In dimethoxy methane which protons are less shielded and why
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Dimethoxymethane also called methylal is a flammable colorless liquid with a low boiling point, low viscosity and excellent dissolving power. It has a chloroform like odor and a pungent taste.
The higher the electron density around the nucleus, the higher the opposing magnetic field B₀ from the electrons the greater the shielding. Hydrogen nucleus Because protons experience lower external magnetic field, it needs a lower frequency to achieve resonance and therefore the chemical shift up filed.(lower ppms)
If electron density around nucleus electron decreases the opposing magnetic field becomes small and therefore the nucleus feel more external magnetic field and therefore it is said to be De-shielded, Because the protons experience high external magnetic field it needs a high frequency to achieve resonance and therefore chemical shift downwards.
The higher the electron density around the nucleus, the higher the opposing magnetic field B₀ from the electrons the greater the shielding. Hydrogen nucleus Because protons experience lower external magnetic field, it needs a lower frequency to achieve resonance and therefore the chemical shift up filed.(lower ppms)
If electron density around nucleus electron decreases the opposing magnetic field becomes small and therefore the nucleus feel more external magnetic field and therefore it is said to be De-shielded, Because the protons experience high external magnetic field it needs a high frequency to achieve resonance and therefore chemical shift downwards.
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