Document Detail


Bulk Gas-Phase Acidity.
MedLine Citation:
PMID:  22730176     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The capability of a gaseous Brønsted acid HB to deliver protons to a base is usually described by the gas-phase acidity (GA) value of the acid. However, GA values are standard Gibbs energy differences and refer to individual gas pressures of 1 bar for acid HB, base B(-) , and proton H(+) . We show that the GA value is not suited to describe the bulk acidity of a gaseous acid. Here the pressure dependence of the activities of HB, H(HB)(n) (+) , and B(HB)(m) (-) that result from gaseous autoprotolysis have to be considered. In this work, the pressure-dependent absolute chemical potential of the proton in the representative gaseous proton acids CH(4) , NH(3) , H(2) O, HF, and HCl was worked out and the general theory to describe bulk gas phase acidity-that can directly be compared with solution acidity-was developed.
Authors:
Daniel Himmel; Sascha K Goll; Ivo Leito; Ingo Krossing
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-6-21
Journal Detail:
Title:  Chemistry (Weinheim an der Bergstrasse, Germany)     Volume:  -     ISSN:  1521-3765     ISO Abbreviation:  -     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-6-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9513783     Medline TA:  Chemistry     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Affiliation:
Institut für Anorganische und Analytische Chemie, Freiburger Materialforschungszentrum (FMF) and, Freiburg Institute for Advanced Studies (FRIAS), Universität Freiburg, Albertstrasse 19, 79104 Freiburg (Germany).
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