1) In H NMR spectroscopy, why is the peak for a vinyl proton, C=C-H, shifted downfield...

1) In H NMR spectroscopy, why is the peak for a vinyl proton, C=C-H, shifted downfield relative to that of an alkane proton, C(sp³)-H? Be sure to use the following terms in your answer: pi-electrons, induced magnetic field, and resonance.

2) In H NMR spectroscopy, why is the peak for a -CH₂F group shifted downfield relative to that for a -CH₂Br group? Be sure to use the following terms in your answer: electronegative, deshielded, magnetic field, and frequency.

Expert Solution

queen_honey_blossom answered 2 years ago

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