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. doi:10.1021/ic010723z. 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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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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Issue or Number: | 26 | ||||||||||||
DOI: | 10.1021/ic010723z | ||||||||||||
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: | 15 Nov 2021 17:03 |
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