Question

Give the structure that corresponds to the following molecular formula and 1H NMR spectrum: C4H10O2: δ 1.36 (3H, d, J = 5.5 Hz); δ 3.32 (6H, s); δ 4.63 (1H, q, J = 5.5 Hz)

Answer 1

Answer on Question #67368 - Chemistry - Organic Chemistry

Task:

Give the structure that corresponds to the following molecular formula and 1H NMR spectrum:

$\mathrm{C_4H_{10}O_2}$ : $\delta$ 1.36 (3H, d, J = 5.5 Hz); $\delta$ 3.32 (6H, s); $\delta$ 4.63 (1H, q, J = 5.5 Hz)

Solution:

Based on the positions of the proton signals, it is possible to propose a structure for the compound C4H10O2. This is 1,1-dimethoxyethane.

$\mathrm{CH}_3 - \mathrm{CH}(\mathrm{OCH}_3)_2$

Schematic 1H NMR spectrum:

$\delta$ 1.36 is a doublet (3H, methyl group, $-\mathrm{CH}_3$ );

$\delta$ 3.32 is a singlet (6H, two methoxy groups, 2 -O-CH3);

$\delta$ 4.63 is a quartet (1H, methine group, -CH).

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