Question

in mass spectra;alkanes give a series of peaks seperated by 14 mass units

Answer 1

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Answer 2

Hey dear,

● Explanation -
- Alkanes are hydrocarbons with general formula C(n)H(2n+2).
- Each subsequent alkane in series differs from its predecessor by methylene (-CH2-) group.
- Mass of methylene group
= 12 + 2×1 = 14 amu
- Therefore, when alkanes are fragmented in mass spectrometer, pattern shows series of peaks at 14 amu.

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