Which of the following statements correctly describes the Lewis dot structure of 1,2-dichloropropane (C3H6Cl2)?

• A. Both chlorine atoms are bonded to the same carbon atom.
• B. There is a carbon-carbon triple bond present in the structure.
• C. Each carbon atom forms four single bonds, and each chlorine atom is bonded to a different carbon atom.
• D. The central carbon atom forms a double bond with one of the chlorine atoms.

Answer: (C)

Verified step by step guidance

1. Identify the molecular formula and structure of 1,2-dichloropropane, which is C3H6Cl2, indicating a propane backbone (3 carbon atoms) with two chlorine atoms attached at positions 1 and 2.
2. Recall that in organic molecules, carbon typically forms four single covalent bonds to satisfy the octet rule, and chlorine typically forms one single bond with a carbon atom and has three lone pairs.
3. Analyze the given options: a) Both chlorines bonded to the same carbon would mean both substituents are on one carbon, which contradicts the '1,2-' prefix indicating chlorines on different carbons; b) A carbon-carbon triple bond is unlikely in a propane derivative and would change the formula and bonding significantly; c) Each carbon forms four single bonds, and each chlorine is bonded to a different carbon atom aligns with the 1,2-substitution pattern; d) A double bond between carbon and chlorine is uncommon and not typical for such compounds.
4. Conclude that the correct Lewis structure shows each carbon atom forming four single bonds (either to carbon, hydrogen, or chlorine), and each chlorine atom bonded to a different carbon atom, consistent with the 1,2-dichloropropane name.
5. To draw the Lewis structure, start with the three carbon atoms connected in a chain with single bonds, attach chlorine atoms to the first and second carbons respectively, and fill remaining valences with hydrogen atoms to satisfy the tetravalency of carbon.