Volume 11, Issue 1

Common Dimer - Responsible for the Trends in pKaHs of Both Pyridazenium Cations and Di-cations: An Educational Perspective
Original Research
A species formed by dimerization from monoprotonated 1,2-pyridazine i.e., 1,2-pyridazenium cation that was optimized by DFT calculations is identified as a common dimer to explain the systematic changes in the pKaHs of both Pyridazenium cations and Pyridazenium di-cations.
World Journal of Chemical Education. 2023, 11(1), 4-6. DOI: 10.12691/wjce-11-1-2
Pub. Date: February 05, 2023
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Why Cyclohexatriene (C6H6, pKa = 43) is Less Acidic than Cyclopentadiene (C5H6, pKa = 15) and Cycloheptatriene (C7H8, pKa = 36): A Freshmen Chemical Education Undergraduate Exercise
Original Research
The pKa of Cyclohexatriene (Benzene) is 43. And that of Cyclopentadiene and Cycloheptatriene are 15 and 36 respectively. In the ascending order of number of carbon atoms of the three cyclic hydrocarbons, Cyclohexatriene lies between Cyclopentadiene and Cycloheptatriene. It is a tempting belief of undergraduate chemists who begin to pursue their undergraduate course that the pKas will be in the same increasing order with increase in ring size. But surprisingly pKa of Cyclohexatriene is more than that of either Cyclopentadiene and or Cycloheptatriene. Suitable explanations are given.
World Journal of Chemical Education. 2023, 11(1), 1-3. DOI: 10.12691/wjce-11-1-1
Pub. Date: January 16, 2023
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