Polarographic and spectrophotometric behaviour of some N-p-phenyl substituted benzamidines

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Title:Polarographic and spectrophotometric behaviour of some N-p-phenyl substituted benzamidines
Creators:
Squella, Juan A.
Nuñez-Vergara, Luis J.
Rodríguez, Hernan
Márquez, Amelia
Rodríguez-Mellado, Jose M.
Blázquez, Manuel
Roldán, Emilio
Dominguez, Manuel
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 56, 12, pp. 2791-2799

Abstract

Five N-<i>p</i>-phenyl substituted benzamidines were studied by DC and DP polarography in a wide pH range. Coulometric results show that the overall processes are four-electron reductions. Logarithmic analysis of the waves indicate that the process are irreversible. The influence of the pH on the polarographic parameters was also studied. A UV spectrophotometric study was performed in the pH range 2-13. In basic media some variations in the absorption bands were observed due to the dissociation of the amidine group. A determination of the p<i>K</i> values was made by deconvolution of the spectra. Correlations of both the electrochemical parameters and spectrophotometric p<i>K</i> values with the Hammett substituent constants were obtained.

Title:Polarographic and spectrophotometric behaviour of some N-p-phenyl substituted benzamidines
Creators:
Squella, Juan A.
Nuñez-Vergara, Luis J.
Rodríguez, Hernan
Márquez, Amelia
Rodríguez-Mellado, Jose M.
Blázquez, Manuel
Roldán, Emilio
Dominguez, Manuel
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:56
Number:12
Page Range:pp. 2791-2799
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19912791UNSPECIFIED
ID Code:5184
Item Type:Article
Deposited On:22 Feb 2010 11:32
Last Modified:22 Feb 2010 10:32

Citation

Squella, Juan A.; Nuñez-Vergara, Luis J.; Rodríguez, Hernan; Márquez, Amelia; Rodríguez-Mellado, Jose M.; Blázquez, Manuel; Roldán, Emilio; Dominguez, Manuel (1991) Polarographic and spectrophotometric behaviour of some N-p-phenyl substituted benzamidines. Collection of Czechoslovak Chemical Communications, 56 (12). pp. 2791-2799. ISSN 0010-0765

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