nmr Flashcards

1
Q

what does NMR stand for

A

nuclear magnetic resonance

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2
Q

What are nucleons

A

protons and neutrons

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3
Q

when do nuclei have spin

A

odd number of nucleons (protons and neutrons)

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4
Q

What is resonance

A

The nucleus has 2 diff spin states with diff energy.

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5
Q

What is used as a refrence for the standard shift

A

TMS

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6
Q

when is a deuterated solvent used

A

C13 and H1 both present. Will replace H1 with H2. Normally CDCL3 used

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7
Q

The non-toxic, inert substance TMS is used as a standard in recording both 1H and 13C

n. m.r. spectra.
(i) Give two other reasons why TMS is used as a standard in recording n.m.r. spectra

A

can be easily removed

doesn’t interfere with other peaks

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