Spectroscopy Flashcards
What is the relationship between energy and frequency?
The are directly proportional.
What does NMR stand for?
Nuclear magnetic resonance spectroscopy.
What happens when a hydrogen nucleus is submitted to a strong magnetic field?
They spin to face the north or south.
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What does NMR do?
It detects hydrogens in various functional groups. It also is able to tell you the position of the groups through splitting.
What does deshielding do to the position of the peaks on a NMR spectrometer?
Move them to the left.
What does shielding do to the position of the peaks on a NMR spectrometer?
Move them to the right.
What do splitting patterns show you?
It gives you the position of the hydrogen. From two splits you know that its next to a functional group with one hydrogen in it as 2-1 = 1.
What is on the x-axis on a NMR spectrometer?
Chemical shift.
What is on the y-axis on a NMR spectrometer?
Peak height.
How many chemical environments are in ethanol? Name them.
- OH, CH3, and CH2.
What do chemical environments look like on the NMR spectrum?
Peaks.
Why does an OH functional group have 0 splits?
Because the OH is able to hydrogen bond.
How many chemical shifts does ethanoic acid have?
2, CH3, C-OH
How many chemical shifts/environments does butan-2-one have?
5
What is the word used for the alternating single and double bonds in a molecule?
Conjugation.
