149705-66-8

Usage

Chemical class

Halobenzenes

Physical state

Colorless liquid at room temperature

Molecular weight

372.23 g/mol

Applications

a. Building block in the synthesis of pharmaceuticals and agrochemicals
b. Reagent in organic chemical reactions
c. Precursor in the preparation of other organic compounds

Unique properties

Presence of fluorine and iodine atoms in the molecule

Reactivity

Valuable tool in the field of organic chemistry due to fluorine and iodine atoms

Safety precautions

Handle with caution, may pose health hazards if not properly handled and disposed of

Upstream product

• 144-55-8 sodium hydrogencarbonate 
• 144261-13-2 1-(trans-4-propylcyclohexyl)-3,5-difluorobenzene 
• 148150-92-9 1-(1-hydroxy-4-propylcyclohexyl)-3,5-difluorobenzene 
• 148151-00-2 1,3-Difluoro-5-(4-propyl-cyclohex-1-enyl)-benzene 
• 40649-36-3 4-propyl-cyclohexanone 
• 461-96-1 3,5-difluorobromobenzene 

Downstream Products

• 144911-50-2 2-Ethynyl-1,3-difluoro-5-(4-propyl-cyclohexyl)-benzene 

Relevant academic research and scientific papers

Liquid crystals with a chlorovinyl side chain. Effect of structural variations on the dielectric anisotropy

New nematic liquid crystals are presented incorporating an acetylene linkage within the rigid core and an (E)-chlorovinyl side chain. A synergetic effect of these structural features allows to realize very wide nematic mesophases paired with high clearing

Highly birefringent nematic liquid crystals for reflective STN applications

An important parameter of any LCD containing portable electronic device is a low power requirement. The reflective STN display mode offers a moderate to high information content display with low power consumption. One method to realise colour in this mode is to use a large retardation (dΔn) value in the cell. For a cell gap of 6 μm, and a retardation of ～1.5, a birefringence (Δn) of greater than +0.2 is necessary. To achieve such a value in an STN LC mixture, materials with broad nematic range, good solubility and a Δn value of +0.25 are required. A study of the trans-cyclohexyldifluorophenyltolane core structure was made and a large number of dialkyl, alkenyl-alkyl and alkoxy materials were synthesised and characterised. These materials possess low to moderate melting points, broad purely nematic mesophases, a high An and very good solubility in nematic LC hosts. They are suitable materials for inclusion in mixtures for colour reflective STN displays.

Fluoro-substituted phenyl-cyclohexylacetylenes

Fluoro-substituted phenyl-cyclohexylacetylenes have the formula: STR1 wherein R signifies alkyl, alkoxy, alkenyl or alkenyloxy with 1 or, respectively, 2 to 12 carbon atoms in which one CH2 group can be replaced by oxygen and/or one or more hyd

New nematics incorporating a 2,6-difluorophenyl acetylene group

A large series of thin film transistor compatible nematic liquid crystals incorporating a 2,6-difluorophenyl acetylene group have been synthesised. Most of them exhibit high clearing points and an increased dielectric anisotropy.

Fluoro-substituted tolane compounds and liquid crystalline mixtures containing same

Compounds of the general formula STR1 wherein ring A represents 1,4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl, trans-1,4-cyclohexylene or trans-1,3-dioxane-2,5-diyl; Z signifies a single covalent bond, --CH2 CH2 --, --OCHsub