PC69CH10_Weber ARI 14 March 2018 12:24 Annual Review of Physical Chemistry Characterization of Intermediate Oxidation States in CO2 Activation Leah G. Dodson,1 Michael C. Thompson,2 and J. Mathias Weber2 1JILA and NIST, University of Colorado, Boulder, Colorado 80309-0440, USA; email:
[email protected] 2JILA and Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0440, USA; email:
[email protected],
[email protected] ANNUAL REVIEWS Further Click here to view this article's online features: • Download figures as PPT slides • Navigate linked references • Download citations • Explore related articles • Search keywords Annu. Rev. Phys. Chem. 2018. 69:231–52 Keywords First published as a Review in Advance on carbon dioxide, formate, oxalate, carbonate, C–O activation, CO2 February 28, 2018 Annu. Rev. Phys. Chem. 2018.69:231-252. Downloaded from www.annualreviews.org reduction catalysis Access provided by University of Colorado - Boulder on 04/23/19. For personal use only. The Annual Review of Physical Chemistry is online at physchem.annualreviews.org Abstract https://doi.org/10.1146/annurev-physchem- Redox chemistry during the activation of carbon dioxide involves changing 050317-021122 the charge state in a CO2 molecular unit. However, such changes are usually Copyright c 2018 by Annual Reviews. not well described by integer formal charges, and one can think of COO All rights reserved functional units as being in intermediate oxidation states. In this article, we discuss the properties of CO2 and CO2-based functional units in various charge states. Besides covering isolated CO2 and its ions, we describe the CO2-based ionic species formate, oxalate, and carbonate.