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Q.

Which of the following base does not react with B2H6to give [BH2(Base)2]+ [BH4] ?

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a

NH3

b

CH3NH2

c

(CH3)2NH

d

(CH3)3N

answer is D.

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Detailed Solution

B2​H6​ reacts with primary(1º)  and secondary(2º)  amine and form an ionic compound and gives unsymmetrical cleavage of diborane. However with tertiary(3º) amine, B2​H6​ shows it's symmetrical cleavage and forms an adduct as:-

B2​H6​+2N(CH3​)3​⟶2BH3​.N(CH3​)3​

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