IR spectroscopy

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20 Terms

1
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Double bond region 

1850-1630

<p><span>1850-1630</span></p>
2
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aldehyde

two weak bands 2900-2700 cm-1

<p><span>two weak bands 2900-2700 </span>cm<sup>-1</sup> </p>
3
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carboxylic acid

very broad band, 3100-2600 cm-1 AND double bond band ~1700 cm-1

<p>very broad band, 3100-2600 cm<sup>-1 </sup>AND double bond band ~1700 cm<sup>-1</sup></p>
4
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ester

two bands, usually strong, 1000-1300 cm-1

<p>two bands, usually strong, 1000-1300 cm-1</p>
5
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OH NH region

4000-2500 cm-1

<p>4000-2500 cm<sup>-1</sup></p>
6
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Alcohol 

Strong broad band present in 3600-3000 cm-1 region

<p>Strong broad band present in 3600-3000 cm<sup>-1</sup> region</p>
7
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Primary Amine

Double medium bands present in 3300-3500 cm-1 region

<p>Double medium bands present in 3300-3500 cm<sup>-1</sup> region</p>
8
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Ketone

one band ~1700 cm-1, nothing in OH NH range

<p>one band ~1700 cm<sup>-1</sup>, nothing in OH NH range</p>
9
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CH region

2850-3000 cm

<p>2850-3000 cm</p>
10
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Secondary Amine

Single medium band present in 3300-3500 cm-1 region

<p>Single medium band present in 3300-3500 cm<sup>-1</sup> region</p>
11
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Terminal Alkyne

~3300 cm-1, sp region, sharp (might see peak ~2200 cm-1 also)

<p>~3300 cm-1, sp region, sharp (might see peak ~2200 cm-1 also)</p>
12
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Terminal Alkene

3000-3100 cm-1,sp2 region, sharp

<p>3000-3100 cm<sup>-1</sup>,sp<sup>2</sup> region, sharp </p>
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alkane/sp3 CH

2950-2850 cm-1

<p>2950-2850 cm-1</p>
14
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triple bond region

2000-2500 cm-1

<p>2000-2500 cm-<sup>1</sup></p>
15
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Nitrile

Strong band 2280-2100 cm-1

<p>Strong band&nbsp;2280-2100 cm-<sup>1</sup></p>
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internal Alkyne 

weak band 2250-2100 cm-1 (weaker than terminal)

<p>weak band 2250-2100 cm-<sup>1</sup> (weaker than terminal)</p>
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Ether

C-O single bonds (1250-1050 cm-1)

<p>C-O single bonds (1250-1050 cm<sup>-1</sup>)</p>
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NH2 bend

~1650 cm-1

<p>~1650 cm<sup>-1</sup></p>
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CO double bond

narrow band 1800-1650cm-1

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internal Alkene CC

Medium band ~1650-1550 CC bond