Question

Predict the masses and the structures of the most abundant fragments observed in the mass spectra of the following compounds

a. 2-methylpentane

b. 3-methylhex-2-ene

c. 4-methylpentane-2-ol

d. 2-methyl-1-phenylpropane

e. Cyclohexylisopropy; ether [cyclohexyl--O-CH(CH₃)₂ ]

f. CH₃CH₂CH₂NHC(CH₃)₂

_g.

h.3-bromo-2-methylpentane

Short answer

Answer

The most abundant peaks for all the given species and their formation through fragmentation is shown.

Step-by-step solution

Introduction

Molecular mass of a compound is given $\frac{m}{z}$ (mass to charge) value of the molecular ion in the mass spectrum.

$M+e^{-}\to M^{+}+2e^{-}$

 Step 2: Explanation and answer of the given subparts

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)