Why is the pka value of cycloheptatriene so much greater than that of cyclopentadiene? Where pka...
The pka of cyclopentadiene is found to be 16 while, by contrast, that of cycloheptatriene is found to be 36. Explain the large difference found in the pka values.
CHM 250 for 10 c)Cyclopentadiene is much more acidic than cycloheptatriene. (Ka cyclopentadiene, Ka 103% for cycloheptatriene.) explain why? H 3 points H H H H H H H H H H H T T 2) Draw the Molecular Orbital diagrams (Frost circle) of Benzene and cyclobutadiene in the ground state. Specify whether the molecule is aromatic/antiaromatic a) Benzene aromatic/antiaromatic (4+1) aromatic/antiaromatic (4+1) b) Cyclobutadiene 13 (2 1. O3 2. Zn/H20 -Эн -Эн H I A) I and II B)...
Explain why cyclopentadiene (pKa 16) is many orders of magnitude more acidic than cyclopentane (pKa > 50). (Hint: Draw the structural formula for the anion formed by removing one of the protons on the −CH2− group, and then apply the Hückel criteria for aromaticity.) Explain why cyclopentadiene (PK, 16) is many orders of magnitude more acidic than cyclopentane (pka > 50). (Hint: Draw the structural formula for the anion formed by removing one of the protons on the -CH2- group,...
Why is the concentration of pyrene used to determine CMC for SDS so much greater than the corresponding concentration used for determination of this value for RL?
If the pH of the solution is greater than the pKa, the predominant species in the solution will be O protonated O deprotonated
Question 17 Why were prehistoric insects so much larger than their modern day counterparts? Type your answer Question 17 Why were prehistoric insects so much larger than their modern day counterparts? Type your answer
Can an Rf value be less than 0? Can it be greater than 1? Why or why not?
2.2 Nitromethane (CH3NO2, pka = 10) is more acidic than most organic acids. Explain why nitromethane is so much more acidic than ethane (pka = 60). Write the chemical equations to illustrate the acidity of the compounds. Include valid Lewis dot structures (including formal charge) and resonance structures, if relevant. (6)
Why is RNA capable of assuming a much greater variety of structure than DNA? (4 marks)
why does the pka for h2so4 and h2so3 differ so greatly but the pka of h3po4 and h3po3 are essentially tbe same but different?