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Infrared spectrometry, mass spectrometry and structure deduction · A Level Chemistry · Courselo

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Chemistry
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Analytical, practical and synoptic skills

Infrared spectrometry, mass spectrometry and structure deduction

Analytical, practical and synoptic skills · Lesson 2 of 8

Lesson 2 of 8

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Unit 8

Analytical, practical and synoptic skills

8 lessons · 13 h 15 min of study

Chromatography and separation techniques1 h 30 min of study
Infrared spectrometry, mass spectrometry and structure deductionReading · 0%
NMR spectroscopy for structure determination2 h 15 min of study
Volumetric analysis, calorimetry and standard laboratory methods2 h of study
Preparing, purifying and characterising products1 h 15 min of study

This unit is ≈16% of the Chemistry, across 8 lessons. Full syllabus

Lesson 2 of 8 · Analytical, practical and synoptic skills

Infrared spectrometry, mass spectrometry and structure deduction

3 quick checks≈3% of the testCore: Core: tested on most papers

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By the end you’ll be able to

Interpret infrared spectra using absorption data to identify characteristic bond vibrations and functional groups, including $\text{O–H}$, $\text{N–H}$, $\text{C=O}$, $\text{C–O}$ and unsaturated bonds where specified.
Explain how infrared spectroscopy can be used to confirm the presence or absence of functional groups and distinguish between possible structures.

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Adaptive questions on infrared spectrometry, mass spectrometry and structure deduction.

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Processing data, uncertainty and graphical analysis1 h 15 min of study

Planning investigations, evaluation and synoptic comprehension1 h 45 min of study

Qualitative organic analysis1 h 15 min of study

Interpret mass spectra in terms of the molecular ion, fragment ions and relative abundance, and use $m/z$ data to deduce molecular mass and likely fragments.

Use high-resolution or accurate-mass data, where specified, to determine molecular formula from exact masses or from a molecular ion together with isotopic information.

Interpret isotopic patterns in mass spectra, including characteristic halogen patterns, to infer the presence of elements such as chlorine and bromine.

Deduce and justify the structure of an unknown compound by combining molecular formula, infrared data, mass-spectral fragmentation and relevant chemical evidence.

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PreviousChromatography and separation techniques Next lessonNMR spectroscopy for structure determination