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Chromium Corroles in Four Oxidation States

Meier-Callahan, Alexandre E. and Di Bilio, Angel J. and Simkhovich, Liliya and Mahammed, Atif and Goldberg, Israel and Gray, Harry B. and Gross, Zeev (2001) Chromium Corroles in Four Oxidation States. Inorganic Chemistry, 40 (26). pp. 6788-6793. ISSN 0020-1669. https://resolver.caltech.edu/CaltechAUTHORS:20170424-112811010

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Abstract

We have isolated and characterized chromium complexes of 5,10,15-tris(pentafluorophenyl)corrole [(tpfc)H_3] (1) in four oxidation states:  [(tpfc•)CrO][SbCl_6] (6); [(tpfc)CrO] (2); [(tpfc)CrO][Cp_2Co] (4); and [(tpfc)Cr(py)_2] (3). Complex 6 was prepared both by electrochemical and chemical oxidation of 2; its formulation as a Cr^VO ligand−radical species is based on UV−visible absorption as well as EPR measurements. Cobaltocene reduction of 2 gave 4; it was identified as a diamagnetic d^2 Cr^(IV)O complex from its sharp ^1H NMR spectrum. Reaction of 2 with triphenylphosphine yielded a chromium(III) corrole, [(tpfc)Cr(OPPh_3)_2] (5). Owing to its air sensitivity, 5 could not be isolated in the absence of excess OPPh_3. The structure of the Cr^(III) bis-pyridine complex (3) was determined by X-ray crystallography (Cr−N distances:  1.926−1.952 Å, pyrrole; 2.109, 2.129 Å, pyridine).


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URLURL TypeDescription
http://dx.doi.org/10.1021/ic010723zDOIArticle
http://pubs.acs.org/doi/full/10.1021/ic010723zPublisherArticle
http://pubs.acs.org/doi/suppl/10.1021/ic010723zPublisherSupporting Information
ORCID:
AuthorORCID
Gray, Harry B.0000-0002-7937-7876
Additional Information:© 2001 American Chemical Society. Received 9 July 2001. Published online 20 November 2001. Published in print 1 December 2001. This work was supported by the NSF (H.B.G.), the Bayer Corporation, and the Israel Science Foundation (Z.G.).
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Funding AgencyGrant Number
NSFUNSPECIFIED
Bayer CorporationUNSPECIFIED
Israel Science FoundationUNSPECIFIED
Issue or Number:26
Record Number:CaltechAUTHORS:20170424-112811010
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170424-112811010
Official Citation:Chromium Corroles in Four Oxidation States Alexandre E. Meier-Callahan, Angel J. Di Bilio, Liliya Simkhovich, Atif Mahammed, Israel Goldberg, Harry B. Gray, and Zeev Gross Inorganic Chemistry 2001 40 (26), 6788-6793 DOI: 10.1021/ic010723z
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:76852
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:24 Apr 2017 20:05
Last Modified:22 Nov 2019 09:58

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