The stereoselectivity of the wittig reaction is due in part to the choice of base and steric effects. True or False

True

Explanation: The steroselectivity of the wittig reaction is due in part to the choice of base and steric effects , but largely controlled by electronic effects. Stabilized ylides appear to form the Eisomer of the alkene product, whereas unstabilized ylides tend to form the z isomer as the major product.