UV spectroscopic studies of charge transfer complexes of 2-hydroxy-1, 4-naphthoquinone. | [Journal of Chemical Society of Pakistan • 2008]

Author(s):

1. Muhammad Sadiq Subhani: Department of Chemistry, Qauid-e-Azam University, Islamabad, Pakistan

2. Sadaf Aslam: Department of Chemistry, Qauid-e-Azam University, Islamabad, Pakistan

3. Rumana Qureshi: Department of Chemistry, Qauid-e-Azam University, Islamabad, Pakistan

4. Abdur-Rahman: Department of Chemistry, Qauid-e-Azam University, Islamabad, Pakistan

Abstract:

Charge transfer complexes of 2-hydroxy-l,4-naphthoquinone with 2,3 and 4-picoline, 4-picolylamine, 2-aminopyrimidine and 2-aminopyridine were studied and their absorption spectra were recorded. In each case one charge transfer (CT) band was observed. These investigations were made in three different solvents (CCl4, CH2Cl2 and CHCl3) at four different temperatures (20, 25, 30 and 35 oC). The values of association constant (KAD), molar extinction coefficient (εAD) and absorption band of charge transfer complexes (hocr) were calculated. The ionization potentials of the donors (ID) were calculated from the complex band energy. Thermodynamic parameters i.e. changes in standard free energy (?Go), standard entropy (?Ho)and standard enthalpy (?So) for all these CT complexes were also calculated.

Page(s): 232-236

DOI: DOI not available

Published: Journal: Journal of Chemical Society of Pakistan, Volume: 30, Issue: 2, Year: 2008

Keywords:

Keywords are not available for this article.

References:

References are not available for this document.

Citations

Citations are not available for this document.

Citations

Downloads

Views