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Question

In the reaction,
2X+B2H6[BH2(X2)]+[BH4]
'X' cannot be ?

A
NH3
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B
CH3NH2
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C
(CH)3)2NH
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D
(CH3)3N
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Solution

The correct option is C (CH3)3N
Answer:- (D) (CH3)3N
B2H6 reacts with primary(1º) and secondary(2º) amine and form an ionic compound and gives unsymmetrical cleavage of diborane. However with tertiary(3º) amine, B2H6 shows it's symmetrical cleavage and forms an adduct as:-
B2H6+2N(CH3)32BH3.N(CH3)3

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