[Home ] [Archive]   [ فارسی ]  
:: Volume 18, Issue 58 (No.3&4-صفحات انگلیسی از 13 تا 73 2004) ::
Materials & Energy 2004, 18(58): 56-66 Back to browse issues page
Spectrophotometric Study of Charge-Transfer Complexes of DDQ with Some Benzophenones in Chloroform Solution
Abstract:   (2740 Views)
A spectrophotometric study concering the charge transfer interaction between 2,3-dichloro-5,6-dicyano-1,4-benzoquione (DDQ) and some benzophenoes has been carried out in chloroform at 25°C. Comparision of the spectra of the complexes of 1.2-dimethoxybenzene-DDQ and benzophenone-DDQ is indicative of two kinds of transitions: (i) n→π*, and (ii) π→π* respectively,). Formation constants of the resulting 1:1 molecular complexes were determined by using the Hildebrand method. The values of formation constants are in parallel with the charge density on the oxygen atoms of cabonyl groups. Also steric hindrance of substituents affects the stability of the resulting complexes. The shifts in stretching frequency of carbonyl groups of benzophenones, brought about upon complexation, further supports that donation takes place from oxygens of the carbonyl groups.
Keywords: DDQ, Benzophenones, Charge-transfer complex, spectrophotometry
     
Add your comments about this article
Your username or Email:

CAPTCHA code


XML   Persian Abstract   Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Spectrophotometric Study of Charge-Transfer Complexes of DDQ with Some Benzophenones in Chloroform Solution. Materials & Energy. 2004; 18 (58) :56-66
URL: http://jsci.khu.ac.ir/article-1-1138-en.html


Volume 18, Issue 58 (No.3&4-صفحات انگلیسی از 13 تا 73 2004) Back to browse issues page
نشریه علوم دانشگاه خوارزمی Quarterly Journal of Science  Kharazmi University