摘要
该文用完全线形分析法、磁化强度迁移法和自旋锁定技术等三种具体的DNMR法对含有不同取代基的金属烯烃有机化合物中因碳碳键转动引起的分子内质子的化学交换的动力学行为进行了较为详细的研究。结果表明,测得的化学交换的速率常数是合理的。它们满足Eyring和Ar-rehenuius关系式;由此获得的化学交换的活化能参数和活化自由能的变化与化合物中的取代基的Hammett常数б存在很好的一致关系。
The proton chemical exchanges, created by the rotation of carbon - carbon bond in some Metal-Olefins, were examined with three methods of Dynamic Nuclear Magnetic Resonance. They are Complete Line-shape Analysis, Magnetization Transfer and Spin - Lock. The rate constants of these chemical exchange comply with Eyring or Arrehenuius equation. The activation parameters of chemical exchange have same trends with the Hammett constant of substituents in the Metal-Olefins studied.
出处
《华东师范大学学报(自然科学版)》
CAS
CSCD
北大核心
2003年第2期46-53,共8页
Journal of East China Normal University(Natural Science)
关键词
线形拟合
磁化强度
自旋锁定
DNMR
活化能
化学交换
complete line-shape analysis
magnetization transfer
spin-lock
DNMR
chemical exchange