View : 755 Download: 0

Chromium(IV)-peroxo complex formation and its nitric oxide dioxygenase reactivity

Title
Chromium(IV)-peroxo complex formation and its nitric oxide dioxygenase reactivity
Authors
Yokoyama A.Han J.E.Cho J.Kubo M.Ogura T.Siegler M.A.Karlin K.D.Nam W.
Ewha Authors
남원우조재흥Kenneth D. Karlin
SCOPUS Author ID
남원우scopus; 조재흥scopus
Issue Date
2012
Journal Title
Journal of the American Chemical Society
ISSN
0002-7863JCR Link
Citation
Journal of the American Chemical Society vol. 134, no. 37, pp. 15269 - 15272
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
The O2 and NO reactivity of a Cr(II) complex bearing a 12-membered tetraazamacrocyclic N-tetramethylated cyclam (TMC) ligand, [Cr II(12-TMC)(Cl)]+ (1), and the NO reactivity of its peroxo derivative, [CrIV(12-TMC)(O2)(Cl)]+ (2), are described. By contrast to the previously reported Cr(III)-superoxo complex, [CrIII(14-TMC)(O2)(Cl)]+, the Cr(IV)-peroxo complex 2 is formed in the reaction of 1 and O2. Full spectroscopic and X-ray analysis revealed that 2 possesses side-on ν2-peroxo ligation. The quantitative reaction of 2 with NO affords a reduction in Cr oxidation state, producing a Cr(III)-nitrato complex, [CrIII(12-TMC) (NO3)(Cl)]+ (3). The latter is suggested to form via a Cr(III)-peroxynitrite intermediate. [CrII(12-TMC)(NO)(Cl)] + (4), a Cr(II)-nitrosyl complex derived from 1 and NO, could also be synthesized; however, it does not react with O2. © 2012 American Chemical Society.
DOI
10.1021/ja307384e
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

BROWSE