(Solved): An unknown compound \( \mathbf{A} \) (molecular formula \( \mathrm{C}_{7} \mathrm{H}_{14} \mathrm{ ...

An unknown compound \( \mathbf{A} \) (molecular formula \( \mathrm{C}_{7} \mathrm{H}_{14} \mathrm{O} \) ) was treated with \( \mathrm{NaBH}_{4} \) in \( \mathrm{CH}_{3} \mathrm{OH} \) to form compound \( \mathbf{B} \) (molecular formula \( \mathrm{C}_{7} \mathrm{H}_{16} \mathrm{O} \). Compound \( \mathbf{A} \) has a strong absorption in its \( \mathbb{R} \) spectrum at \( 1716 \mathrm{~cm}^{-1} \). Compound \( \mathbf{B} \) has a strong absorption in its IR spectrum