Comparison of GIAO and CSGT for calculating 13C and 15N nuclear magnetic resonance chemical shifts of substituent neutral 5-aminotetrazole and 5-nitrotetrazole compounds
Article first published online: 23 JAN 2012
Copyright © 2012 John Wiley & Sons, Ltd.
Magnetic Resonance in Chemistry
Volume 50, Issue 1, pages 16–21, January 2012
How to Cite
Li, Y., Gao, H., Zhang, J., Li, S. and Zhou, W. (2012), Comparison of GIAO and CSGT for calculating 13C and 15N nuclear magnetic resonance chemical shifts of substituent neutral 5-aminotetrazole and 5-nitrotetrazole compounds. Magn. Reson. Chem., 50: 16–21. doi: 10.1002/mrc.2840
- Issue published online: 6 MAR 2012
- Article first published online: 23 JAN 2012
- Manuscript Revised: 20 SEP 2011
- Manuscript Accepted: 20 SEP 2011
- Manuscript Received: 21 JUL 2011
- Ministry of Science and Technology, China. Grant Number: 2009CB118801
- Chinese Universities Scientific Fund. Grant Number: 2011JS035
- 13C and 15N NMR;
The comparison of the gauge-including atomic orbital (GIAO) and the continuous set of gauge transformation methods for calculating nuclear magnetic chemical shifts (CSs) mainly at density functional levels of theory are presented. Isotropic 13 C and 15 N magnetic CS for 14 compounds of tetrazoles are reported. Compared with establishing a convenient and consistent protocol to be employed for confirming the experimental 13 C and 15 N NMR spectra of tetrazole compounds, different combinations of functionals and basis sets were considered. The most reliable results were obtained at GIAO/B3LYP/aug-cc-pVDZ with integral equation formulation for the polarizable continuum model (PCM), which has the smallest root mean square errors and can be used to calculate 13 C and 15 N NMR CS with a very high accuracy for tetrazoles. These results show that the accurately calculated 15N NMR CS of tetrazoles could be used for the evaluation of the intrinsic relationship between structure and explosive properties. Copyright © 2012 John Wiley & Sons, Ltd.