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Arsenazo III and its analogues-IV The electronic structure of arsenzo III in media of different acidity.
MedLine Citation:
PMID:  18960384     Owner:  NLM     Status:  In-Data-Review    
By means of a single method, MOLCAO, the states of arsenazo III in strongly acidic, neutral and alkaline media has been studied. In the range from 1N sulphuric acid to pH 8, when the conjugated groups are not ionized the reagent is found in the azo form. Single stage ionization of the acidic (-OH, -NH-N) or basic (-N(2)-, CO) groups leads to a disruption of the symmetry of the system and to the appearance of the quinone-hydrazone form together with the azoide. The azoide and quinone hydrazone tautomers occur in the ratio 4:1 in concentrated sulphuric acid medium in and 22:3 alkaline medium.
S B Savvin; E L Kuzin
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Talanta     Volume:  15     ISSN:  0039-9140     ISO Abbreviation:  Talanta     Publication Date:  1968 Sep 
Date Detail:
Created Date:  2008-10-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2984816R     Medline TA:  Talanta     Country:  England    
Other Details:
Languages:  eng     Pagination:  913-21     Citation Subset:  -    
Vernadsky Institute of Geochemistry and Analytical Chemistry, Academy of Sciences, Moscow, U.S.S.R.
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