IR Spectra

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alkane

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Description and Tags

30 Terms

1

alkane

3000 - 2800 cm⁻¹

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2

methylene

~1450 cm⁻¹

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3

methyl

~1370 cm⁻¹

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4

isopropyl

approximately equal intensity doublet at ~1360 and ~1380 cm⁻¹

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5

t-butyl

unsymmetrical doublet at ~1360 and ~1390 cm⁻¹

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6

alkene

3100 - 3000 cm⁻¹
weak confirming peak at 1660 - 1600 cm⁻¹

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7

terminal alkyne

~3300 cm⁻¹
weak confirming peak at ~2150 cm⁻¹

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8

aromatic ring

just left of 3000 cm⁻¹
possible confirming peaks at ~1500 and ~1600 cm⁻¹

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9

O-H stretch

broad peak at 3600 - 3200 cm⁻¹

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10

C-O stretch

1250 - 1050 cm⁻¹

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11

1° alcohol

broad peak at 3600 - 3200 cm⁻¹
C-O peak at ~1050 cm⁻¹

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12

2° alcohol

broad peak at 3600 - 3200 cm⁻¹
C-O peak at ~1125 cm⁻¹

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13

3° alcohol

broad peak at 3600 - 3200 cm⁻¹
C-O peak at ~1200 cm⁻¹

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14

phenol

broad peak at 3600 - 3200 cm⁻¹
C-O peak at ~1500 and ~1600 cm⁻¹

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15

aliphatic ether

C-O peak at 1280 - 1200 cm⁻¹

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16

aryl ether

C-O peak at 1080 - 1020 cm⁻¹

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17

C=O stretch for ketones and aldehydes

1780 - 1660 cm⁻¹

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18

aldehyde

strong peak at 1780 - 1660 cm⁻¹
two weak peaks ~2820 and ~2700 cm⁻¹

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19

ketone

strong peak at 1780 - 1660 cm⁻¹

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20

C=O stretch for carboxylic acid derivatives

1840 - 1630 cm⁻¹

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21

acid chloride

peak at slightly higher frequencies than other CADs

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22

acid anhydride

two peaks at 1840 - 1740 cm⁻¹
C-O peak at ~1100 cm⁻¹

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23

aliphatic ester

peak at ~1740 cm⁻¹
C-O peak at 1300 - 1100 cm⁻¹

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24

aryl ester

peak at ~1720 cm⁻¹
C-O peak at 1300 - 1100 cm⁻¹

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25

amide

peak at 1690 - 1630 cm⁻¹
broad peak(s) at 3500 - 3300 cm⁻¹

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26

nitrile

moderate to weak peak at 2300 - 2200 cm⁻¹

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27

1° amine

two peaks at 3500 - 3300 cm⁻¹
weak C-N peak at 1350 - 1000 cm⁻¹

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28

2° amine

one peak at 3500 - 3300 cm⁻¹
weak C-N peak at 1350 - 1000 cm⁻¹

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29

3° amine

weak C-N peak at 1350 - 1000 cm⁻¹

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30

nitro

two strong peaks at 1600 - 1500 cm⁻¹ and 1390 - 1300 cm⁻¹

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