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20 Cards in this Set
- Front
- Back
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O-H
|
3400 cm-1
m |
|
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N-H
|
3500 cm-1
m. |
|
|
C-H
|
3000 cm-1
aldehydes: w, aromatics/alkanes/alkenes/alkynes s. |
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|
C /// N
|
2250 cm-1
m. |
|
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C /// C
|
2150 cm-1
m-w. |
|
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C = O
|
1715 cm-1
s. |
|
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C = C
|
1650 cm-1
m-w |
|
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C-O
|
1100 cm-1
s. |
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N = O
|
1600-1500 / 1400-1300 cm-1
s. |
|
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C-X
|
F: 1400-1000
Cl: 800-600 Br/I: <600 s. |
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Wavelength
|
distance between any two peaks of a wave
|
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Wavenumber
|
the number of wavelengths that fit into one centimeter (cm-1)
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IR-active vibration
|
a vibration that changes the dipole moment of the molecule allowing it to absorb infrared light
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IR-inactive vibration
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a vibration that does not change the dipole moment of the molecule and thus cannot absorb infrared light
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fingerprint region
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portion of the infrared spectrum between 600 and 1400 cm-1 where many complex vibrations occure
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conjugated double bonds
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double bonds that alternate with single bonds, so their pi bonding orbitals can overlap with each other
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overtone
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weak absorption at a multiple of the fundamental vibration frequency
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radical cation
|
a positively charged ion with an unpaired e-
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fragmentation
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the breaking apart of a molecular ion upon ionization in a mass spectrometer
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base peak
|
the strongest peak in a mass spectrum
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