Patent ID: 11873438
Assignee: MERCK PATENT GMBH
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  G | IPC C  G

Claim 5:
6. The liquid-crystalline medium according to claim 1, wherein the medium comprises one or more compounds of the formulae IIA, IIB, IIC or IID,, in which
R2A, R2B, R2C 
and R2D each, independently of one another, denote H, an alkyl or alkenyl radical having up to 15 C atoms which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen and where one or more CH2 groups in these radicals may be replaced by —O—, —S—,, —C≡C—, —CF2O—, —OCF2—, —OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another,

L1 to L4 each, independently of one another, denote F or Cl,
Z2, Z2B, and Z2D each, independently of one another, denote a single bond, —CH2CH2—, —CH═CH—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —COO—, —OCO—, —C2F4—, —CF═CF—, —CH═CHCH2O—,
p denotes 0, 1 or 2,
q denotes 0 or 1,
v denotes 1 to 6, and
(O) denotes an optional oxygen atom.