Dipole moment, Kerr constant, Cotton-Mouton constant and conformation of 1,4-dithiin

1982 ◽  
Vol 35 (11) ◽  
pp. 2335 ◽  
Author(s):  
D Mirarchi ◽  
L Phillips ◽  
GLD Ritchie
Keyword(s):  
Dipole Moment ◽  
Carbon Tetrachloride ◽  
Magnetic Anisotropy ◽  
Infinite Dilution ◽  
Kerr Constant ◽  
Polarizability Anisotropy ◽  
Solution State

Measurements of the infinite-dilution dipole moment, molar Kerr constant and molar Cotton-Mouton constant of 1,4-dithiin dissolved in cyclohexane and carbon tetrachloride at 25�C are reported and analysed to provide information concerning the solution-state conformation, the polarizability anisotropy and the magnetic anisotropy of this molecule.

Molecular quadrupole moment and magnetic anisotropy of carbon diselenide

1981 ◽  
Vol 34 (11) ◽  
pp. 2253 ◽  
Author(s):  
MP Brereton ◽  
MK Cooper ◽  
GR Dennis ◽  
GLD Ritchie
Keyword(s):  
Magnetic Properties ◽  
Carbon Tetrachloride ◽  
Magnetic Anisotropy ◽  
Field Gradient ◽  
Quadrupole Moment ◽  
Infinite Dilution ◽  
Kerr Constant ◽  
Constant Field ◽  
Triatomic Molecules

Measurements of the infinite-dilution molar Kerr constant, field-gradient birefringence constant and Cotton-Mouton constant of carbon diselenide as a solute in carbon tetrachloride at 298 K are reported. From an analysis of the observations, the molecular quadrupole moment, Θ, and the magnetic anisotropy, ΔX, emerge as (+15.4 � 2.7) × 10-40 Cm2 and (-19.6 � 2.6) × 10-5 J T-2 mol-1, respectively. Trends in these and related electric and magnetic properties are considered for the sequence of six linear triatomic molecules of formula XCY (X,Y = O,S,Se).

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.

Cotton-Mouton and Kerr constants of twelve non-dipolar tri- and hexa-substituted benzenes

1982 ◽  
Vol 35 (5) ◽  
pp. 869 ◽  
Author(s):  
GLD Ritchie ◽  
J Vrbancich
Keyword(s):  
Carbon Tetrachloride ◽  
High Frequency ◽  
Infinite Dilution ◽  
Experimental Results ◽  
Lower Sensitivity ◽  
Polarizability Anisotropy ◽  
Substituted Benzenes ◽  
Significant Temperature ◽  
Predicted Values ◽  
Kerr Constants

Measurements of the infinite-dilution molar Cotton-Mouton and Kerr constants of 12 non-dipolar 1,3,5-tri- and hexa-substituted benzenes as solutes in carbon tetrachloride at 298 K are reported. Some of the experimental results are in notable disagreement with earlier determinations made on equipment of much lower sensitivity. Although the magnetic anisotropies derived for the tri-substituted benzenes are concordant with other observed or predicted values, those for the hexa-substituted benzenes are generally very much larger than expected. It is suggested, in explanation, that relatively large and strongly anisotropic atomic polarizabilities may cause the ratio of the static to the high-frequency polarizability anisotropy to be considerably smaller in the hexa-substituted benzenes than in benzene; in addition, there may be significant temperature independent contributions to the magnetic birefringences of these molecules.

Conformation of 1,3-dichloroacetone

1972 ◽  
Vol 25 (12) ◽  
pp. 2615 ◽  
Author(s):  
HH Huang ◽  
ELK Tan
Keyword(s):  
Dipole Moment ◽  
Carbon Tetrachloride ◽  
Equilibrium Mixture ◽  
Kerr Constant

The molar Kerr constant (35 x 10-12) and dipole moment (2.29 D) of 1,3-dichloroacetone in carbon tetrachloride are shown to be compatible with an equilibrium mixture of planar cis/non-planar gauche (6) and non-planar gauche/non-planar gauche (8) conformers with the latter predominating.

Internal rotation in 1,2-dichloroethane

1964 ◽  
Vol 17 (10) ◽  
pp. 1098 ◽  
Author(s):  
FFvre RJW Le ◽  
BJ Orr
Keyword(s):  
Dipole Moment ◽  
Carbon Tetrachloride ◽  
Potential Energy ◽  
Internal Rotation ◽  
Trans Isomer ◽  
Kerr Constant ◽  
Energy Barriers ◽  
Intramolecular Rotation

The magnitudes of dipole moment and molar Kerr constant of 1,2-dichloroethane as solute in carbon tetrachloride, previously recorded by Aroney, Izsak, and Le F�vre, are discussed in relation to internal rotation in the molecule. The results are found to be consistent with a mixture consisting of 31.3% of gauche-isomer and 68.7 % of trans-isomer. Estimation of the potential energy barriers restricting intramolecular rotation is attempted and the results found to be satisfactory.

Dipole moments, Kerr constants and solution-state conformations of 1- and 2-pivaloylnaphthalene

1982 ◽  
Vol 35 (11) ◽  
pp. 2341 ◽  
Author(s):  
D Mirarchi ◽  
GLD Ritchie
Keyword(s):  
Carbon Tetrachloride ◽  
Infinite Dilution ◽  
Dipole Moments ◽  
Dihedral Angles ◽  
Solution State ◽  
Kerr Constants

Infinite-dilution dipole moments (1030p/Cm) and molar Kerr constants (1027mK/m5 V-2 mol-1) for 1-pivaloylnaphthalene (8.83,-490) and 2-pivaloylnaphthalene (9.24, 218) as solutes in carbon tetrachloride at 25�C are reported and analysed to yield the dihedral angles between the Car-CO-C and naphthyl planes as 90 � 10� and 53 � 8�, respectively.

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.

Self-Association of Cholesterol in Carbon Tetrachloride

1979 ◽  
Vol 34 (3) ◽  
pp. 369-374 ◽  
Author(s):  
M. Kunst ◽  
D. van Duijn ◽  
P. Bordewijk
Keyword(s):  
Dipole Moment ◽  
Carbon Tetrachloride ◽  
Concentration Dependence ◽  
Equilibrium Constants ◽  
Molar Fraction ◽  
Dilute Solutions ◽  
Dielectric Parameters ◽  
Moment Equilibrium ◽  
Self Association

Abstract Analysis of infrared hydroxyl multimer absorbances of dilute solutions of cholesterol in carbon tetrachloride as a function of the monomer absorbance strongly favours the interpretation of the association of this alcohol with a monomer-dimer-tetramer model up to a molar fraction of 0.012. This model also explains very well the concentration dependence of the apparent dipole moment. Equilibrium constants and dielectric parameters have been determined. Suggestions about the structure of the various associates are made.

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