IR Spectroscopy Functional Groups

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23 Terms

1
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IR Spectrum Range of Functional Group Bond:

alkane C-H (sp^3)

Shape? Intensity?

2850-3000 cm-1

Shape: often strong

<p>2850-3000 cm-1</p><p>Shape: often strong</p>
2
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IR Spectrum Range of Functional Group Bond:

1/2. Alkene C-H (sp^2)

Shape? Intensity?

3000-3100 cm-1

Shape: sharp

Intensity: medium

<p>3000-3100 cm-1</p><p>Shape: sharp</p><p>Intensity: medium</p>
3
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IR Spectrum Range of Functional Group Bond:

1/2. alkyne C-H (sp)

Shape? Intensity?

3300 cm-1

Shape: sharp

Intensity: medium

<p>3300 cm-1</p><p>Shape: sharp</p><p>Intensity: medium</p>
4
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IR Spectrum Range of Functional Group Bond:

2/2. Alkene C=C

Shape? Intensity?

1600-1650 cm-1

Shape: sharp

Intensity: medium

<p>1600-1650 cm-1</p><p>Shape: sharp</p><p>Intensity: medium</p>
5
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IR Spectrum Range of Functional Group Bond:

aromatic C=C

Shape? Intensity?

1475-1600 cm-1

Shape: sharp

Intensity: medium

<p>1475-1600 cm-1</p><p>Shape: sharp</p><p>Intensity: medium</p>
6
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IR Spectrum Range of Functional Group Bond:

2/2. alkyne C≡C

Shape? Intensity?

2100-2200 cm-1

Shape: sharp

Intensity: medium-weak

<p>2100-2200 cm-1</p><p>Shape: sharp</p><p>Intensity: medium-weak</p>
7
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IR Spectrum Range of Functional Group Bond:

Nitrile C≡N

Shape? Intensity?

2200-2300 cm-1

Shape: broad

Intensity: medium

<p>2200-2300 cm-1</p><p>Shape: broad</p><p>Intensity: medium</p>
8
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IR Spectrum Range of Functional Group Bond:

Alcohol O-H

Shape? Intensity?

3300 cm-1

Shape: broad, smooth

Intensity: strong

<p>3300 cm-1</p><p>Shape: broad, smooth</p><p>Intensity: strong</p>
9
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IR Spectrum Range of Functional Group Bond:

Amine N-H

Shape? Intensity?

3300 cm-1

Shape: medium

Intensity: broad

<p>3300 cm-1</p><p>Shape: medium</p><p>Intensity: broad</p>
10
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IR Spectrum Range of Functional Group Bond:

1/2. Ester C=O

Shape? Intensity?

1740 cm-1

Shape:

Intensity: strong

<p>1740 cm-1</p><p>Shape:</p><p>Intensity: strong</p>
11
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IR Spectrum Range of Functional Group Bond:

2/2. Ester C-O

Shape? Intensity?

1000-1300 cm-1

Shape: Often two bands

Intensity: strong

<p>1000-1300 cm-1</p><p>Shape: Often two bands</p><p>Intensity: strong</p>
12
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IR Spectrum Range of Functional Group Bond:

1/2. aldehyde C=O

Shape? Intensity?

1730 cm-1

Shape: strong

Intensity: -

<p>1730 cm-1</p><p>Shape: strong</p><p>Intensity: -</p>
13
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IR Spectrum Range of Functional Group Bond:

2/2. aldehyde H-CO

Shape? Intensity?

2700, 2800 cm-1

Shape: medium

Intensity: -

<p>2700, 2800 cm-1</p><p>Shape: medium</p><p>Intensity: -</p>
14
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IR Spectrum Range of Functional Group Bond:

ketone C=O

Shape? Intensity?

1720 cm-1

Shape: strong

Intensity: -

<p>1720 cm-1</p><p>Shape: strong</p><p>Intensity: -</p>
15
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IR Spectrum Range of Functional Group Bond:

1/2. carboxylic acid C=O

Shape? Intensity?

1710 cm-1

Shape: strong

Intensity: -

<p>1710 cm-1</p><p>Shape: strong</p><p>Intensity: -</p>
16
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IR Spectrum Range of Functional Group Bond:

2/2. carboxylic acid O-H

Shape? Intensity?

2500-3500 cm-1

Shape: jagged

Intensity: very broad

<p>2500-3500 cm-1</p><p>Shape: jagged</p><p>Intensity: very broad</p>
17
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IR Spectrum Range of Functional Group Bond:

1/2. amide C=O

Shape? Intensity?

1650 cm-1

Shape: broad

Intensity: strong

<p>1650 cm-1</p><p>Shape: broad</p><p>Intensity: strong</p>
18
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IR Spectrum Range of Functional Group Bond:

2/2. amide N-H

Shape? Intensity?

3300 cm-1

Shape: broad

Intensity: strong

<p>3300 cm-1</p><p>Shape: broad</p><p>Intensity: strong</p>
19
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IR Spectrum Range of Functional Group Bond:

1/2. alkyl halide C-Cl

Shape? Intensity?

600-800 cm-1

Shape: Strong

Intensity: Strong

20
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IR Spectrum Range of Functional Group Bond:

2/2. alkyl halide C-Br

Shape? Intensity?

500- 600 cm-1

Shape: Strong

Intensity: Strong

21
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Wavenumber

Bond strength

22
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Signal Intensity

number of bonds, bond polarity

23
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Signal Shape

Hydrogen Bonding