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In an addition reaction to an alkene, the pie bond plays the role of ?

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Answer:

The pi bond is electron rich and takes the role of the nucleophile seeking out an electrophile with its full or partial positive charge. Using a general molecule X-Y as the electrophile reacting with ethene, the atoms 'X' and 'Y' are added to the carbon chain across the vinylic carbons as shown below.

Step-by-step explanation:

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