The reaction of 1,3-butadiene with HCl produces two addition products. (See belo

ID: 939850 • Letter: T

Question

The reaction of 1,3-butadiene with HCl produces two addition products. (See below)

The relative amounts of the products that form is strongly temperature dependent. Here are the results:

At 0oC, the following product composition is observed: product I (71%), product II (29%).

At 42oC, the following product composition is observed: product I (15%), product II (85%).

ANSWER THE FOLLOWING QUESTION: Why does the addition product II predominate at the higher temperature (42oC)?

Select one:

A. Product II is less sterically hindered, so it predominates.

B. At higher temperature, the reaction is equilibrium controlled: product II is more stable than product I, so product II predominates.

C. Product II predominates at higher temperature because it has more p electron delocalization than product I.

D. At higher temperature, the reaction is kinetically controlled: product II forms faster, so product II predominates.

H-CI CH2-CH-CH-CH3 CH2CH=CH-CH3 + CH -CH-CH-CH2 CI Cl

D.at higher temperature the reaction is kinetically controlled : product II forms faster, so it predominates

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