polar effect
Recently Published Documents


TOTAL DOCUMENTS

80
(FIVE YEARS 0)

H-INDEX

14
(FIVE YEARS 0)

2020 ◽  
Vol 9 (8) ◽  
pp. 5319-5333
Author(s):  
P. S. S. Nagalakshmi ◽  
N. Vijaya
Keyword(s):  


2018 ◽  
Vol 25 (4) ◽  
pp. 1364-1370 ◽  
Author(s):  
Su Zhao ◽  
Dengming Xiao ◽  
Peng Xue ◽  
Ruishuang Zhong ◽  
Yunkun Deng


2016 ◽  
Author(s):  
P. Muller
Keyword(s):  


2016 ◽  
Author(s):  
V. Gold
Keyword(s):  


2016 ◽  
Author(s):  
Victor Gold
Keyword(s):  


2015 ◽  
Vol 34 (2) ◽  
pp. 255
Author(s):  
Goran Stojković ◽  
Elizabeta Dimitrieska-Stojković ◽  
Emil Popovski

<p>The protonation of ten aliphatic amides in sulfuric acid media was studied by UV spectroscopy. The p<em>K</em><sub>BH</sub><sup>+ </sup>values and solvation parameters were calculated using Yates and McClelland Method, Excess Acidity Method and Bunnett and Olsen Method. p<em>K</em><sub>BH</sub><sup>+</sup> values were –1.44, –1.15, –0.80, –0.32, –1.13 and –0.80 for formamide, dimethylformamide, diethylformamide, diisopropylformamide, diisobutyl­form­amide and dibutylformamide, respectively. According to the p<em>K</em><sub>BH</sub><sup>+</sup> values obtained for acetamide, dimethylacetamide, diethylacetamide and diisopropylacetamide (–0.57, –0.29, –0.32 and 0.36, respectively), analogous acetamides were more basic than formamides. Applying the Hammett’s equation, satisfactory correlation could be gained only for some formamides, the basicities of which increased linearly with the inductive effect of the electron donating groups. From Taft’s approach, it can be concluded that the polar effect slightly dominates over the steric one. Excellent correlation between p<em>K</em><sub>BH</sub><sup>+ </sup>and solvation parameters<em> m* </em>was achieved for formamide, dimethylformamide and diethylformamide. At half- and full-protonation, better correlation was obtained for formamides than for acetamides.</p>



Tetrahedron ◽  
2014 ◽  
Vol 70 (48) ◽  
pp. 9204-9213 ◽  
Author(s):  
Tarng-Shiang Hu ◽  
Kuan-Ting Lin ◽  
Chih-Chin Mu ◽  
Hsiu-Ming Kuo ◽  
Ming-Chou Chen ◽  
...  
Keyword(s):  


2014 ◽  
Vol 27 (5) ◽  
pp. 387-391 ◽  
Author(s):  
Gérard Audran ◽  
Matisse Bim Batsiandzy Ibanou ◽  
Paul Brémond ◽  
Sylvain R. A. Marque ◽  
Germain Obame ◽  
...  
Keyword(s):  


RADIOISOTOPES ◽  
2010 ◽  
Vol 59 (6) ◽  
pp. 379-386 ◽  
Author(s):  
Noriaki KATAOKA ◽  
Hiroshi IMAIZUMI ◽  
Hiroshi SAITO ◽  
Takayuki SATO ◽  
Naoki KANO


Sign in / Sign up

Export Citation Format

Share Document