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6. Why does addition product A predominate at the lower temperature (0°C)?

6. Why does addition product A predominate at the lower temperature (0°C)?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question 6
Questions 6 and 7 are based on the following reaction of 1,3- butadiene with HCl at different temperatures: CH₂=CH-CH=CH₂ HCI CH,=CH–CH–CH3 A CH₂ -CH=CH-CH3 B At 0°C, the following product composition is observed: product A (80%), product B (20%). At 100°C, the following product composition is observed: product A (25%), product B (75%). 6. Why does addition product A predominate at the lower temperature (0°C)? A. The reaction is equilibrium controlled: product A is more stable than product B, so product A predominates. B. The reaction is kinetically controlled: product A forms faster, so product A predominates. C. Product A predominates because it has more [] electron delocalization than product B. D. Product A is less sterically hindered, so it predominates.
Transcribed Image Text:Questions 6 and 7 are based on the following reaction of 1,3- butadiene with HCl at different temperatures: CH₂=CH-CH=CH₂ HCI CH,=CH–CH–CH3 A CH₂ -CH=CH-CH3 B At 0°C, the following product composition is observed: product A (80%), product B (20%). At 100°C, the following product composition is observed: product A (25%), product B (75%). 6. Why does addition product A predominate at the lower temperature (0°C)? A. The reaction is equilibrium controlled: product A is more stable than product B, so product A predominates. B. The reaction is kinetically controlled: product A forms faster, so product A predominates. C. Product A predominates because it has more [] electron delocalization than product B. D. Product A is less sterically hindered, so it predominates.
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A is less stable and B is more stable, the reason is hyper conjugative alpha H present in A is 1 and in B is 5. With the increase of conjugative alpha, H  stability increases.

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