Johns, S. R. and Smith, Robert A. and Hawkes, Geoffrey E. and Roberts, John D. (1973) 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. Proceedings of the National Academy of Sciences of the United States of America, 70 (3). pp. 939-940. ISSN 0027-8424 http://resolver.caltech.edu/CaltechAUTHORS:JOHpnas73
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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 α and ß 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.
|Additional Information:||© 1973 by the National Academy of Sciences. Contributed by John D. Roberts, January 2, 1973. This work was supported by the National Science Foundation, and the Public Health Service, Research Grant GM-11072 from the Division of General Medical Sciences. Contribution no. 4485 from the Gates and Crellin Laboratories of Chemistry. G.E.H. was a NATO Postdoctoral Fellow, 1970-1972.|
|Subject Keywords:||complexes; spin polarization; α-carbon shifts; β-carbon shifts|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||31 Jul 2007|
|Last Modified:||26 Dec 2012 09:36|
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