Fill in the blank spaces. In the NMR spectrum of ethyl bromide, the methyl hydro

Question

Fill in the blank spaces.

In the NMR spectrum of ethyl bromide, the methyl hydrogens have delta = 1.7 ppm, the methylene hydrogens have delta =3.3 ppm, and J = 7 Hz. The number of peaks given by the methyl hydrogens is with the approximate area ratio: These peaks are separated from one another by Hz. The number of peaks given by the methylene hydrogens is with the approximate area ratio: These peaks are separated by Hz. The total area of the methyl peaks compared to the methylene peaks is in the ratio: Of these two groups of peaks, the peaks are further downfield. The chemical shift difference between these peaks of 1.6 ppm corresponds in a 180 MHz instrument to Hz and in a 250 MHz instrument to Hz.

Explanation / Answer

The number of peaks given by methyl hydrogen is 3

With the approximate area ratio: 1:2:1

These peaks are separated from on another by 7 Hz

The number of peaks given my methylene hydrogen is 4.

With the approximate area ratio 1:3:3:1

These peaks are separated by 7 Hz

The total area of the methyl peaks compared to methylene peaks is in the ratio 3:2

Of these two group peaks the    Methylene hydrogen   peaks are further downfiled. The chemical shift between thes peaks of 1.6 ppm correspond in a 180 MHz to 306   Hz and In 250 MHz instrument to 612    Hz

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