Advanced Organic Chemistry: Mass spectrum of octane
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The mass spectrum of octane
Doc Brown's Chemistry Advanced Level Pre-University Chemistry Revision Study Notes for UK IB KS5 A/AS GCE advanced A level organic chemistry students US K12 grade 11 grade 12 organic chemistry courses involving molecular spectroscopy analysing mass spectra of octane
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Octane, C8H18, CH3(CH2)6CH3, CH3-CH2-CH2-CH2-CH2-CH2-CH2-CH3,
Interpreting the fragmentation pattern of the mass spectrum of octane
[M]+ is the molecular ion peak (M) with an m/z of 114 corresponding to [C6H13]+, the original octane molecule minus an electron, [CH3(CH2)6CH3]+.
The tiny M+1 peak at m/z 115, corresponds to an ionised octane molecule with one 13C atom in it i.e. an ionised octane molecule of formula 13C12C6H18
Identifying the species giving the most prominent peaks (apart from M) in the fragmentation pattern of octane.
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