scholarly journals Kerr constant-dispersion measurements on cyclohexane

1972 ◽  
Vol 25 (2) ◽  
pp. 413 ◽  
Author(s):  
FFvre RJW Le ◽  
RK Pierens
Keyword(s):  
Carbon Tetrachloride ◽  
Wavelength Range ◽  
Kerr Constant ◽  
Inert Medium ◽  
Chemical Changes ◽  
Kerr Constants ◽  
Hydrogen Bondings ◽  
Basic Substances

Le Fbre and Solomons recorded the Kerr constants Bγ of carbon tetrachloride and benzene over the wavelength range 375-625 nm to make possible the use of these solvents in examining the anisotropic polarizabilities of coloured solutes. Since, however, unsuspected hydrogen bondings may occur between π-electrons of benzene and protons from a dissolved molecule, and/or because of the various risks of chemical changes when basic substances are studied in carbon tetrachloride, an additional and more inert medium became desirable. Cyclohexane seemed to be the least reactive of the liquids which are available in quantity and easily purified, but no information on the variation of its B constant with wavelength was in the literature; the present measurements were therefore made to fill this gap.

Kerr constant-dispersion measurements on benzene and carbon tetrachloride

1968 ◽  
Vol 21 (7) ◽  
pp. 1703 ◽  
Author(s):  
RJW Le Fevre ◽  
SC Solomons
Keyword(s):  
Carbon Tetrachloride ◽  
Kerr Constant ◽  
Empirical Equations ◽  
Kerr Constants

The electric birefringences displayed by the above two liquids have been measured photometrically at wavelengths between 375 and 625 mμ, and Kerr constants Bλ computed relatively to benzene, for which B589 is 0.410 x 10-7 at 25�. Empirical equations connecting Bλ values and refractive indexes with X are developed, and compared in applicability with others from the literature. Data necessary for the determination of molar Kerr constants of coloured solutes in the named solvents are also recorded.

Dipole moments, Kerr constants and solution-state conformations of di(pyridin-4-yl), di(pyridin-3-yl) and di(pyridin-2-yl) ketone

1980 ◽  
Vol 33 (12) ◽  
pp. 2597 ◽  
Author(s):  
PH Gore ◽  
IG John ◽  
RK Pierens ◽  
GLD Ritchie
Keyword(s):  
Carbon Tetrachloride ◽  
Dipole Moments ◽  
Strong Preference ◽  
Trans Conformation ◽  
Solution State ◽  
Kerr Constants

Experimental dipole moments and molar Kerr constants are reported and analysed for di(pyridin-4-yl), di(pyridin-3-yl) and di(pyridin-2-yl) ketone as solutes in carbon tetrachloride or cyclohexane at 298 K. The preferred conformation of di(pyridin-4-yl) ketone is found to be very similar to those previously deduced for benzophenone and several 4,4'- disubstituted benzophenones. For di(pyridin-3-yl) and di(pyridin-2-yl) ketone three analogous conrotatory structures having different relative dispositions of the nitrogen atoms are considered. In the case of di(pyridin-3-yl) ketone the cis-trans and trans-trans arrangements are approximately equally abundant, but for di(pyridin-2-yl) ketone there is a strong preference for the trans-trans conformation.

Molecular polarizability: The molar Kerr constants of diazoaminobenzene and four of its derivatives.

1966 ◽  
Vol 19 (4) ◽  
pp. 709
Author(s):  
RS Armstrong ◽  
RJW Le Fevre ◽  
AN Singh
Keyword(s):  
Infinite Dilution ◽  
Kerr Constant ◽  
Molecular Polarizability ◽  
Constant Concentration ◽  
Nitro Derivatives ◽  
Kerr Constants ◽  
Concentration Curves

The molar Kerr constants of diazoaminobenzene and its 4,4'-dimethyl, 4,4'-clichloro, 4,4'-dibromo, and 4-nitro derivatives at infinite dilution in benzene at 25� are recorded. No abnormalities in the molar Kerr constant-concentration curves due to dimeric association can be found with any of the above solutes.

