Which of the following names are not correct for the given compound :
`underset(CHO)underset(|)(CH_(2))-underset(CHO)underset(|)(CH)-underset(CHO)underset(|)(CH_(2))`

Options

A. 3-Formyl pentane-1,5-dial
B. 1,2,3-Triformylpropane
C. 2-Formylbutane-1,4-dial
D. Propane-1,2,3-tricarbaldehyde

Answer

To determine which names are not correct for the given compound, we will analyze each proposed name based on IUPAC nomenclature rules.

### Step-by-Step Solution:

1. **Identify the Structure**: The compound has multiple aldehyde (CHO) functional groups and a carbon chain. The structure can be visualized as having a central chain with aldehyde groups attached.

2. **Determine the Longest Carbon Chain**: The longest continuous carbon chain that includes all functional groups is essential for naming. In this case, the longest chain consists of 5 carbons.

3. **Identify Functional Groups**: The compound has three aldehyde groups. According to IUPAC rules, aldehyde groups are indicated by the suffix "-al" or the prefix "formyl" when they are substituents.

4. **Naming the Compound**:
- The correct name should reflect the longest chain and the position of the functional groups.
- The longest chain is pentane (5 carbons), and since there are three aldehyde groups, the correct name should be "1,2,3-tricarbaldehyde" or "3-formylpentane-1,5-dial".

5. **Evaluate Each Proposed Name**:
- **Option A: 3-formylpentane-1,5-dial**: This name is correct as it includes the longest chain and positions of the aldehyde groups.
- **Option B: 1,2,3-triformylpropane**: This name is incorrect because it suggests a 3-carbon chain (propane) while the longest chain is 5 carbons. It should be "tricarbaldehyde" instead of "triformyl".
- **Option C: 2-formylbutane-1,4-dial**: This name is incorrect because it implies a 4-carbon chain (butane) instead of the correct 5-carbon chain. It should be "pentane" instead of "butane".
- **Option D: Propane-1,2,3-tricarbaldehyde**: This name is also incorrect for the same reason as option B; it should refer to the 5-carbon chain.

6. **Conclusion**: The names that are not correct for the compound are **Option B (1,2,3-triformylpropane)** and **Option C (2-formylbutane-1,4-dial)**.

### Final Answer:
The incorrect names for the compound are **Option B and Option C**.