%0 Journal Article
%T Carbonyl 17O-NMR Chemical Shifts of Substituted Benzamides<br>取代苯甲酰胺的羰基17O-NMR化学位移研究
%A LI Li-dong
%A LI Lin-sheng
%A <br>李利东
%A 李临生
%J 波谱学杂志
%D 2005
%I 
%X This paper provides a equation,  δcal(17O)=δ0n+C×Σ Δ,  for calculating carbonyl 17O chemical shifts of substituted benzamides,  substituted N-methyl benzamides and substituted N, N-dimethyl benzamides. Eleven substituent parameters were obtained by least square linear regression analysis. The equation is checked regressively by 33 carbonyl \{\}\+\{17\}O chemical shifts of these compounds,  and the results show that the confidence limit is 99.5% and the calculating errors (Δδ) of more than 90% of the compounds are less than 1.0 (relative errors less than 0.1%).
%K 17O-NMR<br>化学位移
%K 取代基效应
%K 回归分析
%K 最小二乘法
%K 苯甲酰胺
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=1A3C8C6E452BD1AF5A6B6B99BA3989C9&aid=7C0A5322B2E5289B&yid=2DD7160C83D0ACED&vid=BC12EA701C895178&iid=CA4FD0336C81A37A&sid=B9704B40A4225A24&eid=46CB27789995047D&journal_id=1000-4556&journal_name=波谱学杂志&referenced_num=0&reference_num=11