Advanced Organic Chemistry: Mass spectrum of 2-methylbut-1-ene
The mass spectrum of 2-methylbut-1-ene
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 2-methylbut-1-ene
2-methylbut-1-ene C5H10, ,
Interpreting the fragmentation pattern of the mass spectrum of 2-methylbut-1-ene
[M]+ is the molecular ion peak (M) with an m/z of 70 corresponding to [C5H10]+, the original 2-methylbut-1-ene molecule minus an electron, [H2C=C(CH3)CH2CH3]+.
The small M+1 peak at m/z 71, corresponds to an ionised 2-methylbut-1-ene molecule with one 13C atom in it i.e. an ionised 2-methylbut-1-ene molecule of formula 13C12C4H10
Identifying the species giving the most prominent peaks (apart from M) in the fragmentation pattern of 2-methylbut-1-ene.
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