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Title: Molecular complexes of anilines with DDQ
Authors: Kumar, T Vinod
Singh, T Charan
Venkateshwarlu, G
Issue Date: Jun-2001
Publisher: NISCAIR-CSIR, India
Abstract: Molecular complexes of DDQ with anilines have been studied spectrophotometrically by stabilising the complexes in a low polar solvent (CCl4), at low temperatures and under low donor concentrations. All the complexes exhibit well resolved charge transfer bands in the visible region where neither of the components has any absorption. The stoichiometry of each of the complex is found to be 1:1 and is unaffected by the variation of temperature. A linear relationship is observed between the vCT of DDQ- anilines and the vCT of TCNE-anilines indicating a π-π interaction between the DDQ and the donors. The stabilities and thermodynamic parameters have been determined from the absorption studies on the CT bands. A linear relationship has been observed between logarithmic functions of stability constants and Hammett σ constants. Both ring and N-substituents affect the position of CT band and 0 the stabilities of the complexes.
Page(s): 622-625
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.40A(06) [June 2001]

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