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Proton Magnetic Res Spectrum Question? Proton Magnetic Res Spectrum Question?
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  #1  
Old 12-17-2004, 04:32 AM
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Default Answered: 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?
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Best Answer - Posted by Gervald F5191
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.

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Old 12-17-2004, 04:32 AM
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Default Proton Magnetic Res Spectrum Question?
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.
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  #3  
Old 12-17-2004, 06:50 AM
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Default Proton Magnetic Res Spectrum Question?
Shielding.

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