Answer to Question #85842 in Organic Chemistry for anuj

Question #85842
In the mass spectra, alkanes give a series of peaks separated by 14 mass units
1
Expert's answer
2019-03-12T08:43:30-0400

Alkanes undego fragmentation process in mass spectrometer.

Every alkane differs from subsequent alkane by CH2 group. When fragmentation takes place the molecule of alkane becomes shorter as it losses CH2 group which has mass of 14 u. Concequently, the peaks corresponding to every fragment of alkane molecule are separated by 14 mass units.


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