First slide

13th group or boron group

Question

Which of the following does not react with diborane?

Difficult

A

$C l_{2}$
B

$B r_{2}$
C

$I_{2}$
D

$H_{2} O$

Solution

Diborane does not react with $I_{2}$ as the $∆ G$ of the process is positive. It however, reacts with chlorine and bromine violently and gives a controlled yield.
$B_{2} H_{6} + C l_{2} \to B_{2} H_{5} C l + H C l B_{2} H_{6} + C l_{2} \to B C l_{3} + H_{2}$

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