Question 1

Given that tertiary H atoms react with a chlorine radical about 5.5 times faster than primary ones, estimate the ratio of the two monochlorinated products that result when 2,3-dimethylbutane undergoes free radical chlorination.

Accepted Answer

The answer of Given that tertiary H atoms react with...

Question 2

For the compound below, the number of 1°, 2° and 3° hydrogens, respectively is ________.

Accepted Answer

A)  1, 3, and 1 
B)  3, 6 and 2 
C)  3, 6 and 1 
D)  1, 6 and 0

Question 3

The monochlorination of butane with chlorine gas under photolysis will give two products. Draw both of them and then predict the product ratio.

Accepted Answer

The answer of The monochlorination of butane with chlorine gas...

Question 4

Draw the transition state for the hydrogen abstraction reaction shown below. (Hint: this is an endothermic reaction.) (CH₃)₃C-H + ∙Br → (CH₃)₃C∙ + H-Br

Accepted Answer

The answer of Draw the transition state for the hydrogen...

Question 5

The relative reactivity of the 1°: 2°: 3° hydrogens of (CH₃)₃CCH₂CH₃ in free radical chlorination is 1: 3.8: 5.0. Provide the structure of each monochlorination product, and estimate the relative amount of each in the mixture of monochlorinated products.

Accepted Answer

The answer of The relative reactivity of the 1°: 2°:...

Question 6

Which of the following depictions most closely resembles the structure of the transition state for the following acid-base reaction?

Accepted Answer

A)   
B)   
C)   
D)

Question 7

Predict the enthalpy (ΔH) value for the theoretical reaction below, and indicate whether it is endothermic or exothermic. The bond dissociation energy for each bond in Kcal/mol is shown below each reactant and product.

Accepted Answer

A)  +8 Kcal/mol, endothermic 
B)  -8 Kcal/mol, exothermic 
C)  +16 Kcal/mol, endothermic 
D)  +8 Kcal/mol, exothermic

Question 8

What is the hybridization of the positively charged carbon in (CH₃)₃C⁺?

Accepted Answer

The answer of What is the hybridization of the positively...

Exam 4: The Study of Chemical Reactions