What is the IUPAC name of Mesityl Oxide ?A 4-Methyl pent-3-en-2-one B But-2-en-1-al C 4-methyl pent-3-en-1-al D 1,3,5 trimethyl benzene

Break Down the Problem

1. Identify the structure of Mesityl Oxide.
2. Analyze the options to find the correct IUPAC name.

Relevant Concepts

• Mesityl Oxide is an organic compound with a specific chemical structure that includes a ketone functional group and methyl substitutions.

Analysis and Detail

1. Structure of Mesityl Oxide: The molecular formula of Mesityl Oxide is $C_6H_{10}O$. The structure can be represented as follows:

   • It consists of a pentene framework with a ketone (-C=O) functionality at the 2nd position and one methyl group at the 4th position.

2. Identifying Each Option:

   • Option A: 4-Methyl pent-3-en-2-one
     • This name corresponds to the structure of mesityl oxide.
   • Option B: But-2-en-1-al
     • This structure does not match; it indicates an aldehyde rather than a ketone.
   • Option C: 4-methyl pent-3-en-1-al
     • This indicates an aldehyde, incorrect for the ketone at position 2.
   • Option D: 1,3,5-trimethyl benzene
     • This corresponds to a completely different structure, a substituted aromatic compound.

Verify and Summarize

Option A correctly describes the structure of Mesityl Oxide as it confirms the presence of a ketone at the right position along with the methyl substituent. The other choices either misrepresent the functional group or refer to different structures altogether.

Final Answer

The IUPAC name of Mesityl Oxide is A. 4-Methyl pent-3-en-2-one.