# Question & Answer: Draw the structure that corresponds to the following information: Molecular formula…..

Draw the structure that corresponds to the following information: Molecular formula: C_4H_8O Proton-decoupled ^13 C NMR: delta 26.5, delta 68.4. Incorrect. This structure matches the molecular formula, but it would show three ^13 C resonances in the spectrum, not the two in the data set.

Molecular formula = C4H8O
Since the formula is CnH2nO, the molecule should have one double bond or it should be a cyclic compound.

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13CNMR = $\delta$26.5, $\delta$68.4

Since we have only two peaks in the 13C NMR, the molecule contains chemically two different carbon atoms.
Ether carbon, show a chemical shift at approx. $\delta$68, the molecule could be ether molecule.

Therefore, the only option will be the molecule should be a cyclic ether.
Therefore, the molecule is Tetrahydrofuran