Direct evidences on CH 3 CO 3 formation and attack mechanism are provided through integrated experimental and theoretical results, indicating that hydrogen atom abstraction (HAA) is the most favorable route in the initial step of CH 3 CO 3 -driven phenol oxidation. HAA reaction step is found to...
Defined Atom Stereocenter Count:0 Undefined Atom Stereocenter Count:0 Defined Bond Stereocenter Count:0 Undefined Bond Stereocenter Count:0 Isotope Atom Count:0 Covalently-Bonded Unit Count:3 CACTVS Substructure Key Fingerprint:AAADccBjOAIAAAAAAAAAAAAAAAAAAAAAAAAsAAAAAAAAAAAAAAAAHAAQCCAAAADBAAQAAALAABA...
Hydrogen atom abstraction (HAA) is found to be the rate-limiting step in all these systems, with the open-shell electronic states of radical character consistently bearing kinetic advantage over the closed-shell ones Surprisingly, there is no correlation found between the cobalt oxidation state and...
The study uses linoleic fatty acid as a substrate to explore the hydrogen atom abstraction (HAA) reactivity of both hydroxo and aqua complexes. The investigation highlights the substitution effect of the L5R ligand on reactivity, revealing a higher rate when an electron-withdrawing ...
transfers as net hydrogen atom ion (HAA) steps using the 2,4,6‐tri‐tert‐butylphenoxyl radical (tBu3ArO.) as the H atom acceptor. Employing an excess of tBu3ArO. under 1?atm of NH3 gas at 23?°C resulted in up to ten turnovers. Nitrogen isotopic (15N) labeling studies provide in...
The cleavage of six N-H bonds and the formation of an N equivalent to N bond was achieved by coupling H+ and e(-) transfers as net hydrogen atom abstraction (HAA) steps using the 2,4,6-tri-tert-butylphenoxyl radical ((Bu3ArO.)-Bu-t) as the H atom acceptor. Employing an excess...
The cleavage of six N〩 bonds and the formation of an NN bond was achieved by coupling H+ and etransfers as net hydrogen atom abstraction (HAA) steps using the 2,4,6‐tri‐tert‐butylphenoxyl radical (tBu3ArO) as the H atom acceptor. Employing an excess of tBu3ArO under 1 atm of ...
Despite impressive advances in transition-metal-catalyzed C(sp(3))-H activation, the radical-initiated process via hydrogen atom abstraction (HAA) of C(sp(3))-H bonds represents a more appealing strategy owing to the mild reaction conditions and good regioselectivity. Given the importance of ...
Formation of orthophenylinendiimine (OPDI) from ortho-NH2-phenylazide (Y = NH2) is also associated with hydrogen atom abstraction of the Co(III) nitrene radical from the NH2 substituent in the ortho position. As a result, aza compound 8 is obtained. Attempts to react ortho substituted ...