3, SCN, NCS or SF5,
• X denotes
• Z1, Z2, Z4, Z5 each, independently of one another, denotes a single bond, —C≡C—, —CH═CH—, —CH2O—, —(CO)O—, —CF2O—, —CF2CF2—, —CH2CF2—, —CH2CH2—, —(CH2)4—, —CH═CF— or —CF═CF—, where asymmetrical bridges may be oriented to either side, and
• m, n, p, q independently denote 0 or 1, where m+n+p+q is 1, 2, 3 or 4.