Chapter 17
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Why does the m+ 1 peak exist
1.1% of carbon is present as carbon 13 isotope
What is fragmentation
When some molecular ions break down into smaller pieces Use the fragments to identify the compound
What is infrared spectroscopy used for
To identify the functional groups present in organic molecules
How does spectroscopy work
Beam or if radiation is passed through Some of the radiation is absorbed Plots a graph of transmittance against wavenumber
Ir spectrum of alcohols
Smooth skinny curve 3200 - 3600
Ir carboxylic acids
Broad peak 3000
Phrasing of infra red
Peak within range 1630-1830 caused by c=O bond And a broad beak within range 2500-3000 caused by an OH group in a carboxylic acid
iR uses
Analyse vehicle emissions to detect and measure carbon dioxide Used in breathalysers to detect compounds in breath
Methods of processing waste polymers
Recycling Cracking Organic feedstock Combustion for energy Production of plastic /chemicals