The suitable reaction steps to carry out the following transformation is :

(i) B H_{3}, T H F - -------- \to (i i) H_{2} O_{2}, N a O H H I O_{4} - -- \to

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O_{s} O_{4} - ------------ \to (C H_{3})_{3} C . C O O H, O H^{-} K_{3} C r_{2} O_{7} \cdot H_{2} S O_{4} - --------- \to H_{2} O

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(i) B H_{3}, T H F - -------- \to (i i) H_{2} O_{2}, N a O H H I O_{4} - --- \to C H_{2} C l_{2}

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H_{2} O, H_{2} S O_{4} (d i l .) - --------- \to P C C - --- \to C H_{2} C l_{2}

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Solution

The correct option is C $(i) B H_{3}, T H F - -------- \to (i i) H_{2} O_{2}, N a O H H I O_{4} - --- \to C H_{2} C l_{2}$
The suitable reaction steps to carry out the given transformation is:
$(i) B H_{3}, T H F - -------- \to (i i) H_{2} O_{2}, N a O H H I O_{4} - --- \to C H_{2} C l_{2}$
The first step is hydroboration oxidation reaction. A molecule of water is added to carbon carbon double bond. $- O H$ group is added to terminal $C$ atom. In the next step, the primary alcohol is oxidised to aldehyde.

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