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Another Unprecedented Wieland Mechanism Confirmed: Hydrogen Formation from Hydrogen Peroxide, Formaldehyde, and Sodium Hydroxide

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dc.abstract.enIn 1923, Wieland and Wingler reported that in the molecular hydrogen producing reaction of hydrogen peroxide with formaldehyde in basic solution, free hydrogen atoms (HC) are not involved. They postulated that (hydroxymethyl)peroxide, HOCH2OOCH2OH, is the intermediate, which decomposes to yield H2 and formate, proposing a mechanism that would nowadays be considered as a “concerted process”. Since then, several other (conflicting) “mechanisms” have been suggested. Our NMR and Raman spectroscopic and kinetic studies, particularly the determination of the deuterium kinetic isotope effect (DKIE), now confirm that in this base-dependent reaction, both H atoms of H2 derive from the CH2 hydrogen atoms of formaldehyde, and not from the OH groups of HOCH2OOCH2OH or from water. Quantum-chemical CBSQB3 and W1BD computations show that H2 release proceeds through a concerted process, which is strongly accelerated by double deprotonation of HOCH2OOCH2OH, thereby ruling out a free radical pathway.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorKorth, Hans-Gert
dc.contributor.authorIngold, Keith U.
dc.contributor.authorLitwinienko, Grzegorz
dc.contributor.authorCzochara, Robert
dc.date.accessioned2024-01-24T16:39:58Z
dc.date.available2024-01-24T16:39:58Z
dc.date.issued2018
dc.description.financeNie dotyczy
dc.description.number29
dc.description.volume57
dc.identifier.doi10.1002/ANIE.201800636
dc.identifier.issn1433-7851
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/100760
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofAngewandte Chemie - International Edition
dc.relation.pages9146-9149
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enH2O2–formaldehyde reaction
dc.subject.enhistory of science
dc.subject.enhydrogen formation
dc.subject.enperoxides
dc.subject.enreaction mechanisms
dc.titleAnother Unprecedented Wieland Mechanism Confirmed: Hydrogen Formation from Hydrogen Peroxide, Formaldehyde, and Sodium Hydroxide
dc.typeJournalArticle
dspace.entity.typePublication