Question

Organic Chemistry

Coupling in NMR:

Question 1:

What equation is used to determine the number of sub-peaks seen in a single H NMR signal?

(type in answer)

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Question 2:

When a single H NMR peak is split into 3 pieces it's a ____.

(type in answer)

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Question 3:

When a single H NMR peak has no coupling it's called a __.

(type in answer)

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Question 4:

OH and NH hydrogens ___ show coupling in free-rotating systems.

a.) always

b.) sometimes

c.) never

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Question 5a:

It is impossible to have an integration of >4 H.

a.) True

b.) False

Question 5b:

H with the same chemical shift show normal coupling if at the appropriate distance and angles.

a.) True

b.) False

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Answer 1

1. Spin - spin splitting equation is used to determine numner of sub peak in a peak.

2.when s single peal split into three peak, it is called a triplet

3.pure signal or singlet