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Chemistry / Organic Chemistry 2 / Chapter 16 / Problem 16.39

Organic Chemistry | 2nd Edition | ISBN: 9781118454312 | Authors: David R. Klein

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A compound with molecular formula C8H18 exhibits a 1 H NMR

Chapter 16, Problem 16.39

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QUESTION:

A compound with molecular formula C8H18 exhibits a 1 H NMR spectrum with only one signal. How many signals would you expect in the 13C NMR spectrum of this compound?

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QUESTION:

A compound with molecular formula C8H18 exhibits a 1 H NMR spectrum with only one signal. How many signals would you expect in the 13C NMR spectrum of this compound?

ANSWER:

Step 1 of 4

The molecular formula of the compound is \(\mathrm{C}_{8} \mathrm{H}_{18}\).

Now we have to calculate the degree of unsaturation.

Degree of unsaturation or hydrogen deficiency index (HDI):

\(\mathrm{HDI}\) of the compound can be calculated by using the following formula:

\(H D I=\frac{1}{2}(2 C+2+N-H-X)\)

Here,

\(C\) is the number of carbon atoms.

\(\mathrm{N}\) is the number of nitrogen atoms.

\(\mathrm{H}\) is the number of hydrogen atoms.

\(X\) is the number of halogen atoms.

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