Issue 24, 2016

Monoanionic bis(carbene) pincer complexes featuring cobalt(I–III) oxidation states

Abstract

The synthesis and characterization of a series of cobalt complexes featuring a pincer bis(carbene) ligand of the meta-phenylene-bridged bis-N-heterocyclic carbene (ArCCC, Ar = 2,6-diispropylphenyl or mesityl) are reported. Cleavage of the aryl C–H bond of the ligand was achieved in a one-pot metalation procedure using Co(N(SiMe3)2)2(py)2, an equivalent of exogenous base, and trityl chloride to form the (DIPPCCC)CoCl2py complex. This species could be reduced to the Co(II) and Co(I)–N2 molecules with the appropriate equivalents of reductant. Subsequent generation of (MesCCC)CoI–III derivatives with the mesityl ligand proceeded in good yields. A suite of characterization techniques and the interconversion between all three oxidation states of the cobalt complexes is described.

Graphical abstract: Monoanionic bis(carbene) pincer complexes featuring cobalt(I–III) oxidation states

Supplementary files

Article information

Article type
Paper
Submitted
02 ธ.ค. 2558
Accepted
08 ม.ค. 2559
First published
18 ม.ค. 2559

Dalton Trans., 2016,45, 9805-9811

Monoanionic bis(carbene) pincer complexes featuring cobalt(I–III) oxidation states

A. D. Ibrahim, K. Tokmic, M. R. Brennan, D. Kim, E. M. Matson, M. J. Nilges, J. A. Bertke and A. R. Fout, Dalton Trans., 2016, 45, 9805 DOI: 10.1039/C5DT04723D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements