The [2+2] cycloaddition reaction of ethylene to form cyclobutane does not occur because _____. ![The [2+2] cycloaddition reaction of ethylene to form cyclobutane does not occur because _____. A) the reaction is forbidden as determined by the frontier molecular orbital analysis B) the reaction is allowed as determined by the frontier molecular orbital analysis C) the reaction is allowed, and ethylene collides in a suprafacial manner D) the reaction is allowed, and ethylene collides in an antarafacial manner](https://d2lvgg3v3hfg70.cloudfront.net/TB7078/11ead7c8_9d4c_0fbc_84b0_fbdf5d201147_TB7078_00.jpg)
A) the reaction is forbidden as determined by the frontier molecular orbital analysis
B) the reaction is allowed as determined by the frontier molecular orbital analysis
C) the reaction is allowed, and ethylene collides in a suprafacial manner
D) the reaction is allowed, and ethylene collides in an antarafacial manner
Correct Answer:
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