In the reaction 2X + B_2H_6 rightarrow [BH_2( | vedclass

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Question

(A) Small amines such as $NH_3$,$CH_3NH_2$,and $(CH_3)_2NH$ undergo unsymmetrical cleavage of diborane to form ionic products of the type $[BH_2(X)_2]

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$A, B, C$

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(A) Small amines such as $NH_3$,$CH_3NH_2$,and $(CH_3)_2NH$ undergo unsymmetrical cleavage of diborane to form ionic products of the type $[BH_2(X)_2]^+ [BH_4]^-$.The reaction is: $B_2H_6 + 2X \rightarrow [BH_2(X)_2]^+ [BH_4]^-$.Large amines,such as $(CH_3)_3N$,undergo symmetrical cleavage of diborane to form borane-amine adducts: $B_2H_6 + 2N(CH_3)_3 \rightarrow 2H_3B \leftarrow N(CH_3)_3$.Therefore,$X$ can be $NH_3$,$CH_3NH_2$,or $(CH_3)_2NH$.

In the reaction $2X + B_2H_6 \rightarrow [BH_2(X)_2]^+ [BH_4]^-$,the amine$(s)$ $X$ is(are):

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