Question

Given the following mass spectra of isopentyl acetate below, provide the structures of the mass fragments corresponding to m/z = 43, 55, 70, and 115.

(DCM signals are at 40, 49, and 84)

Abundance 9000 3000 7000 6000 5000 4000 3000 2000 1000 40.1 40 441 57.2 70.2 77.2 84.0 103.2 91.0 96.0 100 115.1 110 120 126

Answer 1

m/z 43, 55, 70, and 115 Chemical Formula: C7H1402 Molecular Weight: 130.19 Chemical Formula: C2H30 Exact Mass: 43.02 Chemical Formula: C4H7 Molecular Weight: 55.10 Chemical Formula: CsH10 Molecular Weight: 70.14 Chemical Formula: CaH102 Molecular Weight: 115.15