NDLI: Spectroscopic and Thermodynamic Studies on Charge Transfer Complex Formation between 2-Aminopyridine and 2,5-Dihydroxy-p-benzoquinone

Content Provider	SpringerLink
Author	Al Ahmary, Khairia M. Habeeb, Moustafa M. Al Solmy, Eman A.
Copyright Year	2010
Abstract	Charge transfer complex formation between 2-aminopyridine (2AP) as the electron donor with 2,5-dihydroxy-p-benzoquinone (AHBQ) as the π-electron acceptor has been investigated spectrophotometrically in acetonitrile (AN) and 50% acetonitrile + 50% 1,2-dichloroethane (V/V), (ANDC). The stoichiometry of the complex has been identified by Job’s method to be 1:1. The Benesi-Hildebrand equation has been applied to estimate the formation constant (K $_{CT}$) and molecular extinction coefficient (ε). It was found that the value of K $_{CT}$ is larger in ANDC than in AN. The thermodynamic parameters are in agreement with the K $_{CT}$ values in that the enthalpy of formation (−ΔH) has a larger value in ANDC than in AN, suggesting higher stability of the complex in ANDC. The complex formed between 2AP and DHBQ has been isolated as a solid and characterized using elemental analysis, FTIR, and $^{1}$H NMR measurements. Moreover, it has been found that the formed complex involves proton transfer in addition to charge transfer.
Starting Page	1264
Ending Page	1277
Page Count	14
File Format	PDF
ISSN	00959782
Journal	Journal of Solution Chemistry
Volume Number	39
Issue Number	9
e-ISSN	15728927
Language	English
Publisher	Springer US
Publisher Date	2010-09-25
Publisher Place	Boston
Access Restriction	Subscribed
Subject Keyword	Spectrophotometry CT-complex 2-Aminopyridine 2,5-Dihydroxy-p-benzoquinone Condensed Matter Physics Inorganic Chemistry Oceanography Geochemistry Industrial Chemistry/Chemical Engineering Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Molecular Biology Biochemistry Physical and Theoretical Chemistry Biophysics

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