Showing papers on "Hexane published in 1971"
79 citations
TL;DR: In this article, the effect of the support on the hydrogenolysis of hexane isomers was also investigated in the case of platinum and nickel catalysts, and it was found that the differences observed between nickel and platinum were preserved on all supports used.
64 citations
TL;DR: The vapor and liquid phase infrared spectra (376-4000 cm −1 ) and the liquid phase Raman spectra with polarizations (with polarizations) of cyclohexane and cyclo hexane-d 12 are presented in this article.
60 citations
01 Jun 1971
38 citations
38 citations
TL;DR: In this paper, the enthalpies and volumes of mixing at 25 °C and atmospheric pressure were reported for mixtures of n -hexane and n -heptane with carbon tetrachloride, chloroform, and dichloromethane.
33 citations
01 Jan 1971
29 citations
17 citations
11 citations
8 citations
TL;DR: In this article, the 17-, 16-, 15, and 13-phenyl isomers of phenylsteaic acid and related compounds made by the Firedel-Crafts reaction were used as referebce compounds to correct the distribution curve based on alkyl aryl ketones formed by chromic acid oxidation.
Abstract: Alternate use of acetone and hexane as crystallizing solvents permitted the isolation of the 17-, 16-, 15- and 13-phenyl isomers of phenylsteaic acid and related compounds made by the Firedel-Crafts reaction. The pure crystalline isomers were used as referebce compounds to correct the distribution curve based on alkyl aryl ketones formed by chromic acid oxidation.
TL;DR: The enthalpies of combustion of trans-2,3- and 1,4- dimethyl-bicyclo(2,2,1)heptanes, 2-methyl-, cis-5-ethylidene-bicycle-cyclo-nodes-2.2, 1.4-hexane, and 1-methyl-bicylo(3,1,0)hexane were determined in a static bomb calorimeter.
TL;DR: In this article, the authors showed that the efficiency of the positive ion reaction under pressure implies that the ratio of positive ion activation is independent of pressure, and that the volume of activation for the hydrogen atom reaction with n-hexane is essentially the same as that for the reaction with hexene-1.
Abstract: The yield of hydrogen from pure hexane, G(H2) = 5.3 ± 0.2 was independent of pressure in the range 1 bar to 4.6 kbars. The G values of H2, HD, and D2 obtained from 11 mol% C6D14 in C6H14 were independent of pressure and were respectively, 4.85, 0.34, and 0.11. The electron and hydrogen atom scavenging efficiencies of carbon tetrachloride and hexadiene-1,3, and the hydrogen atom scavenging efficiency of hexene-1 were independent of pressure. The positive ion scavenging efficiencies of benzene and aniline increased with increasing pressure. The volume of activation for the hydrogen atom reaction with n-hexane is essentially the same as that for the reaction with hexene-1. The pressure dependence of the charge scavenging reactions has been interpreted in terms of the kinetics of spur processes. The treatment is consistent with the fact that the efficiency of the electron scavenging reactions is independent of pressure. The increased efficiency of positive ion reaction under pressure implies that the ratio of...
TL;DR: In this article, phase diagrams at temperatures above 0°C are presented for the three systems n -hexane + 2-methylnaphthalene, n-hexane+ 2-chloronaphthalenes, and n - hexane+2,3-dimethylnaphthalene.
Patent•
24 Nov 1971TL;DR: In this article, the authors present a contour of the structure of the Z-axis of a Z-cycle, where R3 and R31 are EACH HYDROGEN, LOWER ALKYL of 1 TO 6 CARBON ATOMS, LOW ALKANOYL of 2 TO 4 CARBon ATOMs, DILOWER ALkyLAMINOMETHYL whereIN the lower ALkyls CONTAIN 2 TO 5 CARbon AToms; R4 and R41 ARE EACH HOGEN OR MERCAP
Abstract: 1. A COMPOUND OF THE STRUCTURE 1-((R3)1-),2,5-DI(O=),3,6-BIS(1-AZABICYCLO(3,1,0)- HEX-2-YL-),3-R4,4-R3,6-((R4)1-)-PIPERAZINE WHEREIN R3 AND R31 ARE EACH HYDROGEN, LOWER ALKYL OF 1 TO 6 CARBON ATOMS, LOWER ALKANOYL OF 2 TO 4 CARBON ATOMS, DILOWER ALKYLAMINOMETHYL WHEREIN THE LOWER ALKYLS CONTAIN 2 TO 5 CARBON ATOMS; R4 AND R41 ARE EACH HYDROGEN OR MERCAPTO.
01 Jan 1971
TL;DR: In this article, a method for the preparation of 14 C-β-carotene was discussed and it was found that multiple crystallization gives higher yield and greater purity than any other method.
Abstract: Publisher Summary Most of the systems used for study of carotenogenesis are deficient in either yield of β-carotene or incorporation of label. This chapter discusses method for the preparation of 14 C-β-carotene. It is found that multiple crystallization gives higher yield and greater purity than any other method. Evaporate the chromatographic fraction to dryness in vacuum and redissolve in a minimum volume of boiling hexane, about 1 ml of hexane per milligram of carotene. The minimum volume can be determined by removing hexane vapors with a stream of nitrogen while warming the flask in a water or steam bath until an insoluble ring of carotene begins to form. Specific activity can be conveniently determined by measuring the amount of β-carotene spectrophotometrically and counting a known amount in suitable 14 C counting systems. Spectrophotometric determination in hexane at 450 nm using an absorption coefficient of 0.250 mg per liter gives excellent agreement with gravimetric determination.