TEMPO coordination and reactivity in group 6; pseudo-pentagonal planar (η2-TEMPO)2CrX (X = Cl, TEMPO)

Ann K Kayser; Peter T Wolczanski; Thomas R Cundari; Melissa M Bollmeyer; Kyle M Lancaster; Samantha N MacMillan

doi:10.1039/d2cc03838b

TEMPO coordination and reactivity in group 6; pseudo-pentagonal planar (η²-TEMPO)₂CrX (X = Cl, TEMPO)

Chem Commun (Camb). 2022 Aug 30;58(70):9818-9821. doi: 10.1039/d2cc03838b.

Authors

Ann K Kayser¹, Peter T Wolczanski¹, Thomas R Cundari², Melissa M Bollmeyer¹, Kyle M Lancaster¹, Samantha N MacMillan¹

Affiliations

¹ Dept. of Chemistry and Chemical Biology Baker Laboratory, Cornell University, Ithaca, NY, 14853, USA. ptw2@cornell.edu.
² Dept. of Chemistry, CasCam, University of North Texas, Denton, TX, 76201, USA.

PMID: 35975596
DOI: 10.1039/d2cc03838b

Abstract

The exposure of CrCl₂(THF)₂ to 1 equiv. of TEMPO and 1 equiv. [TEMPO]Na afforded (η²-O,N-TEMPO)₂CrCl (1, 67%); addition of [TEMPO]Na to 1 yielded (η²-O,N-TEMPO)₂Cr(TEMPO) (2). Both 1 and 2 exhibit pseudo-pentagonal planar (PPP) geometry, instead of myriad alternatives. Calculations and spectral studies suggest the solid-state geometry persists in solution.

MeSH terms

Cyclic N-Oxides*
Models, Molecular

Substances

Cyclic N-Oxides
TEMPO