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Title: High frequency and static relaxation parameters of some polar monosubstituted anilines in benzene
Authors: Basak, R C
Kannakar, A
Sit, S K
Acharyya, S
Issue Date: Mar-1999
Publisher: NISCAIR-CSIR, India
Abstract: The use of slopes of individual variation of the imaginary σ"ij and real σ́ij parts of high frequency (hf) conductivity σ*ij with the weight fractions WJ’s of a solute is employed to determine relaxation times) τj’s of some monosubstituted anilines in C6H6. The dipole moments μj 's of such polar molecules in terms of estimated) τj’s are calculated and compared with those by using the existing methods for τj (Murthy et al. 1989) . Excellent agreement of τJ’s in all cases except m-toluidine indicates the applicability of both the methods. The hf μj as well as static μs differ from μtheo's as obtained from the available bond angles and bond moments. The reduced bond moments are, however, calculated from the estimated μj , μs and μtheo to yield the exact μ's in close agreement with μs and μj  only to establish the presence of inductive and mesomeric moments of the substituent groups, in addition to solute-solute or solute-solvent molecular associations among the molecules in the solution . The μj's being little affected by the frequency of the electric field, are finally compared with μ2 and μ1 (Sit and Acharyya, 1996) due to rotations of the whole and a part of the molecules. They are very close to μ1 indicating the fact that a part of the molecule is rotating under the electric field of 10 GHz.
Page(s): 224-233
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.37(03) [March 1999]

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