scholarly journals Apparent Dipole Moments and Dielectric Relaxation Times of 1,4-Benzoquinone and Its Derivatives in Solutions

1974 ◽  
Vol 47 (12) ◽  
pp. 3010-3013 ◽  
Author(s):  
Tohru Nagai ◽  
Hiroaki Takahashi ◽  
Keniti Higasi ◽  
Leslie E. Sutton ◽  
David Waddington
Keyword(s):  
Dielectric Relaxation ◽  
Dipole Moments ◽  
Relaxation Times

Dielectric loss measurements for Bis(pentane-2,4-dionato)oxovanadium(IV) in benzene and dioxan

1975 ◽  
Vol 28 (5) ◽  
pp. 1137 ◽  
Author(s):  
MJ Aroney ◽  
RL Angel
Keyword(s):  
Dielectric Loss ◽  
Complex Formation ◽  
Dielectric Relaxation ◽  
Dipole Moments ◽  
Relaxation Times

Dipole moments and dielectric relaxation times determined by dielectric loss measurements are reported for bis(pentane-2,4- dionato)oxovanadium(IV) as a solute in benzene and in dioxan. Evidence is presented for VO(acac)2,dioxan complex formation.

ChemInform Abstract: APPARENT DIPOLE MOMENTS AND DIELECTRIC RELAXATION TIMES OF 1,4-BENZOQUINONE AND ITS DERIVATIVES IN SOLUTIONS

1975 ◽  
Vol 6 (8) ◽  
pp. no-no
Author(s):  
TOHRU NAGAI ◽  
HIROAKI TAKAHASHI ◽  
KENITI HIGASI ◽  
LESLIE E. SUTTON ◽  
DAVID WADDINGTON
Keyword(s):  
Dielectric Relaxation ◽  
Dipole Moments ◽  
Relaxation Times

scholarly journals Dielectric Relaxation of Mixtures of N-Methylacetamide and N,N-Dimethylformamide Solved in Benzene Using Microwave Absorption Data

2006 ◽  
Vol 61 (3-4) ◽  
pp. 197-204
Author(s):  
Raman Kumar ◽  
V. S. Rangra ◽  
D. R. Sharma ◽  
N. Thakur ◽  
N. S. Negi
Keyword(s):  
Dielectric Relaxation ◽  
Viscous Flow ◽  
Relaxation Process ◽  
Dipole Moments ◽  
Relaxation Times ◽  
Single Frequency ◽  
Absorption Data ◽  
Dielectric Relaxation Process ◽  
Energy Parameters ◽  
Microwave Techniques

The dielectric relaxation times τ and dipole moments μ of N-methylacetamide (NMA) mixed with N,N-dimethylformamide (DMF) in benzene solutions have been obtained using standard standing wave microwave techniques and Gopala Krishna’s single frequency (9.90 GHz) concentration variational method at 25, 30, 35, and 40 ◦C. The energy parameters (ΔHε , ΔFε , ΔSε ) for the dielectric relaxation process of mixtures with equal amounts of NMA and DMF have been calculated and compared with the corresponding energy parameters (ΔHη , ΔFη , ΔSη ) for the viscous flow. On the basis of the observations it is found that the dielectric relaxation process can be treated as a rate process like the viscous flow. Solute-solute and solute-solvent types of the molecular associations have been predicted

Dielectric Relaxation of Bromoalkanes in Cyclohexane Solution

1972 ◽  
Vol 50 (13) ◽  
pp. 2031-2034 ◽  
Author(s):  
Sing Pin Tay ◽  
John Crossley
Keyword(s):  
Dielectric Constant ◽  
Dielectric Relaxation ◽  
Dipole Moments ◽  
Relaxation Times ◽  
Dielectric Constant And Loss ◽  
Distribution Parameters

Mean relaxation times, Cole–Cole distribution parameters and apparent dipole moments, obtained from dielectric constant and loss measurements at 2 MHz and 1.5, 2.0, 2.5, 9.3, 16, 24, 35, 70, and 145 GHz, are reported for 1-, 2-, and 4-bromooctane, 1-bromodecane, 1-bromododecane, 1-bromohexadecane, 1-bromooctadecane, and 1,10-dibromodecane in cyclohexane solution at 25 °C.

Dielectric Relaxation Studies of Mixtures of N-Methylacetamide and Ethanol in Benzene Solutions Using Microwave Absorption Technique

2007 ◽  
Vol 62 (3-4) ◽  
pp. 213-217 ◽  
Author(s):  
Raman Kumar ◽  
Vir Singh Rangra ◽  
Dhani Ram Sharma ◽  
Nagesh Thakur ◽  
Nainjeet Singh Negi
Keyword(s):  
Dielectric Relaxation ◽  
Relaxation Process ◽  
Binary Mixtures ◽  
Benzene Solution ◽  
Dipole Moments ◽  
Relaxation Times ◽  
Activation Parameters ◽  
Single Frequency ◽  
Dielectric Relaxation Process ◽  
Free Energy Of Activation

Using standard standing wave microwave X-band techniques, and by following Gopala Krishna’s single frequency (9.90 GHz) concentration variational method, the dielectric relaxation times (τ) and dipole moments (μ) of binary mixtures of different molar concentrations of ethanol (EtOH) in binary mixtures of N-methylacetamide (NMA) and ethanol in benzene solutions at 25, 30, 35 and 40 ◦C have been calculated. The activation parameters (ΔHε , ΔFε , ΔSε ) for the dielectric relaxation process of binary mixtures containing 30 mol% of EtOH have been calculated at 25, 30, 35 and 40 ◦C and compared with the corresponding viscosity parameters. A good agreement between the free energy of activation from these two sets of values shows that the dielectric relaxation process, like the viscous flow, can be treated as a rate process. From relaxation time behaviour of NMA and EtOH binary mixtures in benzene solution, solute-solute and solute-solvent types of the molecular association have been predicted.

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