`CH_(3)-overset(CH_(3))overset("| ")"CH"-underset(O)underset(|)C-O-overset(CH_(3))overset("| ")underset(CH_(3))underset("| ")"C "-CH_(3)` The common name of given ester is -

Options

A. neo butyl iso butyrate
B. t - butyl n - butyrate
C. t - butyl iso butyrate
D. iso butyl iso butyrate

Answer

To determine the common name of the given ester, we will follow these steps:

### Step 1: Identify the Structure
The given structure is CH₃-CH(CH₃)-C(=O)-O-CH(CH₃)-CH₃. We need to identify the groups attached to the ester functional group.

### Step 2: Identify the Alkyl Groups
1. **Left Side Group**: The left side of the ester is CH₃-CH(CH₃)-C(=O). This group has four carbon atoms, and the central carbon is bonded to three other carbon atoms, making it a tertiary carbon. Therefore, this group is named **tertiary butyl**.

2. **Right Side Group**: The right side of the ester is O-CH(CH₃)-CH₃. This group also has four carbon atoms, but the structure indicates that it is an isomer of butyl. Since it has a branching at the second carbon, this group is named **isobutyl**.

### Step 3: Combine the Names
Now that we have identified the two alkyl groups, we can combine their names to form the common name of the ester. The common naming convention for esters is to name the alkyl group from the alcohol first, followed by the alkyl group from the acid, and then add the suffix "ate".

Thus, the common name for this ester is **tertiary butyl isobutyrate**.

### Final Answer
The common name of the given ester is **tertiary butyl isobutyrate**.

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