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Cross Aldol Condensation

The number of...

Question

The number of stereoisomers obtained by bromination of $t r a n s - 2 - b u t e n e$ is:

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Solution

$B r_{2}$ undergo anti-addition on $C = C$ bonds as:

It leads to the formation of meso product.

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Q. The number of stereoisomers obtained by bromination of trans-2-butene is:

Q. The no. of stereoisomeries obtained by bromination of trans 2-butene is :

Assertion : Addition of bromine to trans-2-butene yields meso-2, 3-dibromobutane

Reason : Bromine addition to an alkene is an electrophilic addition.

Q. Write down the structures of the stereoisomers formed when cis-2-butene is treated with bromine.

Q. A mixture of

1

-butene (1 equivalent) and trans-

2

-butene (1 equivalent) reacts with 2 equivalents of HCl. If there are no carbocation rearrangements, how many different monochlordes, including stereoisomers, will form?

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Cross Aldol Condensation

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