高等学校化学学报

高等学校化学学报 ›› 1985, Vol. 6 ›› Issue (5): 447.

• 研究论文 • 上一篇    下一篇

用13C的NMR T1研究苯环上甲基的内旋转

谢狄霖1, 王金山1, 陈亮2, 胡玉仙2   

  1. 1. 北京师范大学无线电电子学系;
    2. 山西大学化学系
  • 收稿日期:1983-12-21 出版日期:1985-05-24 发布日期:1985-05-24

Studies on Internal Rotation of Methyl in Substituted Benzene by Using 13C NMR Spin-lattice Relaxation Time

Xie Dilin1, Wang Jinslian1, Chen Liang2, Hu Yu xian2   

  1. 1. Department of Eadio Electronice, Beijing Normal University, Beijing;
    2. Department of Chemisty, Shanxi University, Taiyuan
  • Received:1983-12-21 Online:1985-05-24 Published:1985-05-24

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摘要： 提出了通过对样品进行邻位取代和间位取代以从实验上测定自旋-内旋转弛豫速率的处理方法.在28—90℃的温度范围内测量了邻二甲苯和间二甲苯的甲基碳的T1和NOE因子.分离得间二甲苯上甲基碳的自旋-内旋转弛豫速率和自旋-整体旋转弛豫速率,并计算得甲基的内旋转速率.

Abstract: Amethod for determinating the spin-internal rotation relaxation rate of methyl by ortho-subslituting and meta-substituting the sample ( toluene ) is suggested. Spin-lattice relaxation times ( T1 ) and nuclear Overhauser effect ( NOE ) of 13Cin the methyl of ο-xylene and m-xylene between 28℃ and 90℃ are measured. The spin-whole rotation relaxation rate and spin-internal rotation relaxation rate of 15Cin the methyl of m-xylene are separated, with the internal rotation rate of the methyl calculated.

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