78022-18-1

Upstream product

• 868-85-9 Dimethyl phosphite 
• 612-13-5 2-cyanobenzyl chloride 
• 121-45-9 phosphorous acid trimethyl ester 

Downstream Products

• 63443-11-8 4-(2-Cyanostyryl)benzaldehyde 
• 78022-13-6 C₄₀H₂₈N₂ 
• 78022-17-0 5,6-Dimethyl-2-(4-(2-cyanostyryl)styryl)benzoxazole 
• 78022-16-9 1-(2-Cyanostyryl)-4-(4-methoxycarbonylstyryl)benzene 
• 78022-15-8 1-(4-Chlorostyryl)-4-(2-cyanostyryl)benzene 
• 78022-14-7 1-(2-Methylstyryl)-4-(2-cyanostyryl)benzene 

Relevant academic research and scientific papers

Heat capacity and enthalpy of formation of trimethyl phosphite, 2-chloromethylbenzonitrile, and 2-dimethylphosphonomethylbenzonitrile

The heat capacities, Cp, of trimethyl phosphite, 2-dimethylphosphonomethylbenzonitrile, and 2-chloromethylbenzonitrile are measured with an adiabatic calorimeter, and the standard enthalpies of formation, ΔfH°(298.15 K) (l or cr), for the three substances are determined. For this purpose, Cp(T) values of trimethyl phosphite and 2-dimethylphosphonomethylbenzonitrile are measured in the temperature range from (298.15 to 350.32) K, and the Cp(T) curves of 2-chloromethylbenzonitrile are also obtained for the crystal (300.35 to 329.00 K) and the liquid (337.26 to 372.45 K), respectively. The deviation of experimental heat capacities from the corresponding smoothed values lies within ± 1.5%. A fusion transition phenomenon is found from the Cp(T) curves of 2-chloromethylbenzonitrile, and the enthalpy of fusion is measured with a differential scanning calorimeter (DSC). The gas-phase standard enthalpies of formation, ΔfH°(g, 298.15 K), of the three compounds are evaluated by the Benson group additive method. The critical temperature Tc, critical pressure Pc, and enthalpy of vaporization ΔvapH° of the compounds are also calculated by different group additive methods. On the basis of the above data, the values of ΔfH°(1, 298.15 K) of trimethyl phosphate and 2-dimethylphosphonomethylbenzonitrile and of ΔfH°-(cr, 298.15 K) of 2-chloromethylbenzonitrile are estimated. A thermochemical cycle including a chemical reaction is designed to examine the reliability of the values by measuring the heat of reaction. The result shows that the enthalpies of formation, ΔfH°(298.15 K) (1 or cr), for the three substances are acceptable.

SYMMETRICAL AND UNSYMMETRICAL DERIVATIVES OF DISTYRYLBENZENE

The symmetrically substituted derivatives I-V of 1,4-distyrylbenzene have been prepared via the Horner reaction.A modification of the latter enabled preparation of unsymmetrical derivatives of 1,4-distyrylbenzene.