Format:
1 Online-Ressource (6 Seiten)
ISSN:
1477-9234
,
1477-9234
Content:
In addition to oxometal [Mn+[double bond, length as m-dash]O] and imidometal [Mn+[double bond, length as m-dash]NR] units, transient metal–iodosylarene [M(n−2)+–O[double bond, length as m-dash]IPh] and metal–iminoiodane [M(n−2)+–N(R)[double bond, length as m-dash]IPh] adducts are often invoked as a possible “second oxidant” responsible for the oxo and imido group transfer reactivity. Although a few metal–iodosylarene adducts have been recently isolated and/or spectroscopically characterized, metal–iminoiodane adducts have remained elusive. Herein, we provide UV-Vis, EPR, NMR, XAS and DFT evidence supporting the formation of a metal–iminoiodane complex 2 and its scandium adduct 2-Sc. 2 and 2-Sc are reactive toward substrates in the hydrogen-atom and nitrene transfer reactions, which confirm their potential as active oxidants in metal-catalyzed oxidative transformations. Oxidation of para-substituted 2,6-di-tert-butylphenols by 2 and 2-Sc can occur by both coupled and uncoupled proton and electron transfer mechanisms; the exact mechanism depends on the nature of the para substituent.
Content:
Peer Reviewed
Note:
Available open access thanks to the RSC Gold for Gold initiative. Shared according to the terms set out in the CC licence.
In:
Dalton Transactions, : The Royal Society of Chemistry, 45,2016,40, Seiten 15994-16000, 1477-9234
Language:
English
URN:
urn:nbn:de:kobv:11-110-18452/19291-1
URL:
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