Chinese Journal of Magnetic Resonance ›› 2001, Vol. 18 ›› Issue (2): 175-185.

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ON PRELIMINARY APPROACH TO ESTIMATION AND PREDICTION OF CHEMICAL SHIFT OF CARBON-13 NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY IN ALKANES BASED ON A NOVEL ATOMIC DISTANCE-EDGE VECTOR (MDE OR ν)

CHEN Qi-ting1,2, YUAN Xiao-yan1,3, CAO Chen-zhong4, LIU Shu-shen1,5, LIU Hailing5, LI Zhi-liang1*   

  1. 1.College of Environment and Chemistry and Chemical Engineering (CECCE), Laboratory of Green Chemistry and Molecular Pharmacy (LGCMP), Chongqing University, Chongqing 400044; 2.Department of Applied Chemistry, Changsha Electrical Power University, Changsha 410077; 3.Department of Physics and Chemistry, Changsha University, Changsha 410003; 4.Department of chemistry, Xiangtan Normal University, Xiangtan 411100; 5.Department of Applied Chemistry, Guilin Institute of Technology, Guilin 541004
  • Received:2000-11-27 Revised:2001-02-05 Published:2001-06-05 Online:2001-06-05
  • About author:*Correspondence author
  • Supported by:

    国家春晖计划项目教育部启动基金及霍英东基金资助项目.

Abstract:

Systematic studies were made on carbon-13 nuclear magnetic resonance (13C NMR) and its regularity of chemical shift (CS).  In the present paper, A novel atomic distance-edge (ADE) vector or ν vector expressed in the form of energy was developed and found to be correlated excellently with  the chemical shift (CSC) for carbon-13 nuclear magnetic resonance (13C NMR).  The multiple linear regression (MLR) equations, CSC=+ap3=∑mj=0ajνj+a10p3=a0(ν0=1)+a1ν1+a2ν2+a3ν3+a4ν4+bP3, of atomic modelling were established by the atomic distance-edge vector together with the path count of three bonding segment (C-C-C) It gives very good results  for the modelled estimation and quantitative prediction with cross validation (CV) of leave-one-out (LOO) procedure.

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