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An Unknown Compound Has the Formula of C9H12

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An unknown compound has the formula of C9H12.The following 1H NMR peaks were observed: Doublet at Δ 1.22
Septet at Δ 2.83
Multiplet at Δ 7.09
From the data above,pick the compound below that fits the spectra data. An unknown compound has the formula of C<sub>9</sub>H<sub>12</sub>.The following <sup>1</sup>H NMR peaks were observed: Doublet at Δ 1.22 Septet at Δ 2.83 Multiplet at Δ 7.09 From the data above,pick the compound below that fits the spectra data.   A) I B) II C) III D) IV


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