Which alkene is formed from the following pai | vedclass

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(B) The reaction is a Wittig reaction between a carbonyl compound and an alkylidene phosphorane (phosphorus ylide).The reactants are $CH_3CH_2C(=O)CH_

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$4-	ext{methylhept-3-ene}$

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(B) The reaction is a Wittig reaction between a carbonyl compound and an alkylidene phosphorane (phosphorus ylide).The reactants are $CH_3CH_2C(=O)CH_3$ (butanone) and $Ph_3P=CHCH_2CH_2CH_3$ (propylidene triphenylphosphorane).The mechanism involves the formation of an oxaphosphetane intermediate,which decomposes to form the alkene and triphenylphosphine oxide $(Ph_3P=O)$.The reaction is: $CH_3CH_2C(=O)CH_3 + Ph_3P=CHCH_2CH_2CH_3 ightarrow CH_3CH_2C(CH_3)=CHCH_2CH_2CH_3 + Ph_3P=O$.The product is $3-	ext{methylhept-3-ene}$.

Which alkene is formed from the following pair of alkylidene phosphorane and carbonyl compound?

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