The conformations of some organic carbonates

1981 ◽  
Vol 34 (2) ◽  
pp. 349 ◽  
Author(s):  
LHL Chia ◽  
KJ Kwan ◽  
HH Huang
Keyword(s):  
Experimental Data ◽  
Carbon Tetrachloride ◽  
Electric Dipole ◽  
Dimethyl Carbonate ◽  
Dipole Moments ◽  
Diphenyl Carbonate ◽  
Diethyl Carbonate ◽  
Electric Dipole Moments ◽  
Organic Carbonates ◽  
Kerr Constants

Electric dipole moments and molar Kerr constants are reported for seven organic carbonates (dimethyl carbonate, diethyl carbonate, vinylene carbonate, diphenyl carbonate, di-p-tolyl carbonate, di-o- tolyl carbonate and t-butyl phenyl carbonate) examined as solutes in carbon tetrachloride at 25�. The experimental data are analysed to provide information on the probable solution-state conformations.

Conformations of vinyl formate and vinyl acetate

1976 ◽  
Vol 29 (3) ◽  
pp. 581 ◽  
Author(s):  
MJ Aroney ◽  
EAW Bruce ◽  
IG John ◽  
L Radom ◽  
GLD Ritchie
Keyword(s):  
Carbon Tetrachloride ◽  
Ab Initio ◽  
Gas Phase ◽  
Vinyl Acetate ◽  
Molecular Orbital ◽  
Dipole Moments ◽  
Molecular Orbital Theory ◽  
Orbital Theory ◽  
Theoretical Predictions ◽  
Kerr Constants

Ab initio molecular orbital theory has been used to deduce the preferred gas-phase conformations of vinyl formate and vinyl acetate. In addition, experimental dipole moments (1030μ/Cm) and molar Kerr constants (1027mK/m5 V-2 mol-1) at 25�C are reported for both molecules as solutes in carbon tetrachloride: vinyl formate (5.07, + 48.1) and vinyl acetate (5.70, + 3.8). The preferred solution-state conformations indicated by the analysis of these results are shown to be consistent with the theoretical predictions.

Dipole Moments, Kerr Constants and Solute Conformations of the Aryl Methyl Sulfones p-XC6H4S(02)CH3 (X = H, Cl, BR or NO2)

1987 ◽  
Vol 40 (3) ◽  
pp. 619 ◽  
Author(s):  
MJ Aroney ◽  
RJW LeFevre ◽  
RK Pierens ◽  
HJ Stootman ◽  
MGM Yong
Keyword(s):  
Experimental Data ◽  
Carbon Tetrachloride ◽  
Infinite Dilution ◽  
Dipole Moments ◽  
Solution State ◽  
Dimethyl Sulfone ◽  
Kerr Constants ◽  
Aryl Methyl

Measurements are reported of the infinite-dilution dipole moments and molar Kerr constants of dimethyl sulfone and of the four aryl methyl sulfones p-XC6H4S(02)CH3 (X = H, Cl, Br or NO2) dissolved in carbon tetrachloride or dioxan at 298 K and under light of 589 nm. The experimental data are analysed to obtain information on the solution-state conformations in relation to steric and electromeric effects operative between the aryl and methanesulfonyl groups.

Kerr constants and conformations of some p-substituted benzaldehydes

1982 ◽  
Vol 35 (3) ◽  
pp. 663
Author(s):  
D Mirarchi ◽  
GLD Ritchie ◽  
AJ Williams
Keyword(s):  
Carbon Tetrachloride ◽  
Infinite Dilution ◽  
Molecular Conformations ◽  
Substituted Benzaldehydes ◽  
Kerr Constants

Analysis of the experimental infinite-dilution molar Kerr constants of five p-substituted benzaldehydes (X-C6H4-CHO; X = NO2, CN, F, Cl, Br) as solutes in carbon tetrachloride at 298 K confirms that uniplanar molecular conformations are preferred.

Conformations of some 4- and 4,4'-Di-substituted benzophenones

1980 ◽  
Vol 33 (10) ◽  
pp. 2181 ◽  
Author(s):  
PH Gore ◽  
IG John ◽  
GLD Ritchie
Keyword(s):  
Carbon Tetrachloride ◽  
Dipole Moments ◽  
Steric Effects ◽  
Minor Role ◽  
Conformational Preferences ◽  
A Minor ◽  
Kerr Constants

Experimental dipole moments and molar Kerr constants are reported for eight 4- and 4,4?-halogeno- and -methyl-benzophenones as solutes in carbon tetrachloride at 298 K. Analysis of the results elucidates the conformational preferences of these molecules and suggests that steric effects are of predominant importance, whereas the additional conjugative interactions provided by the substituents apparently play only a minor role.

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