Karplus dependence of spin–spin coupling constants revisited theoretically. Part 1: second-order double perturbation theory

2013 ◽  
Vol 15 (41) ◽  
pp. 18195 ◽  
Author(s):  
Irina L. Rusakova ◽  
Leonid B. Krivdin
1970 ◽  
Vol 18 (4) ◽  
pp. 385-388 ◽  
Author(s):  
Waldemar Adam ◽  
Alec Grimison ◽  
Phillip A. Sprangle

1977 ◽  
Vol 55 (4) ◽  
pp. 619-624 ◽  
Author(s):  
Roderick E. Wasylishen ◽  
Harold M. Hutton

Carbon-13, proton nuclear spin–spin coupling constants have been measured for a number of 4-substituted isothiazoles. The observed values are compared with those measured in other heterocyclic systems and those calculated in the parent and related heterocyclics using finite perturbation theory and semi-empirical molecular orbital theory at the CNDO/2 and INDO levels of approximation.


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