Hydrogen atom abstraction by a chromium IV oxo complex derived from O2.
The Cr(III) hydroxide [TptBu,MeCr(OH)(pz'H)] BARF (1) is produced by reaction of [TptBu,MeCr(pz'H)]BARF with [TptBu,MeCr(O2)(pz'H)]BARF or oxygen atom donors ONMe3 or PhIO in Et2O. However, reaction of [TptBu,MeCr(pz'H)]BARF with PhIO in pure CH2Cl2 yields the Cr(IV) oxo complex [TptBu,MeCr(O)(pz'H)]BARF (2). 2 abstracts hydrogen atoms from organic molecules with weak C-H bonds to form 1. Both 1 and 2 have been structurally characterized.
Qin
Kun
K
Department of Chemistry and Biochemistry, Center for Catalytic Science and Technology, University of Delaware, Newark, DE 19716, USA.
Incarvito
Christopher D
CD
Rheingold
Arnold L
AL
Theopold
Klaus H
KH