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In the structure below, which is a quaternary alkyl carbon atom?

In the structure below, which is a quaternary alkyl carbon atom?

Organic Chemistry: A Guided Inquiry
Organic Chemistry: A Guided Inquiry
2nd Edition
ISBN:9780618974122
Author:Andrei Straumanis
Publisher:Andrei Straumanis
Chapter12: Chirality
Section: Chapter Questions
Problem 23CTQ
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### Question In the structure below, which is a quaternary alkyl carbon atom? ![Structure Image] #### Options: - a. - b. - c. - d. - e. ### Explanation The given structure is a chemical diagram featuring several connected carbon atoms and other functional groups. Five of these carbon atoms are labeled with the letters a, b, c, d, and e. The question asks to identify which carbon atom among these is a quaternary alkyl carbon atom. - **Quaternary Alkyl Carbon Atom**: A quaternary alkyl carbon atom is a carbon atom that is bonded to four other carbon atoms. Each labeled carbon in the structure is examined to discern which one fits the criteria of being a quaternary alkyl carbon atom. - **Label (a)**: This carbon appears to be part of a ring structure and is bonded to three carbon atoms and one hydrogen (not quaternary). - **Label (b)**: This carbon is bonded similarly to label a and is connected to only three other carbon atoms and one hydrogen. - **Label (c)**: This carbon connects four different carbon groups but lacks a complete set of bonds to carbon atoms. - **Label (d)**: This carbon is bonded to four other carbon atoms directly. Thus, it is the quaternary carbon atom. - **Label (e)**: This carbon, part of a benzene ring, lacks the potential to be quaternary. Therefore, the correct option is **d.**. This detailed explanation helps understand how to identify a quaternary alkyl carbon atom in the provided structure.
Transcribed Image Text:### Question In the structure below, which is a quaternary alkyl carbon atom? ![Structure Image] #### Options: - a. - b. - c. - d. - e. ### Explanation The given structure is a chemical diagram featuring several connected carbon atoms and other functional groups. Five of these carbon atoms are labeled with the letters a, b, c, d, and e. The question asks to identify which carbon atom among these is a quaternary alkyl carbon atom. - **Quaternary Alkyl Carbon Atom**: A quaternary alkyl carbon atom is a carbon atom that is bonded to four other carbon atoms. Each labeled carbon in the structure is examined to discern which one fits the criteria of being a quaternary alkyl carbon atom. - **Label (a)**: This carbon appears to be part of a ring structure and is bonded to three carbon atoms and one hydrogen (not quaternary). - **Label (b)**: This carbon is bonded similarly to label a and is connected to only three other carbon atoms and one hydrogen. - **Label (c)**: This carbon connects four different carbon groups but lacks a complete set of bonds to carbon atoms. - **Label (d)**: This carbon is bonded to four other carbon atoms directly. Thus, it is the quaternary carbon atom. - **Label (e)**: This carbon, part of a benzene ring, lacks the potential to be quaternary. Therefore, the correct option is **d.**. This detailed explanation helps understand how to identify a quaternary alkyl carbon atom in the provided structure.
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