Proton Magnetic Res Spectrum Question?

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Proton Magnetic Res Spectrum Question?

The proton magnetic resonance spectrum of N,N-dimethylformamide shows two different chemical shifts for the hydrogen atoms on the methyl group. This phenomena is not due to spin-spin coupling.

If not, what is it due to?

2007-04-12 19:19:49 · 2 answers · asked by jeanettervetr 2 in Science & Mathematics ➔ Chemistry

2 answers

If you work out the resonance hybrids for this molecule, the pi system includes the N atom, which will therefore be planar and not pyramidal. One of the CH3 groups will therefore be a lot nearer the O atom than the other, and will be fixed in that orientation.

2007-04-12 19:54:03 · answer #1 · answered by Gervald F 7 · 0⤊ 0⤋

Shielding.

2007-04-13 02:57:40 · answer #2 · answered by ag_iitkgp 7 · 0⤊ 0⤋