Question
Mass spectroscopy is also used to study large organic molecules. When a sample of a pure compound is analyzed in the instrument some of the molecules get ionized whole (molecular ions), while 80mc are fragmented and ionized. The fragmentation occurs in predictable patterns allowing scientists to propose chemical structures for unknown substances. Consider the mass spectrum of pentane (CH_3CH_2CH_2CH_2CH_3) shown below. Match the molecular ion and fragment ions below to each of the lettered peak clusters in the mass spectrum. CH_3CH_2CH_2CH_2CH_3^+ CH_3CH_2CH_2CH_2^+ CH_3CH_2CH_2^+ CH_3^+
Explanation / Answer
CH3CH2CH2CH2CH2+ (E)
CH3CH2CH2CH2+ (D)
CH3CH2CH2+ (C)
CH3CH2+ (B)
CH3+ (A)
explanation:
just very simple calculate molar mass of ion . it that is correseponding to mass peak
suppose CH3+ molar mass = 12 + 3 = 15 . it is A peak similarly for all peaks we have to do