selectivity principle
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scholarly journals Reactivity-Selectivity Principle: Phenyl Group in Indazole Makes It More Lucid

2021 ◽  
Author(s):  
Sanjeev Rachuru ◽  
Jagannadham Vandanapu
Keyword(s):  
Free Energy ◽  
Undergraduate Students ◽  
Phenyl Group ◽  
Linear Free Energy Relationship ◽  
Resonance Structures ◽  
Linear Free Energy ◽  
Reaction Constants ◽  
Selectivity Principle

Linear free energy relationship (LFER) plots are constructed for the deprotonation equilibriums (pKaH+) of pyrazolium and indazolium (benzopyrazolium) cations. The reaction constants Taft * and Hammett  are found to be 2.75 and 1.32 for deprotonation (pKaH+) of pyrazolium and indazolium cations respectively. Higher value of Taft * than the Hammett  is explained in terms of extra stability of the indazolium cation due to its greater number of resonance structures. This article is an exercise to undergraduate students for writing different resonance structures of indazolium cation.

ChemInform Abstract: Selectivity in the Reactions of Less Stable Carbocations with Magnesium Halides in Aprotic Solvents. A Theoretical Approach to the Constant Selectivity Principle.

ChemInform ◽  
2010 ◽  
Vol 26 (41) ◽  
pp. no-no
Author(s):  
A. G. MARTINEZ ◽  
R. M. ALVAREZ ◽  
E. TESO VILAR ◽  
A. G. FRAILE ◽  
J. OSIO BARCINA ◽  
...  
Keyword(s):  
Theoretical Approach ◽  
Aprotic Solvents ◽  
Selectivity Principle
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