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33 Cards in this Set

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function of IR spectroscopy
infrared region

measures intramolecular vibrations and rotations
direction of vibration frequencies ?
high --> low

(left end --> right end)
frequencies:

alcohol OH
3300

broadest
secondary NH
3300

sharper
alkyne CH
3300

sharpest
alkene CH
3100
carboxylic acid OH
3100
alkane CH
2900
aldehyde CH
2800
alkyne CC bond
2200
carbonyl CO bond
1700
alkene CC bond
1600
alkane CC bond
1200
ether CO bond
1100
function of NMR ?
measures equivalent protons in a magnetic field
direction of field ?
upfield --> downfield

(left --> right)
which field is shielded ?

which field is deshielded ?
upfield

downshield is deshielded
frequencies:

carboxylic acid OH
10 - 12
aldehyde CH
10
Ph-H
7
Ph-OH
7
amide
7
alkene CC bond
5
primary CX (alkyl halide)
4
alkyne CC bond
3
alcohol OH
3
primary amine
3
tertiary carbon CH
0 - 2
isopropyl group shows what peaks ?
septet and doublet
function of mass spectroscopy ?
1. measures mol. weight of a molecule

2. identifies molecule by fragmentation patterns

3. identifies heteroatoms by their isotopic ratios
pH indicators:

red
very acidic
green
neutral
purple
very basic