Detail of "21643-38-9"

Reference

Alkylcyclohexanecarboxylic acids

Alkylcyclohexanecarboxylic acids. II. Hydrogenation of 4-alkylbenzoic acids in a medium of sodium alcoholates. Kovshev, E. I.; Karamysheva, L. A.; Geivandova, T. A.; Roitman, K. V.; Torgova, S. I. (Nauchno-Issled. Inst. Org. Poluprod. Krasitelei, Moscow, USSR). Zh. Prikl. Khim. (Leningrad), 56(11), 2550-3 (Russian) 1983. CODEN: ZPKHAB. ISSN: 0044-4618. DOCUMENT TYPE: Journal CA Section: 24 (Alicyclic Compounds) 4-RC6H4CO2H [R = Bu, hexyl(I)] redn. with Na in n-C5H11OH to give mixts. 21643-38-9 and 80361-47-3 which are cas registry numbers of substances are two of reagents here. of cis- and trans-alkylcyclohexanecarboxylic acids was accompanied by alkoxide-catalyzed interconversion of the products. The trans:cis ratio increased with the reaction temp. at 78-150°. 4-Hexyl-3-cyclohexene-1-carboxylic acid, stable to the reaction conditions, was also identified in the product mixt. of I. .

Ordering of p-n-alkylbenzoic acids (nBAC) having four, five, and six alkyl chain carbon atoms - a computational analysis

Some chemicals with cas registry numbers like 21643-38-9 and 20651-71-2 are also used. Ordering of p-n-alkylbenzoic acids (nBAC) having four, five, and six alkyl chain carbon atoms - a computational analysis. Ojha, Durga Prasad (Centre for Liquid Crystal Research and Education, Faculty of Physical Sciences, Nagarjuna University, Nagarjuna Nagar 522510, India). Annalen der Physik (Weinheim, Germany), 13(6), 357-367 (English) 2004 Wiley-VCH Verlag GmbH & Co. KGaA. CODEN: ANPYA2. ISSN: 0003-3804. DOCUMENT TYPE: Journal CA Section: 75 (Crystallography and Liquid Crystals) Section cross-reference(s): 22 A computational anal. of ordering in p-n-alkylbenzoic acids, having 4 (4BAC), 5 (5BAC), and 6 (6BAC) alkyl chain C atoms, was carried out based on quantum mechanics and intermol. forces. The evaluation of at. charge and dipole moment at each at. center was carried out through an all-valance electron (CNDO/2) method. The modified Rayleigh-Schrodinger perturbation theory along with multicentered-multipole expansion method was employed to evaluate long-range intermol. interactions while a 6-exp potential function was assumed for short-range interactions. The total interaction energy values obtained through these computations were used to calc. the probability of each configuration at room temp., nematic-isotropic transition temp. and above transition temp. using the Maxwell-Boltzmann formula. A comparative picture of mol. parameters like total energy, binding energy, and total dipole moment was given. A model was developed to describe the nematogenicity of these acids in terms of their relative order with mol. parameter introduced in this article. .