标题：Nuclear Magnetic Resonance Shift Reagents: Evidence for Different Mechanisms of Contact Contributions to 13C Shifts Induced by Nickel and Cobalt Acetylacetonates with Saturated Amines and Alcohols
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1973
卷号：70
期号：3
页码：939-940
DOI：10.1073/pnas.70.3.939
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：The pattern of 13C and 1H nuclear magnetic resonance (NMR) shift changes produced by complexation of cobalt and nickel acetylacetonates with amines and alcohols indicates that there is more than one mode of operation of the contact interaction. A large effect with alternating signs is important at the [alpha] and {beta} carbons, but this effect seems to be overlaid by another influence that appears to fall off monotonically as one proceeds away from the site of complexation.
