Ring substituent effects on acetophenone dimethyl acetal formation. 1. Dual-parameter treatment of equilibrium data in methanol, water and dodecane

1983 ◽  
Vol 48 (25) ◽  
pp. 4808-4816 ◽  
Author(s):  
Jean Toullec ◽  
Mohiedine El-Alaoui ◽  
Pascal Kleffert
Keyword(s):  
Substituent Effects ◽  
Dimethyl Acetal ◽  
Ring Substituent ◽  
Equilibrium Data

Substituent effects on the N.M.R. spectra of carboxylic acid derivatives. III. Correlation of 13C N.M.R. spectra of para substituted acetanilides and 4'-nitrophenyl 4-substituted benzoates with infrared carbonyl stretching frequencies, 1H N.M.R., rate and equilibrium data

1984 ◽  
Vol 37 (3) ◽  
pp. 497 ◽  
Author(s):  
CJ O'Conner ◽  
DJ McLennan ◽  
DJ Calvert ◽  
TD Lomax ◽  
AJ Porter ◽  
...  
Keyword(s):  
Free Energy ◽  
Chemical Shifts ◽  
Substituent Effects ◽  
Linear Free Energy Relationships ◽  
Reactive Site ◽  
Linear Free Energy ◽  
Equilibrium Data ◽  
Energy Relationships ◽  
Monosubstituted Benzenes ◽  
Best Fit

The 13C n.m.r. spectra of 17 monosubstituted benzenes, 14 para substituted acetanilides and ten 4'-nitrophenyl 4-substituted benzoates have been measured in (CD3)2SO and the chemical shifts have been compared with the infrared carbonyl stretching frequencies of the substrates (in CCl4), the 1H n.m.r. chemical shifts of protons close to the reactive site of protonation, rates of hydrolysis or aminolysis and literature values of the corresponding basicity constants and rate constants. The observed substituent chemical shifts are non-additive and this result has been discussed in terms of the electronic properties of -NHCOCH3 and -COOC6H4NO2. The 13C n.m.r. and the i.r. data have been treated by single parameter and dual substituent parameter linear free energy relationships and σR values of best fit have been identified. Relative resonance and inductive contributions have been discussed.

An elastic tunnelling study of ring substituent effects in tunnel barriers doped with aromatic aldehydes

1984 ◽  
Vol 141 (1) ◽  
pp. 126-138 ◽  
Author(s):  
J.L. Tomlin ◽  
R.J. Turner ◽  
N.M.D. Brown ◽  
D.G. Walmsley
Keyword(s):  
Substituent Effects ◽  
Aromatic Aldehydes ◽  
Ring Substituent ◽  
Tunnel Barriers

EPR and electrochemical studies of remote ring substituent effects in the coordination of dioxygen to (thio iminato)- and (keto iminato)cobalt(II) pyridine complexes

1983 ◽  
Vol 22 (12) ◽  
pp. 1804-1809 ◽  
Author(s):  
David A. Roberts ◽  
James M. Bush ◽  
Ying Yen Tsao ◽  
Vladimir Katovic ◽  
John J. Fortman ◽  
...  
Keyword(s):  
Substituent Effects ◽  
Electrochemical Studies ◽  
Pyridine Complexes ◽  
Ring Substituent

Ring substituent effects on decylpyridinium bromide micellization

1990 ◽  
Vol 137 (1) ◽  
pp. 92-101 ◽  
Author(s):  
Arthur E Westwell ◽  
Merlyn O Gunsch ◽  
Paul T Jacobs ◽  
Edward W Anacker
Keyword(s):  
Substituent Effects ◽  
Ring Substituent

Substituent effects on rates and equilibriums for benzaldehyde-benzaldehyde dimethyl acetal interconversion

1975 ◽  
Vol 40 (10) ◽  
pp. 1478-1482 ◽  
Author(s):  
T. S. Davis ◽  
P. D. Feil ◽  
D. G. Kubler ◽  
D. J. Wells
Keyword(s):  
Substituent Effects ◽  
Dimethyl Acetal
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