These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Charge transfer complexes of picolines with sigma- and pi-acceptors.
    Author: Razzaq H, Qureshi R, Janjua NK, Saira F, Saleemi S.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2008 Oct; 70(5):1034-40. PubMed ID: 18078780.
    Abstract:
    In the present study CT complexes of 2-, 3- and 4-Picolines with (DDQ) 2, 3-dichloro-5, 6-dicyano parabenzoquinone (pi-acceptor) and (I2) Iodine (sigma-acceptor) have been investigated spectrophotometrically in three different solvents (CCl4, CHCl3 and CH2Cl2) at six different temperatures. The formation constants of the CT complexes were determined by the Benesi-Hildebrand equation. The thermodynamic parameters were calculated by Van(')t Hoff equation. The DeltaH degrees , DeltaG degrees and DeltaS degrees values are all negative implying that the formation of studied complexes is exothermic in nature.
    [Abstract] [Full Text] [Related] [New Search]