The electric birefringences and conformations of some phenylsilanes

1980 ◽  
Vol 33 (11) ◽  
pp. 2343 ◽  
Author(s):  
RS Armstrong ◽  
MJ Aroney ◽  
BS Higgs ◽  
KR Skamp
Keyword(s):  
Carbon Tetrachloride ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Electric Dipole Moments ◽  
Solution State ◽  
Kerr Constants

Electric dipole moments and molar Kerr constants are reported for Ph3SiH, Ph3SiCl, (Ph3Si)2O, Ph2SiH2, Ph2SiMe2 and Ph2SiCl2 as solutes in carbon tetrachloride or cyclohexane solution at 298 K. The data are analysed in terms of the preferred solution-state conformations.

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.

The conformations as solutes of meso-2,2,2',2'-Tetrachlorobicyclopropyl, meso-2,2,2',2'-Tetrabromobicyclopropyl, meso-1,2:3,4-Diepoxybutane and 1,1-Dichloro-2-vinylcyclopropane

1974 ◽  
Vol 27 (7) ◽  
pp. 1563 ◽  
Author(s):  
MJ Aroney ◽  
KE Calderbank ◽  
HJ Stootman
Keyword(s):  
Experimental Data ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Electric Dipole Moments ◽  
Solution State ◽  
Kerr Constants

Electric dipole moments and molar Kerr constants are reported for meso-2,2,2',2'-tetrachlorobicyclopropyl(0.78 D, -4.5 x 10-12), meso-2,2,2r,2'-tetrabromobicyclopropyl (0.54 D, 12.3 x 10-12), meso-l,2:3,4-diepoxybutane (2.83 D,-56.1 x 10-12) and 1,l-dichloro-2-vinylcyclopropane (1.96 D, 6.4 x 10-12)examined as solutes in cyclohexane. The experimental data are analysed to deduce the preferred solution-state conformations.

Electric dipole moments and molar Kerr constants of Phenyl- and Diphenylpyridylmethanes

1973 ◽  
Vol 26 (10) ◽  
pp. 2077 ◽  
Author(s):  
KK Chiu ◽  
HH Huang
Keyword(s):  
Dipole Moment ◽  
Carbon Tetrachloride ◽  
Weak Interaction ◽  
Electric Dipole ◽  
Benzene Solution ◽  
Dipole Moments ◽  
Electric Dipole Moments ◽  
Total Polarization ◽  
The Difference ◽  
Kerr Constants

The difference in total polarization (ΔP) or dipole moment (ΔP) of 2- benzyl-pyridine, 4-benzylpyridine, diphenyl-2-pyridylmethane, diphenyl- 3-pyridylmethane, or diphenyl-4-pyridylmethane in carbon tetrachloride relative to benzene solution provides evidence of weak interaction between these amines and the former solvent. The molar Kerr constants of the amines in the two solvents for 4-benzylpyridine and diphenyl-4- pyridylmethane are analysed to yield the preferred angles of orientation of the phenyl and 4-pyridyl rings in these two molecules.

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.

Molar Kerr constants and solute polarizability anisotropies of ammonia, trimethylamine, trimethylamine oxide and 1,4-Diazabicyclo[2,2,2]octane

1977 ◽  
Vol 30 (7) ◽  
pp. 1411 ◽  
Author(s):  
RS Armstrong ◽  
MJ Aroney ◽  
KE Calderbank ◽  
RK Pierens
Keyword(s):  
Dipole Moment ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Polar Solvents ◽  
Effective Polarizability ◽  
Electric Dipole Moments ◽  
Trimethylamine Oxide ◽  
Solute Interactions ◽  
Kerr Constants

Electric dipole moments and molar Kerr constants are reported for ammonia, trimethylamine, trimethylamine oxide, 1,4- diazabicyclo[2,2,2]octane and its monohydrate in non-polar solvents. The dipole moment now found for 1,4-diazabicyclo[2,2,2]octane differs substantially from previously recorded values. Effective polarizability anisotropies are derived for each of the anhydrous molecules and for the N-H and N-C bonds. The effect of solute interactions with benzene is explored.

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.

THE CONFORMATIONS OF THE DIASTEREOMERIC 2,5-DIMETHYL-2,5-DIMETHOXY-3,4-DIPHENYLHEXANES

1959 ◽  
Vol 37 (7) ◽  
pp. 1132-1145 ◽  
Author(s):  
Henry Sawatzky ◽  
George K. White ◽  
George F Wright
Keyword(s):  
Carbon Tetrachloride ◽  
Experimental Determination ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Free Rotation ◽  
Electric Dipole Moments ◽  
Meso Form ◽  
The Moment ◽  
Increasing Temperature

The electric dipole moments of six possible rotamers comprising the two diastereomeric forms of 2,5-dimethyl-2,5-dimethoxy-3,4-diphenylhexane have been calculated vectorially. Comparison of these values with the experimental determination of polarization in benzene and carbon tetrachloride shows that only two of the rotamers of the dd,ll form and only one of the meso form are present in significant amount. The moment of the dd,ll diastereomer decreases with increasing temperature but that of the meso form is almost invariant. It is probable that all six central linkages in these diastereomers are hindered from free rotation.

The conformations as solutes of 2-Halogenomethyl- and 2-Cyanomethyl-oxirans

1978 ◽  
Vol 31 (10) ◽  
pp. 2303 ◽  
Author(s):  
MJ Aroney ◽  
KE Calderbank ◽  
HJ Stootman
Keyword(s):  
Electric Dipole ◽  
Dipole Moments ◽  
Electric Dipole Moments ◽  
Staggered Arrangement ◽  
Relative Abundances ◽  
Kerr Constants

Electric dipole moments and molar Kerr constants are reported for the substituted oxirans (A; X = H, F, Cl, Br, I or CN). The data are analysed to obtain information on the relative abundances of conformational forms, each of which has a staggered arrangement of the CH2X and oxiran groups.

Sign in / Sign up

Export Citation Format

Share Document