Give the ion that corresponds to a m/z ratio of 56 in a mass spectrum of 1-butanol.
E)none of the above

Question

Quizplus · Accepted Answer

The m/z ratio of 56 suggests a fragment that has lost a methyl group (CH3) from the molecular ion of 1-butanol. The molecular ion of 1-butanol has a mass of 74, so the fragment with m/z of 56 has a mass of 56-14 = 42, which corresponds to C4H9O. Among the given choices, only option C (11ea8a1c_2d16_606c_b657_bb8ddab887eb_TB1831_00) corresponds to a fragment with a molecular formula of C4H9O.

Give the Ion That Corresponds to a M/z Ratio of 56