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Nuclear Magnetic Resonance Spectroscopy. Observation of Carbon-13 Resonances in a Paramagnetic Transition Metal Complex. Nickel(II) N,N'-di(p-tolyl)aminotroponiminate

Doddrell, David and Roberts, John D. (1970) Nuclear Magnetic Resonance Spectroscopy. Observation of Carbon-13 Resonances in a Paramagnetic Transition Metal Complex. Nickel(II) N,N'-di(p-tolyl)aminotroponiminate. Journal of the American Chemical Society, 92 (14). pp. 4484-4486. ISSN 0002-7863. https://resolver.caltech.edu/CaltechAUTHORS:20151013-111508944

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Abstract

The discovery of the extraordinary chemical shifts of the proton magnetic resonances of paramagnetic Ni(II) aminotroponiminates has been of great value for probing the nature of metal-ligand bonding especially because sharp resonances are observed as the result of the short electronic relaxation times of the tetrahedral forms which are associated with the squareplanar (diamagnetic) ⇌ tetrahedral (paramagnetic) equilibria. These complexes are expected to provide a useful starting point for natural-abundance nmr studies of paramagnetic transition metal complexes. We report in this study observation of eight of the possible nine carbon resonances of the N,N’-di(ptolyl) derivative 1, and present evidence for nonzero spin density in the σ framework of the ligand.


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http://dx.doi.org/10.1021/ja00717a072DOIArticle
http://pubs.acs.org/doi/abs/10.1021/ja00717a072PublisherArticle
Additional Information:© 1970 American Chemical Society. Received March 30, 1970. Supported by the National Science Foundation and by the Public Health Service (Grant No. 11072), Division of Research Grants, National Institutes of Health. We are indebted to Dr. R. E. Benson of the Central Research Department of E. I. du Pont de Nemours and Company for samples of the ligand and complex and the reviewers for their helpful comments.
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U.S. Public Health Service (USPHS)GM-11072
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Caltech Gates and Crellin Laboratories of Chemistry4026
Issue or Number:14
Record Number:CaltechAUTHORS:20151013-111508944
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20151013-111508944
Official Citation:Nuclear magnetic resonance spectroscopy. Observation of carbon-13 resonances in a paramagnetic transition metal complex. Nickel(II) N,N'-di(p-tolyl)aminotroponiminate David Doddrell and John D. Roberts Journal of the American Chemical Society 1970 92 (14), 4484-4486 DOI: 10.1021/ja00717a072
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61043
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:15 Oct 2015 03:26
Last Modified:03 Oct 2019 09:03

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