FREE IGNOU BCHCT 131 SOLVED ASSIGNMENT 2023
Question 7: Write the assumptions of calculating the formal charge in a molecule. Calculate the formal charge in CH₃-C=O-CH₃.
The assumptions for calculating the formal charge are:
- All bonding electrons are equally shared between bonded atoms.
- Lone pair electrons are assigned to the atom they belong to.
- Each bond is equally divided between the bonded atoms.
For CH₃-C=O-CH₃:
- Formal charge on Carbon in CH₃: 4 – 0.5(4) – 0 = 0
- Formal charge on Carbon in C=O: 4 – 2 – 4 = -2
- Formal charge on Oxygen: 6 – 4 – 2 = 0
