In the Fourth Step in Olefin Metathesis the ____

question 84

Multiple Choice

In the fourth step in olefin metathesis the ____.

• A)metal alkylidene ([M]=)undergoes a [2+2] pericyclic addition with an alkene alkene to form a metalcyclobutane intermediate
• B)metalcyclobutane undergoes a reverse [2+2] addition (i.e.,retro [2+2] reaction)to generate a new metal alkylidene
• C)reaction of the new metal alkylidene with a new alkene (by [2+2] addition)to generate a new metalcyclobutane intermediate
• D)formation of the alkene product from a retro [2+2] reaction of the second metal alkylidene
• E)alkene reacts with a second alkene by [2+2] addition

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