ISSN:
0021-8383
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Synthesis and π-Electronic Structure of 2,5-Bis(alkylamino)-terephthalic Acid Diethyl Ester2,5-Dioxocyclohexane-1,4-dicarboxylic acid diethyl ester 1 reacts with primary alkylamines 2 to 2,5-bis-(alkyl-amino)-cyclohexa-1,4-diene-1,4-dicarboxylic acid diethyl ester 3. The dehydrogenation of 3 by means of bromine or chloranil leads to 2,5-bis(alkylamino) terephthalic acid diethyl ester 4. Electronic spectra and quantumchemical calculations according the SCF-LCI method indicated that the absorption proporties of 4 in the visible spectral region follow the general pattern of substituted aromatic compounds. A merocyanine-like electronic structure seems to be less probable.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/prac.19793210604
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