Infrared Spectroscopy (HSC SSCE Chemistry): Flashcards

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Infrared Spectroscopy
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IR spectroscopy identifies

Chemical bonds or functional groups in a compound

Two types of molecular vibrations in IR

Stretching and bending

Diatomic molecules not detected by IR

O2\text{O}_2 and N2\text{N}_2

IR wavenumber range (cm−1\text{cm}^{-1})

4000 to 500 cm−1\text{cm}^{-1}

IR spectrum y-axis shows

Percentage transmittance

Fingerprint region range (cm−1\text{cm}^{-1})

1500-500 cm−1\text{cm}^{-1}

C—H\text{C—H} bond absorption range (cm−1\text{cm}^{-1})

2800-3000 cm−1\text{cm}^{-1}

Alcohol —OH\text{—OH} absorption range (cm−1\text{cm}^{-1})

3000-3500 cm−1\text{cm}^{-1}, broad & strong

C=O\text{C=O} carbonyl absorption (cm−1\text{cm}^{-1})

Around 1700 cm−1\text{cm}^{-1}

Carboxylic acid IR characteristics

Broad —OH\text{—OH} (~3000) + C=O\text{C=O} (~1700 cm−1\text{cm}^{-1})

Explore HSC SSCE Chemistry Revision Notes by Topics

Analysis of Inorganic Substances

Analysis of Organic Substances

Chemical Synthesis and Design

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Analysis of Inorganic Substances

Analysis of Organic Substances

Chemical Synthesis and Design

Explore HSC SSCE Chemistry Quizzes by Topics

Analysis of Inorganic Substances

Analysis of Organic Substances

Chemical Synthesis and Design

Explore HSC SSCE Chemistry Exam Questions by Topics

Analysis of Inorganic Substances

Analysis of Organic Substances

Chemical Synthesis and Design

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