1. Which statement of carbon nmr is not true? a) only the 1.1% of 13c present in

Question

1. Which statement of carbon nmr is not true?

a) only the 1.1% of 13c present in organic molecules, and not the 98.9% of 12c, is observable by nmr.

b) carbon-carbon coupling in the spectrum gives information about adjacent carbons.

c) Carbon NMR spectra exhibit much lower sensitivity than do 1h nmr.

d) With proton-decoupling, carbon spectra exhibit a single peak for each type of carbon.

e) carbon chemical shifts cover a much wider range than do proton nmr spectra.

2. how many 1h nmr signals would cis-1,2-dichlorocyclopropane give?

Explanation / Answer

1. D

2. 3

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