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19 Cards in this Set
- Front
- Back
O-H
Wavenumber? |
3400
|
|
N-H
Wavenumber? |
3400
|
|
C-H
Wavenumber? |
3000
|
|
CN
Wavenumber? |
2250
|
|
C triple bond C
Wavenumber? |
2150
|
|
C=O
Wavenumber? |
1775
|
|
C-O
Wavenumber? |
1100
|
|
C=C
Wavenumber? |
1650
|
|
What is the relationship b/w wavenumber and enegry?
|
proprtionate
E = hv |
|
Endo DB:
relationship b/w ring size and frequency |
inc ring size (up to 60 degree angle)
inc frequency, inc K |
|
Effect to f when adding alkyl groups to endo db?
|
freq inc
|
|
EXO DB
relationship b/w ring size and frequency |
inc ring size
dec frequency |
|
4000-2500 cm-1
what functional groups? |
O-H
N-H C-H |
|
2500-2000
what functional groups? |
CtriplebondC
CN (triple) X=C=Y (C,O, N,S) |
|
1800-1650
what functional group? |
C=O
|
|
1650-1550
what functional groups? |
C=N
C=C |
|
at 1550
what functional group? |
N=O
|
|
1550-650
what functional groups? |
fingerprint region
C-Cl C-O C-N C-C |
|
What makes a molecule IR active?
|
it must have a DIPOLE moment
usually b/c of asymmetry |