高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (6): 957.

• 论文 • 上一篇    下一篇

(E)-2-甲基-1,3-戊二烯的振动光谱及其稳定构象的研究

赵冰1, 徐蔚青1, 刘举正2   

  1. 1. 吉林大学分子光谱与分子结构开放实验室, 长春 130023;
    2. 吉林大学化学系, 长春 130023
  • 收稿日期:1995-06-22 出版日期:1996-06-24 发布日期:1996-06-24
  • 通讯作者: 赵冰,男,32岁,博士,副教授.
  • 作者简介:赵冰,男,32岁,博士,副教授.
  • 基金资助:

    国家自然科学基金

Studies of Molecular Conformation of (E)-2-Methyl-1,3-pentadiene with Vibrational Spectra

ZHAO Bing1, XU Wei-Qing1, LIU Ju-Zheng2   

  1. 1. Key Lab.for Molecular Spectra and Structure, Jilin University, 130023, changchun;
    2. Dept. of Chem., Jilin University, 130023, changchun
  • Received:1995-06-22 Online:1996-06-24 Published:1996-06-24

摘要: 记录了(E)-2-二甲基-1,3-戊二烯的固、液、气态FTIR光谱(400~4000cm-1)和固、液态Raman光谱(50~4000cm-1),观测了685及658cm-1谱线的变温FTIR光谱(-73~10℃).对所得谱图进行的指认分析发现,该化合物存在两种单键旋转构象异构体s-trans和s-cis,由变温FTIR光谱峰强度随温度的变化得到这两种构象互变的ΔH0和ΔS0.

关键词: (E)-2-甲基-1, 3-戊二烯, 振动光谱, s-transs-cis构象异构体

Abstract: Vibrational spectra of (E)-2-methyl-1,3-pentadiene have been recorded over a range of temperature for three phases, and completely assigned.The investigation of a pair bands 658 and 686 cm-1 by dynamic FTIRspectra shows that the compound existed as a mixture of s-trans and s-cis conformers of single bonding rotation.By means of observed changes of the peak intensities of FTIRspectra with variable temperature, the values of ΔH0 and ΔS0 of the isomer inversion have been deduced to be 5.36 kJ/mol and 7.66 J/mol· Krespectively.

Key words: (E)-2-Methyl-1,3-pentadiene, Vibrational spectra, s-trans and s-cis conformers

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