Like other strong nucleophiles, triphenylphosphine attacks and opens epoxides. Theinitial product (a betaine) quickly cyclizes to an oxaphosphetane that collapses to analkene and triphenylphosphine oxide.(a) Show each step in the reaction of trans-2,3-epoxybutane with triphenylphosphine togive but-2-ene. What is the stereochemistry of the double bond in the product?

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Q: Like other strong nucleophiles, triphenylphosphine attacks and opens epoxides. Theinitial product (a…

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