The empirical calculation of true dipole moments from the apparent values shown by solutes in carbon tetrachloride

1954 ◽  
Vol 7 (1) ◽  
pp. 33 ◽  
Author(s):  
CG Le Fevre ◽  
RJW Le Fevre
Keyword(s):  
Carbon Tetrachloride ◽  
Infinite Dilution ◽  
Dipole Moments

New measurements are recorded of the polarizations at infinite dilution in carbon tetrachloride of 13 solutes. The apparent dipole moments computed therefrom, together with those determined earlier of acetone, chloroform, and paraldehyde, are used to calculate true ?gas? moments via an equation, due to Buckingham and Le F�vre, hitherto tested only when benzene has been the solvent. Results with carbon tetrachloride are as satisfactory as those with benzene.

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.

Effects of p-substituents on the conformation of acetophenone

1981 ◽  
Vol 34 (7) ◽  
pp. 1443 ◽  
Author(s):  
D Mirarchi ◽  
GLD Ritchie
Keyword(s):  
Carbon Tetrachloride ◽  
Dihedral Angle ◽  
Infinite Dilution ◽  
Dipole Moments ◽  
Reported Data ◽  
Kerr Constants

Experimental dipole moments and infinite-dilution molar Kerr constants are reported for six p-substituted acetophenones (CH3COC6H4X; X = Me, But, NO2, CN, F, Br) as solutes in carbon tetrachloride at 298 K. Analysis of these results and reconsideration of previously reported data for acetophenone and p-chloroacetophenone yields the dihedral angle, Φ, between the planes of the carbonyl and aryl groups in the effective conformation of each molecule (X = H, Φ = 0°; Me, 0°; But, 10�10°; NO2, 20�15°; NO2, 20�20°; F, 27�5°; Cl, 32�5°; Br, 30�10°).

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.

The molar kerr constants, dipole moments, and relaxation times of Methyl and Ethyl Maleates and fumarates, Ethyl Formate, Diethyl Oxalate, and of Ethyl and Propyl Azodiformates

1957 ◽  
Vol 10 (3) ◽  
pp. 218 ◽  
Author(s):  
CG Le Fevre ◽  
RJW Le Fevre ◽  
WT Oh
Keyword(s):  
Carbon Tetrachloride ◽  
Infinite Dilution ◽  
Dipole Moments ◽  
Azimuthal Angle ◽  
Relaxation Times ◽  
Ethyl Formate ◽  
The Other ◽  
Diethyl Oxalate ◽  
Negative Results ◽  
Kerr Constants

Values for the properties and compounds named in the title are recorded at infinite dilution in carbon tetrachloride at 25 �C. Dipole moments of the seven diesters lie between 2 2 and 2.8 D ; the molar Kerr constants of the two azodiformates however differ from those of the maleates, fumarates, and oxalate in being negative. Results with ethyl oxalate are consistent with a structure in which the two ?CO2Et groups are in planes making an azimuthal angle c. 90�. Indications of configurations for the other esters are discussed, but conclusions are indefinite.

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.

Complexation of Tertiary Amides by Phenols in Carbon Tetrachloride Solutions

1978 ◽  
Vol 33 (2) ◽  
pp. 230-236 ◽  
Author(s):  
Edmund Kwiatkowski ◽  
Krystyna Kozubek ◽  
Zbigniew Pepliǹski
Keyword(s):  
Carbon Tetrachloride ◽  
Dipole Moments ◽  
Formation Constants ◽  
Tertiary Amides

Formation constants for 1 : 1 complexes of N,N-dialkylamides and N-acetylmorpholine with chloro-and nitrophenols have been determined spectrophotometrically in carbon tetrachloride solutions at 20 °C. Enthalpies of reaction for 14 systems have been obtained calorimetrically. Dipole moments of N,N-di(n-butyl)acetamide, N,N-di(isobutyl)acetamide and N-acetylmorpholine have been determined

The solution dipole moments and the atomic polarizations of chloro-, bromo-, and iodo-benzenes

1968 ◽  
Vol 21 (7) ◽  
pp. 1721 ◽  
Author(s):  
HH Huang ◽  
VR Sullivan
Keyword(s):  
Dielectric Constant ◽  
Carbon Tetrachloride ◽  
Dipole Moments ◽  
Quantitative Information ◽  
Atomic Polarization ◽  
Density Measurements ◽  
Polar Solutes

Dielectric constant and density measurements of solutions of chloro-, bromo-, and iodo-benzene together with those of p-dichloro-, p-dibromo- and p-diiodo-benzene in carbon tetrachloride at 25� are given. Distortion and atomic polarization values for the polar solutes are estimated by a method proposed by B�ttcher; the values are compared with other estimates of PD and PA. To obtain quantitative information of atomic polarizations, using B�ttcher's method, greater precision than is usual in solution dielectric constant measurements would be required.

scholarly journals Dipole moments and molecular structure. Part II.—The trichlorides of the elements of group V

1932 ◽  
Vol 136 (829) ◽  
pp. 256-263 ◽  
Keyword(s):  
Molecular Structure ◽  
Carbon Tetrachloride ◽  
Dipole Moments ◽  
Inorganic Compounds ◽  
Antimony Trichloride ◽  
Molecular Structures ◽  
Polar Solvents ◽  
Group V ◽  
Gaseous State ◽  
Analogous Data

Although numerous investigators have carried out measurements of the dipole moments of the commoner organic compounds, few references are to be found to analogous data for inorganic compounds. The latter are confined almost exclusively to those substances which can be investigated in the gaseous state. The present series of investigations were commenced, therefore, with a view to applying the method of dilute solutions to the measurement of the dipole moments of such inorganic compounds as are soluble in non-polar solvents, and to relating the dipole moments of analogous groups of compounds to their molecular structures. The first series of measurements to be made, and those described in this paper, were upon the trichlorides of phosphorus, arsenic and antimony. Of these, measurements had been recorded only with respect to antimony trichloride when this investigation was carried out. More recently, measurements of the dipolar moments of all three compounds have been recorded by Bergmann and Engel. but their experimental results show much greater discrepancies among one another than do those of the author. Werner used both benzene and ethyl ether as solvents for the antimony trichloride, finding a considerable difference between the values obtained in the two cases. Bergmann and Engel used carbon tetrachloride as solvent for the phosphorus and arsenic trichlorides and benzene for the antimony trichloride. In the present investigation, benzene has been used as the solvent for all three compounds.

THE NUCLEAR MAGNETIC RESONANCE SPECTRA OF PARA-SUBSTITUTED PHENOLS

1962 ◽  
Vol 40 (11) ◽  
pp. 2122-2125 ◽  
Author(s):  
W. G. Paterson ◽  
N. R. Tipman
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Carbon Tetrachloride ◽  
Magnetic Resonance ◽  
Infinite Dilution ◽  
Chemical Shifts ◽  
Substituted Phenols ◽  
Linear Relationships ◽  
Nuclear Magnetic Resonance Spectra ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

The nuclear magnetic resonance spectra of a number of para-substituted phenols have been examined. The —OH chemical shifts, extrapolated to infinite dilution in benzene and in carbon tetrachloride, were found to be almost independent of the nature of the ring substituent. Approximately linear relationships were observed between the internal chemical shift of the ring protons and other physical properties.

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