Intramolecular interactions. XXV. Internal rotation barriers of benzylic compounds. Molecular optical anisotropies, dipole moments, and Kerr constants

1975 ◽  
Vol 79 (18) ◽  
pp. 1966-1969 ◽  
Author(s):  
Michel Camail ◽  
Alain Proutiere ◽  
Hubert Bodot
Keyword(s):  
Internal Rotation ◽  
Dipole Moments ◽  
Intramolecular Interactions ◽  
Kerr Constants

Dipole moments and Kerr constants of dibenzoates of some diols with different numbers of methylene units as model compounds for polyesters

1990 ◽  
Vol 23 (4) ◽  
pp. 1139-1144 ◽  
Author(s):  
Francisco Mendicuti ◽  
Maria M. Rodrigo ◽  
Maria P. Tarazona ◽  
Enrique Saiz
Keyword(s):  
Dipole Moments ◽  
Model Compounds ◽  
Kerr Constants

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.

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