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An Unknown Compound X Has the Molecular Formula C10H11O2Br

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An unknown compound X has the molecular formula C10H11O2Br. Compound X shows a strong absorption in its IR spectrum at 1700 cm-1. The 1H NMR spectral data for compound X is given below. What is the structure of compound X? An unknown compound X has the molecular formula C<sub>10</sub>H<sub>11</sub>O<sub>2</sub>Br. Compound X shows a strong absorption in its IR spectrum at 1700 cm<sup>-1</sup>. The <sup>1</sup>H NMR spectral data for compound X is given below. What is the structure of compound X?   A)  Only I B)  Only II C)  Only III D)  I or II


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