why-does-the-wittig-reaction-exhibit-regiospecificity-but-not-stereospecificity

Question

Why does the Wittig reaction exhibit regiospecificity but not stereospecificity?

Accepted Answer

It controls the position of the double bond but allows for E/Z isomer formation.

Answer

It exclusively produces Z-isomers, regardless of conditions.

Answer

It does not affect the position or stereochemistry of the double bond.

Answer

It controls the stereochemistry of the product exclusively.