Ab initio prediction of 29Si-NMR chemical shifts |
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Authors: | Chu Shidong Li Yingxia Song Ni Guan Huashi |
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Institution: | (1) Institute of Marine Drugs, Ocean University of Qingdao, 266003 Qingdao, P.R. China |
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Abstract: | The ability of several ab initio models to predict experimental 29Si-NMR chemical shift is examined. The shielding values of trimethylsilyl chloride (A), t-butyldimethylsilyl chloride (B)
and allytrimethylsilane (C) are calculated by GIAO, CSGT and IGAIM methods, using HF/6–31G*, B3LYP/6-31G*, HF/6–311+G**, B3LYP/6–311+G** and MPW1PW91/6–311+G** models respectively. The 29Si chemical shifts calculated by GIAO method using HF/6–311+G** model are highly in agreement with those obtained experimentally. All of the models above reproduce the trends of chemical
shifts in all cases studied, suggesting that the models are of practical value. |
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Keywords: | 29Si-NMR Chemical Shift ab initio prediction Density Functional Theory |
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