Which Site Will Grignard Reagent Attack: Ketone or Alkene?

[Aryamaan Thakur]

TL;DR

What product will be formed when reacted with Phenylmagnesium Bromide if the competition is between a carbon-oxygen double bond and a carbon-carbon double bond(as shown in figure)?

This is the given reaction:https://www.physicsforums.com/attachments/1559750554233-png.244625/

Where will the reaction take place - at ketone or at alkene? And why?

 

[TeethWhitener]

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