Issue 60, 2020
From the journal:

Chemical Communications

One electron reduction transforms high-valent low-spin cobalt alkylidene into high-spin cobalt(ii) carbene radical†

Amanda Grass,a   James A. Bellow,a   Gregory Morrison,b   Hans-Conrad zur Loye, ORCID logo b   Richard L. Lord ORCID logo *c  and  Stanislav Groysman ORCID logo *a  

* Corresponding authors

a Department of Chemistry, Wayne State University, 5101 Cass Ave, Detroit, MI 48202, USA
E-mail: groysman@chem.wayne.edu

b Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, USA

c Department of Chemistry, Grand Valley State University, 1 Campus Dr, Allendale, MI 49401, USA
E-mail: lordri@gvsu.edu

Abstract

One electron reduction of formally CoIV(OR)2(CPh2) forms the [CoII(OR)2(CPh2)]− anion. Whereas low-spin Co(OR)2([double bond, length as m-dash]CPh2) demonstrated significant alkylidene character, the high-spin [Co(OR)2(CPh2)]− anion features a rare Co(II)–carbene radical. Treatment of [Co(OR)2(CPh2)][CoCp*2] with xylyl isocyanide triggers formation of two new C–C bonds, and is likely mediated by nucleophilic attack of deprotonated CoCp*2+ on a transient ketenimine.

Graphical abstract: One electron reduction transforms high-valent low-spin cobalt alkylidene into high-spin cobalt(ii) carbene radical

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Article information

DOI
https://doi.org/10.1039/D0CC03028G
Article type
Communication
Submitted
26 Apr 2020
Accepted
17 Jun 2020
First published
17 Jun 2020

Chem. Commun., 2020,56, 8416-8419

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One electron reduction transforms high-valent low-spin cobalt alkylidene into high-spin cobalt(II) carbene radical

A. Grass, J. A. Bellow, G. Morrison, H. zur Loye, R. L. Lord and S. Groysman, Chem. Commun., 2020, 56, 8416 DOI: 10.1039/D0CC03028G

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