TEMPO coordination and reactivity in group 6; pseudo-pentagonal planar (η2-TEMPO)2CrX (X = Cl, TEMPO)†,10.1039/D2CC03838B

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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

Chemical Communications Pub Date : 08/05/2022 00:00:00 , 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.