C triple bond C

IR under 3000 cm-1

IR above 3000 cm-1

IR sharp at 3300 cm-1

C-C

C=C

C trip C

IR 3300 cm-1, broad

IR 3000 cm-1, broad

IR 3300 cm-1, broad with spikes

alcohol O-H

acid O-H

amine N-H (spikes go with how many H's there are)

IR 1710 cm-1

IR 1725 cm-1, 2700 and 2800

1735 cm-1

Ketone

Aldehyde

Esters

Mass Spec Fragmentation of parent peak:

3:1 M:M+2

1:1 M:M+2

9:6:1 M:M+2:M+4

1:2:1 M:M+2:M+4

3:4:1 "  "

Cl³⁵ Cl³⁷

Br⁷⁹ Br⁸¹

2 Cl

2 Br

BrCl

13-C NMR Peaks

200 ppm

100-150 ppm

80-100 

C=O aldehyde or ketone

C=C 

C trip C

Mass Spec:

m/z 77

m/z 91

m/z 105

benzene cation

benzyl methane cation

benzyl carbonyl cation

NMR Chemical Shifts

1.7

2.1

2.3

3.4

4

5-6

7-8

9-10

10-12

1.5-4 

Allylic

ketone

Ph-CH3

R-CH2-OR

CH3-COO-R

Vinyllic

Phenyl

Aldehyde

Carboxylic Acid

Amide