Chinese Journal of Magnetic Resonance ›› 1997, Vol. 14 ›› Issue (3): 257-261.

Previous Articles     Next Articles

RULE AND ESSENCE OF CHEMICAL SHIFT

Li Linsheng   

  1. Institute of Applied Chemistry, Nothwest Institute of Light Industry, Xianyang Shanxi 712081
  • Received:1996-10-15 Revised:1996-12-09 Published:1997-06-05 Online:2018-01-22

Abstract: The basic values and parameters in the formulas for calculating chemical shifts and their relationship to molecular structure were discussed. The results reveal that the main factor to influence chemical shifts of a spill nuclei was the electron cloud density around the nuclei (including the electron cloud distribution).

Key words: NMR, Chemical shift, Deshielding parameters, Electron density around nuclei