First slide

Diborane

Question

From $B_{2} H_{6},$ all the following can be prepared except

Easy

A

$B_{2} O_{3}$
B

$H_{3} {BO}_{3}$
C

$B_{2} {({CH}_{3})}_{6}$
D

${NaBH}_{4}$

Solution

$B_{2} H_{6} + 3 O_{2} \overset{}{\to} B_{2} O_{3} + 3 H_{2} O + Heat B_{2} H_{6} + 6 H_{2} O \overset{}{\to} H_{3} {BO}_{3} + 6 H_{2} 2 NaH + B_{2} H_{6} \overset{ether}{\to} {NaBH}_{4}$

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