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Ab initio 13C nuclear shielding calculations for some solid amino acids using the GIAO procedure

✍ Scribed by Yong He; Donghui Wu; Lianfang Shen; Baiwen Li; Graham A. Webb

Publisher: John Wiley and Sons
Year: 1995
Tongue: English
Weight: 370 KB
Volume: 33
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260330902

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✦ Synopsis

Abstract

The results of ab initio GIAO‐CHF ^13^C nuclear shielding calculations for some solid amino acids, performed with the 6—311G** and a locally dense basis set are reported. Comparison of the present calculation with the observed shieldings shows an RMS error of 6.6 ppm. Shieldings of the carbon nuclei which are multiply bonded are strongly influenced by electron correlation effects. Experimental molecular geometries used in these calculations were taken from crystal structures of amino acids.

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