A) \[(C{{H}_{3}})B{{H}_{2}}\]
B) \[(C{{H}_{3}}){{B}_{2}}{{H}_{2}}\]
C) \[{{(C{{H}_{3}})}_{3}}{{B}_{2}}{{H}_{3}}\]
D) \[{{(C{{H}_{3}})}_{6}}{{B}_{2}}\]
Correct Answer: B
Solution :
\[\text{BC}{{\text{l}}_{\text{3}}}\text{+}{{\text{H}}_{\text{2}}}\frac{\text{Cu-Al}}{\text{45}{{\text{0}}^{\text{o}}}\text{C}}\underset{\begin{smallmatrix} \text{diborane} \\ X \end{smallmatrix}}{\mathop{{{\text{B}}_{\text{2}}}{{\text{H}}_{\text{6}}}}}\,\text{+HCl}\] \[\underset{X}{\mathop{{{\text{B}}_{\text{2}}}{{\text{H}}_{\text{6}}}}}\,\text{+4C}{{\text{H}}_{\text{3}}}\text{Cl}\xrightarrow{\text{Methylation}}\underset{Z}{\mathop{{{\text{(C}{{\text{H}}_{\text{3}}}\text{)}}_{\text{4}}}{{\text{B}}_{\text{2}}}{{\text{H}}_{\text{2}}}}}\,\]
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