Document Details

Document Type : Article In Journal 
Document Title :
Spectroscopic and thermodynamic studies on charge transfer complex formation between 2-aminopyridine and 2,5-dihydroxy-p-benzoquinone
Spectroscopic and thermodynamic studies on charge transfer complex formation between 2-aminopyridine and 2,5-dihydroxy-p-benzoquinone
 
Subject : Chemistry 
Document Language : English 
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 1H NMR measurements. Moreover, it has been found that the formed complex involves proton transfer in addition to charge transfer. 
ISSN : 0095-9782 
Journal Name : Journal of Solution Chemistry 
Volume : 39 
Issue Number : 9 
Publishing Year : 1431 AH
2010 AD 
Article Type : Article 
Added Date : Monday, October 17, 2011 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
خيرية محمد الأحمريAl-Ahmary, Khairia MResearcherDoctoratekalahmary@kau.edu.sa
مصطفى محمود حبيبHabeeb, Moustafa MResearcherDoctoratemostafah2002@yahoo.com
إيمان عطية السلميAl-Solmy, Eman AResearcherDoctorateeman-alsolmy@hotmail.com

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