Rotational Barriers and 15N Chemical Shi
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Tomonaga Ozawa; Yuichi Isoda; Hiroshi Watanabe; Tomoaki Yuzuri; Hiroko Suezawa;
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Article
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1997
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John Wiley and Sons
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English
⚖ 361 KB
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Rotational barriers about the CÈN bonds of several N-acyl-N-methyl-a-amino acids and their esters R3COÈ N(R4)ÈCR1R2ÈCOOR5, and also N-Boc-protected dipeptides, were determined and the steric e †ects caused by the substituents R1-R5 are discussed by comparing them with the results of MM3 calculations