引用本文:
杨建明, 王户生, 吕剑, 安忠维. 对烷基苯甲酸的催化加氢及其取代基效应[J]. 应用化学,
2002, 19(4): 364-368.
Citation: YANG Jian-Ming, WANG Hu-Sheng, LÜ Jian, AN Zhong-Wei. Hydrogenation of 4-Alklybenzoic Acids and Effect of the Alkyl Group[J]. Chinese Journal of Applied Chemistry, 2002, 19(4): 364-368.
Citation: YANG Jian-Ming, WANG Hu-Sheng, LÜ Jian, AN Zhong-Wei. Hydrogenation of 4-Alklybenzoic Acids and Effect of the Alkyl Group[J]. Chinese Journal of Applied Chemistry, 2002, 19(4): 364-368.
对烷基苯甲酸的催化加氢及其取代基效应
English
Hydrogenation of 4-Alklybenzoic Acids and Effect of the Alkyl Group
Abstract:
4-Alkyl-cyclohexanecarboxylic acids as liquid crystal intermediates were synthesized from hydrogenation of 4-alkylbenzoic acids over Raney Ni. The relation of the alkyl group with the conformational isomer has been investigated. It is found that the longer the length of the alkyl group, the slower the conversion of the acid in NaOH solution. The hydrogen pressure of 7.1 MPa was found to be enough for hydrogenation in a mixed solvent of THF and cyclohexane. The trans/cis isomer ratio of the products was more than 2, and the transformation free energy of the conformational isomer increased with the increase of the carbon atom numbers of the alkyl group.
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