A carbanion is an organic ion where a carbon atom carries a negative charge. A carbocation is an organic ion where a carbon atom carries a positive charge. When aqueous sodium hydroxide reacts with 1-bromobutane, the reaction follows an $\text{S}_\text{N}2$ mechanism. What would be the correct description of the first step in this mechanism?
- Aattack by a nucleophile on a carbon atom with a partial positive charge
- Bheterolytic bond fission followed by an attack by an electrophile on a carbanion
- Cheterolytic bond fission followed by an attack by a nucleophile on a carbocation
- Dhomolytic bond fission followed by an attack by a nucleophile on a carbocation