Topic 7 Flashcards
1
Q
Base peak
A
Tallest peak- The most abundant species (most stable)
2
Q
Molecular ion peak
A
Furthest to the right- Ion of the original molecule (M+)
3
Q
Other peaks
A
Fragments of the original molecule
4
Q
Isotope peaks
A
Cl35 (75%) Cl37(25%)
Br79 (50%) Br81 (50%)
C13 (1.1%)
5
Q
Common values (15)
A
CH3
6
Q
Common values (17)
A
OH
7
Q
Common values (45)
A
COOH
8
Q
How infrared spectroscopy works
A
Substances exposed to radiation
Molecules absorb IR at a particular wavelength
Molecules vibrate and bond deformations occur
More polar bonds require more energy to deform, so absorb more and have a deeper peak
9
Q
Region unique to each substance
A
Fingerprint region
