Correlation Tables

IR Correlation Table:
Typical IR Absorption Frequencies For Common Functional Groups

Bond Functional Group Frequency in cm-1 (Intensity*)
C-H Alkane 3000-2850 (s)
-CH3 1450 and 1375 (m)
-CH2- 1465 (m)
Alkene 3100-3000 (m), 1000-650 (s)
Aromatic 3100-3050 (s), 900-690 (s)
Alkyne (terminal) 3300 (s)
Aldehyde 2850 and 2750 (w)
C=C Alkene 1630 (w-m)
Aromatic 1600-1475 (w-m)
C-C Alkyne 2150-2100 (w-m)
C=O Aldehyde 1740-1720 (s)
Ketone 1725-1705 (s)
Carboxylic Acid 1730-1700 (s)
Ester 1750-1730 (s)
Amide 1670-1640 (s)
Anhydride 1810 and 1760 (s)
Acid Chloride 1800 (s)
C-O Alcohol, Ether, Ester, Carboxylic Acid, Anhydride 1300-1000 (s)
O-H Alcohol, Phenol
Free 3650-3600 (m)
Hydrogen-bonded 3500-3200 (m)
Carboxylic Acids 3300-2400 (m)
N-H Primary and Secondary Amine and Amide 3550-3060 (m-s); 1640-1550 (m-s)
C-N Amine 1250-1000 (m-s)
C=N Imine and Oxime 1690-1640 (w-s)
C=N Nitrile 2260-2240 (m)
N=O Nitro (R-NO2) 1550 and 1350 (s)
C-Cl Chloride 800-600 (s)

* s = strong; m = medium; w = weak

1H NMR Correlation Table:
Chemical Shift Values for Specific Types of Protons

Type of Proton Approximate
d Value
Alkane
methyl: (RCH3) 0.9
Methylene: (R2CH2) 1.3
Methine: (R3CH) 1.4
Allylic: (R2C=CRCHR2 2
Benzylic: ArCHR2 2-3
Ketone: RCOCHR2 2.1
Alkyne: RCCH

2.5
a to Nitrogen: R2CHNR2 2.5-3.0
Halide: R2CHX 3-4
a to Oxygen: R2CHOR 3-4
Vinyl: R2C=CHR 5-6
Benzyl: ArH 7-8
Aldehyde: RCHO 9-10
Carboxylic acid: RCO2H 10-12
Amines: R2NH

Variable: 1-4
Alcohols: ROH Variable: 2-5
Phenols: ArOH Variable: 4-7

13 C NMR Correlation Table:
Chemical Shifts of Selected Types of Carbon Atoms

Type of Carbon Approximate d Value
Alkane d 0 - 50
Alkyne d 70 - 90
Alkene d 100 - 150
Aromatic d 110 - 150
Nitrile d 115 - 125

Carbonyls:
Anhydride d 150 - 175
Ester d 160 - 175
Carboxylic acid d 165 - 180
Ketone or Aldehyde d 180 - 220

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