| 主权项 |
1. A component for a high-frequency product comprising a compound of formula I
R1—(A1—Z1)m—A2—Z2A3pZ3—A4—(Z5—A5)n—R2 I in which A1, A2, A3, A4, A5 each, independently of one another, denote a) 1,4-phenylene, in which one or more CH groups may be replaced by N, or a 2,6-naphthylene group of the formula b) a radical from the group thiophene-2,5-diyl, furan-2,5-diyl or a group of the formulaor
c) trans-1,4-cyclohexylene or cyclohexenylene, in which, one or two non-adjacent CH2 groups may be replaced by —O— and/or —S—, and in which H may be replaced by F, 1,4-bicyclo[2.2.2]octylene, cyclobutane-1,3-diyl or spiro[3.3]heptane-2,6-diyl, and in which, groups a), b) and c), one or more H atoms may also be substituted by a group as defined for L, where one or more of the groups A2, A3 and A4 denote a group of the formula L independently denotes branched or unbranched alkyl having 1 to 12 C atoms, alkenyl or alkynyl having 2 to 12 C atoms, in which in each case, independently of one another, one or more hydrogen atoms may be replaced by F or Cl and one or more —CH2— groups may be replaced by O , or denotes C3-C6 cycloalkyl or C3-C6 cycloalkenyl, F, Cl, Br, CN, NCS, SCN or SF5, Z2, Z3 independently denote —C≡C— or Y1, Y2, independently of one another, denote H, F, Cl, C1-C10 alkyl, Z1, Z5, independently of one another, denote 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 both sides, R1 and R2, independently of one another, denote a halogenated or unsubstituted alkyl radical having 1 to 15 C atoms, where one or more CH2 groups in these radicals may each be replaced, independently of one another, by —C≡C—, —CH═CH—, —CF═CF—, —CF═CH—, —CH═CF—, —(CO)—, —S— or —O— in such a way that S or O atoms are not linked directly to one another,
or denote F, Cl, Br, CN, CF3, OCF3, —NCS or SF5,R2 also denotes H, m, n, independently of one another, denote 0, 1 or 2, and p denotes 1 or 2. |
