A semiempirical SCF-CI study of steric effects in aza derivatives of biphenyl in relation to their electronic spectra

1969 ◽  
Vol 3 (6) ◽  
pp. 516-519 ◽  
Author(s):  
B. Tinland
Keyword(s):  
Electronic Spectra ◽  
Steric Effects ◽  
Derivatives Of

Conformational analysis and steric effects of substituents in derivatives of 3-oxo-, 3-imino-, and 3-methylenecyclohexene

1997 ◽  
Vol 46 (11) ◽  
pp. 1891-1896
Author(s):  
O. V. Shishkin ◽  
E. V. Solomovich ◽  
M. Yu. Antipin ◽  
A. S. Petrenko ◽  
L. A. Kutulya
Keyword(s):  
Conformational Analysis ◽  
Steric Effects ◽  
Derivatives Of

Nuclear magnetic resonance characterization of the ring conformations of monosubstituted derivatives of 1,3-dioxa-5,6-benzocycloheptene

1983 ◽  
Vol 61 (1) ◽  
pp. 109-115 ◽  
Author(s):  
R. St-Amour ◽  
M. St-Jacques
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Substituent Effects ◽  
Steric Effects ◽  
Slow Exchange ◽  
Conformational Properties ◽  
Derivatives Of ◽  
Ring Conformations ◽  
Twist Boat

The conformational properties of 2-alkyl (Me, Et, i-Pr, and t-Bu) and 2-phenyl derivatives of 1,3-dioxa-5,6-benzocycloheptene (1) were studied by 13C dnmr. Analysis of slow exchange spectra at 100.6 MHz indicates that all derivatives except tert-butyl exist in an equilibrium of chair (major) and twist-boat (minor) conformations. Substituent effects on the position of the equilibrium are rationalized in terms of steric effects.

Steric Effects in the Electronic Spectra of the 3,5-Diarylaminobenzene Derivatives

1986 ◽  
Vol 41 (11) ◽  
pp. 1311-1314 ◽  
Author(s):  
A. Balter ◽  
W. Nowak ◽  
P. Milart ◽  
J. Sepioł
Keyword(s):  
Excited State ◽  
Electronic Spectra ◽  
Fluorescence Properties ◽  
Steric Effects ◽  
Quantum Yields ◽  
Spectroscopic Behaviour ◽  
Fluorescence Quantum Yields ◽  
Excited State Lifetimes ◽  
Methyl Phenyl

Absorption and fluorescence properties, excited state lifetimes and fluorescence quantum yields were determined for a series of 3,5-diarylaminobenzene derivatives in solvents of different polarities. The role of the nitrile, methyl, phenyl and naphthyl substituents is discussed. Especially the steric effects on the spectroscopic behaviour of the investigated molecules are studied.

Electronic spectra and structure of aromatic derivatives of the group IVB and group VB elements

1976 ◽  
Vol 25 (2) ◽  
pp. 319-322
Author(s):  
K. L. Rogozhin ◽  
A. N. Rodionov ◽  
S. G. Smirnov ◽  
D. N. Shigorin ◽  
O. P. Syutkina ◽  
...  
Keyword(s):  
Electronic Spectra ◽  
Derivatives Of

Electronic spectra and structure of aromatic derivatives of lithium, boron, aluminum, and gallium

1975 ◽  
Vol 24 (9) ◽  
pp. 1874-1878 ◽  
Author(s):  
K. L. Rogozhin ◽  
A. N. Rodionov ◽  
D. N. Shigorin ◽  
N. I. Sheverdina ◽  
K. A. Kocheshkov
Keyword(s):  
Electronic Spectra ◽  
Derivatives Of
Sign in / Sign up

Export Citation Format

Share Document