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Usage

Chemical Properties

White crystal

InChI:InChI=1/C19H18FNO2/c1-2-3-4-5-13-6-9-16(19(22)23)17(10-13)14-7-8-15(12-21)18(20)11-14/h6-11H,2-5H2,1H3,(H,22,23)/p-1

Upstream product

• 26311-45-5 4-pentylbenzoic acid 
• 82380-18-5 2-fluoro-4-hydroxybenzonitrile 
• 49763-65-7 4-pentylbenzoyl chloride 
• 584-48-5 2,4-dinitrobromobenzene 
• 108-86-1 bromobenzene 
• 34667-88-4 2-fluoro-4-nitrobenzonitrile 
• 4110-33-2 2,4-dinitrobenzonitrile 
• 53312-80-4 4-amino-2-fluorobenzonitrile 

Relevant academic research and scientific papers

The Synthesis and Transition Temperatures of Some Fluoro-Substituted 4-Cyanophenyl and 4-Cyanobiphenyl-4'-yl 4-Pentyl- and 4-Butoxy-Benzoates

A series of 4-cyanophenyl 4-X-benzoates and a series of 4-cyanobiphenyl-4'-yl 4-X-benzoates (X= pentyl, butoxy) have been prepared without fluoro-substitution and with mono-fluoro to tetra-fluoro-substitution; all possible combinations of substitution patterns at the positions ortho- to the cyano group and ortho- to the carboxylate group have been obtained in an attempt to determine the structural features which are responsible for some members of these series showing very large positive values of dielectric anisotropy.The synthesis of novel precursors required for the preparation of these esters is described and the melting points and transition temperatures of the esters are discussed and an explanation is provided for the variation of Tn-1 values with position and extent of fluoro-substitution. - Keywords: Fluoro-substitution, phenyl and biphenyl benzoates, terminal cyano namatogens.

SYNTHESIS AND SOME PROPERTIES OF 3-FLUORO-4-CYANOPHENYL 4 prime -n-ALKYLBENZOATES.

A series of 3-fluoro-4-cyanophenyl 4 prime -n-alkylbenzoates, which show monotropic nematic phases, was prepared and their transition temperatures and melting enthalpies were measured. The 3-fluoro-4-cyanophenyl 4 prime -n-propylbenzoate, 3-chloro-4-cyanophenyl 4 prime -n-propylbenzoate and 4-cyanophenyl 4 prime -n-propylbenzoate were mixed with a nematic mixture (A) of 4-n-alkoxyphenyl 4 prime -n-alkylcyclohexane-1 prime -carboxylates. 3-Fluoro-4-cyanophenyl 4 prime -n-propylbenzoate decreases the N-I transition temperature less, increases the birefringence more, and increases the bulk viscosity less than 3-chloro-4-cyanophenyl 4 prime -n-propylbenzoate, and reduces the threshold voltage to the greatest extent. The dielectric anisotropies of 3-fluoro-4-cyanophenyl 4 prime -n-propylbenzoate and 4-cyanophenyl 4 prime -n-propylbenzoate determined from a series of solutions of the compounds in nematic mixture (A) are 35. 9 and 29. 6, respectively.