Step 1: Understanding the Concept:
The question asks to identify the correct bond-line structural formula for the compound with the common name "Neopentane".
In bond-line notation, carbon atoms are represented by the intersections of lines and the ends of lines. Hydrogen atoms attached to carbons are implied. Step 2: Key Formula or Approach:
1. Determine the IUPAC name and connectivity of Neopentane based on its common prefix.
2. Translate that connectivity into a bond-line drawing.
3. Match the derived drawing with the given options. Step 3: Detailed Explanation:
The word "pentane" indicates an alkane with a total of 5 carbon atoms (formula \( \text{C}_5\text{H}_{12} \)).
There are three structural isomers of pentane:
1. n-pentane: A continuous straight chain. Its IUPAC name is pentane. In bond-line, it's a zig-zag with 4 segments (Option D).
2. Isopentane: A branched chain with a methyl group on the second carbon of a four-carbon chain. Its IUPAC name is 2-methylbutane. In bond-line, it looks like a 'Y' with an extended tail (Option A).
3. Neopentane: A highly branched isomer where a central carbon atom is bonded to four separate methyl groups. Its IUPAC name is 2,2-dimethylpropane. Its condensed formula is \( \text{C(CH}_3\text{)}_4 \).
To draw Neopentane in bond-line notation:
We need a central vertex (representing the central quaternary carbon).
From this central vertex, four lines must radiate outward (representing the bonds to the four terminal methyl carbons).
This forms a cross or "plus sign" (\( \text{X} \)) shape.
Looking at the options:
- Option A represents isopentane (2-methylbutane).
- Option B represents a 6-carbon molecule, 2,3-dimethylbutane.
- Option C represents neopentane, matching our derived cross shape.
- Option D represents n-pentane. Step 4: Final Answer:
The bond line formula of Neopentane is Option (C).
