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4240699 
Journal Article 
Spectroscopic study of the complexation of 5,6,14,15-dibenzo-1,4-dioxa-8,12-diazacyclopentadeca-5,14-diene with some polynitrophenol derivatives in chloroform solution 
Sadeghi, S; Shamsipur, M 
1998 
Yes 
Journal of Inclusion Phenomena and Molecular Recognition in Chemistry
ISSN: 0923-0750 
32 
4 
439-451 
WOS:000078280900004 
The complex formation between 5,6,14,15-dibenzo-1,4-dioxa-8, 12-diazacyclopentadeca-5,14-diene (DBDA15C4) and 4-nitrophenol (MNP), 2,4-dinitrophenol (DNP) and 2,4,6-trinitrophenol (TNP) have been studied spectrophotometrically in chloroform solution. The resulting proton transfer-charge transfer complexes are formulated as DBDA15C4.TNP and DBDA15C4.(TNP)(2), confirming characterizations by microchemical analysis and IR spectroscopy. The equilibrium constants for the resulting complexes (K-1 and K-2) were evaluated from the nonlinear least-squares fitting of the absorbance-mole ratio data. The overall stability of the resulting complexes was found to vary in the order TNP > DNP > MNP. The enthalpies and entropies of the successive complexation reactions for the DBDA15C4-TNP system were determined from the temperature dependence of the equilibrium constants. 
DBDA15C4; polynitrophenol; proton transfer charge transfer complexes; chloroform; spectrophotometry; IR