title: Effects of methyl substituent on the charge-transfer complexations of dicarbazolylalkanes with p-chloranil, tetracyanoethylene and tetracyanoquinodimethane.
abstract: Series of 1,n-dicarbazolylalkanes and 1,n-di(3-methylcarbazolyl)alkanes (where n=1-5) were synthesized and the molar extinction coefficients, equilibrium constants, enthalpies, and entropies of their charge-transfer (CT) complexes with the π-acceptors p-chloranil, tetracyanoethylene, and tetracyanoquinodimethane were investigated. 1,n-Di(3-methylcarbazolyl)alkanes formed CT complexes with higher equilibrium constants, more negative enthalpies and entropies than 1,n-dicarbazolylalkanes. Vibrational spectra of CT complexes of one of the donor molecules (1,4-dicarbazolylbutane) with all three acceptors were compared.
authors.affiliation: Balıkesir University, Department of Chemistry Education, 10100 Balıkesir, Turkey. asker@balikesir.edu.tr
authors.forename: Erol
authors.initials: E
authors.lastname: Asker
authors.forename: Ece
authors.initials: E
authors.lastname: Uzkara
authors.forename: Orhan
authors.initials: O
authors.lastname: Zeybek
mesh_terms: D000473:Alkanes / Q000737:chemistry* / Q000378:metabolism; D002227:Carbazoles / Q000737:chemistry* / Q000378:metabolism; D002703:Chloranil / Q000737:chemistry* / Q000378:metabolism; D004735:Energy Transfer; D005030:Ethylenes / Q000737:chemistry* / Q000378:metabolism; D046911:Macromolecular Substances / Q000737:chemistry / Q000378:metabolism*; D008745:Methylation; D008956:Models, Chemical; D009570:Nitriles / Q000737:chemistry* / Q000378:metabolism; D013816:Thermodynamics
chemical_list: D000473:Alkanes; D002227:Carbazoles; D005030:Ethylenes; D046911:Macromolecular Substances; D009570:Nitriles; D002703:Chloranil; C013703:tetracyanoquinodimethane; C003393:tetracyanoethylene