Questions: The base peak in the mass spectrum of an amine is often due to This cleavage yields a(n) ion. dehydration; resonance-stabilized a-cleavage; resonance-stabilized a-cleavage; radical dehydration; radical

The base peak in the mass spectrum of an amine is often due to This cleavage yields a(n) ion. dehydration; resonance-stabilized a-cleavage; resonance-stabilized a-cleavage; radical dehydration; radical
Transcript text: learning.mheducation.com CHM2030_ONLTFA_ONL7F_24 - Organic Chemistry if 10.1 Fundamentals of Hypothesis Testing | Howkes Learning | Portaf Mb Sraw Hili 14 of 22 Concepts completed Multiple Choice Question The base peak in the mass spectrum of an amine is often due to $\qquad$ This cleavage yields a(n) $\qquad$ ion. dehydration; resonance-stabilized a-cleavage; resonance-stabilized a-cleavage; radical dehydration; radical Need help? Review these concept resources. Read About the Concept
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Solution

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Solution Steps

Step 1: Understanding the Mass Spectrum of Amines

In mass spectrometry, the base peak is the most intense peak in the spectrum and represents the most stable ion formed during fragmentation. For amines, fragmentation often involves the cleavage of bonds adjacent to the nitrogen atom.

Step 2: Analyzing the Cleavage Process

Amines typically undergo a process known as \(\alpha\)-cleavage. This involves breaking the bond between the carbon atom adjacent to the nitrogen (\(\alpha\)-carbon) and the next carbon atom. This cleavage is common in amines due to the stability provided by the nitrogen atom.

Step 3: Identifying the Type of Ion Formed

The \(\alpha\)-cleavage in amines results in the formation of a resonance-stabilized ion. The nitrogen atom can donate a lone pair of electrons, stabilizing the resulting ion through resonance.

Final Answer

The base peak in the mass spectrum of an amine is often due to \(\alpha\)-cleavage. This cleavage yields a resonance-stabilized ion. Therefore, the answer is:

\[ \boxed{\text{a-cleavage; resonance-stabilized}} \]

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