Electron transfer, 151. Decomposition of peroxynitrite as catalyzed by copper(II)

Electron transfer, 151. Decomposition of peroxynitrite as catalyzed by copper(II) The decomposition of peroxynitrite in aqueous solution at pH 9.8–11.1 is catalyzed by copper(II) at the 10–7–10–6 M level. In the presence of added ammonia (0.03 M) or imidazole (0.005 M), reaction rates were as much as 160 times as great as those in copper-free systems. Catalysis was strongly inhibited by glycine, 2,2-bipyridyl, and EDTA. The yield of nitrite from the decomposition, [NO¯2]/[O=NOO¯]taken = 0.26, did not vary significantly with pH or [CuII]. Variation of reaction rates with [H+] and [CuII] is consistent with partition of the catalyst into an acidic form, (cat)HA (pKA 10.2–10.5), a dimer, (catHA)2, and a basic form (cat)A; only the first of these is active. Both transformations are taken to be initiated by CuII-induced homolysis of the O—O bond in peroxynitrite, yielding the reactive intermediate, a species of the type CuIII(OH). The latter may react further with peroxynitrite (ultimately yielding NO¯2 and O2) or with nitrite (yielding NO¯3). It is further suggested that catalytic activity of the type observed requires a substitution-labile CuII(OH2) function. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Electron transfer, 151. Decomposition of peroxynitrite as catalyzed by copper(II)

Loading next page...
 
/lp/springer_journal/electron-transfer-151-decomposition-of-peroxynitrite-as-catalyzed-by-M5ZeFG06OD
Publisher
Brill Academic Publishers
Copyright
Copyright © 2002 by VSP 2002
Subject
Chemistry; Inorganic Chemistry; Physical Chemistry; Catalysis
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1163/15685670260373335
Publisher site
See Article on Publisher Site

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches

$49/month

Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.

$588

$360/year

billed annually
Start Free Trial

14-day Free Trial