Abnormal Solvent Effects on Hydrogen Atom Abstractions. 1. The Reactions of Phenols with 2,2-Diphenyl-1-picrylhydrazyl (dpph•) in Alcohols

Download
  1. Get@NRC: Abnormal Solvent Effects on Hydrogen Atom Abstractions. 1. The Reactions of Phenols with 2,2-Diphenyl-1-picrylhydrazyl (dpph•) in Alcohols (Opens in a new window)
AuthorSearch for: ; Search for:
TypeArticle
Journal titleJournal Of Organic Chemistry
ISSN00223263
Volume68
Issue9
Pages34333438; # of pages: 6
AbstractRate constants, , for hydrogen atom abstraction from 13 hindered and nonhindered phenols by the diphenylpicrylhydrazyl radical, dpph, have been determined in n-heptane and a number of alcoholic and nonalcoholic, hydrogen-bond accepting solvents. Abnormally enhanced values of have been observed in alcohols. It is proposed that this is due to partial ionization of the phenols and a very fast electron transfer from phenoxide anion to dpph. The popular assessment of the antioxidant activities of phenols with dpph in alcohol solvents will generally lead to an overestimation of their activities.
Publication date
Linkhttp://pubs3.acs.org/acs/journals/doilookup?in_doi=10.1021/jo026917t
AffiliationNational Research Council Canada; NRC Steacie Institute for Molecular Sciences
Peer reviewedNo
Identifier10008226
NPARC number12338325
Export citationExport as RIS
Report a correctionReport a correction
Record identifierd175d3ad-9bc2-447c-9481-cd3b1eb32989
Record created2009-09-10
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)