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Natural-Abundance ^(15)N Nuclear Magnetic Resonance Spectroscopy of Coronands, Cryptands, and Some of Their Complexes with Diamagnetic Metal Ions

Foerster, Hans G. and Roberts, John D. (1980) Natural-Abundance ^(15)N Nuclear Magnetic Resonance Spectroscopy of Coronands, Cryptands, and Some of Their Complexes with Diamagnetic Metal Ions. Journal of the American Chemical Society, 102 (23). pp. 6984-6988. ISSN 0002-7863. doi:10.1021/ja00543a013. https://resolver.caltech.edu/CaltechAUTHORS:20151006-132045811

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Abstract

Natural-abundance I5N nuclear magnetic resonance spectra of nitrogen-containing crown ethers, cryptand ligands, and other ligands with pyridine-type nitrogens and their complexes with alkali, alkaline-earth, silver(I), and thallium(I) ions are reported. The complexation shifts tend to go downfield with increasing charge and increasing ionic character of the nitrogen-to-metal-ion bond but upfield with increasing polarizability of the ion. The downfield shifts are generally more pronounced if the ions fit tightly into the cyclic ligand. For those metal ions expected to form essentially covalent bonds to nitrogen, the complexation shifts are not easily predicted. Some of the thallium- and silver-cryptate complexes display sizable one-bond ^(15)N-metal couplings.


Item Type:Article
Related URLs:
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http://dx.doi.org/10.1021/ja00543a013DOIArticle
http://pubs.acs.org/doi/abs/10.1021/ja00543a013PublisherArticle
Alternate Title:Natural-abundance nitrogen-15 nuclear magnetic resonance spectroscopy of coronands, cryptands, and some of their complexes with diamagnetic metal ions
Additional Information:© 1980 American Chemical Society. Received March 18, 1980. Supported by the National Science Foundation and by the Public Health Service, Grant No. GM-11072 from the Division of General Medical Sciences. NATO Postdoctoral Fellow, 1976-1977. We thank Professor Dr. F. Vogtle and coworkers for samples of ligands and also Professor S. I. Chan for helpful discussions.
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Funding AgencyGrant Number
NSFUNSPECIFIED
U.S. Public Health Service (USPHS)GM-11072
NATO Postdoctoral FellowUNSPECIFIED
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Caltech Gates and Crellin Laboratories of Chemistry6187
Issue or Number:23
DOI:10.1021/ja00543a013
Record Number:CaltechAUTHORS:20151006-132045811
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20151006-132045811
Official Citation:Natural-abundance nitrogen-15 nuclear magnetic resonance spectroscopy of coronands, cryptands, and some of their complexes with diamagnetic metal ions Hans G. Foerster and John D. Roberts Journal of the American Chemical Society 1980 102 (23), 6984-6988 DOI: 10.1021/ja00543a013
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:60811
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:06 Oct 2015 21:33
Last Modified:10 Nov 2021 22:39

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