The chlorination of 2,2-dimethylpropane, C5H12\text{C}_5\text{H}_{12}C5H12, occurs via a free-radical substitution mechanism.
Which of the following equations could represent a propagation step in this reaction?
- C5H11∙+Cl2→C5H11Cl+Cl∙\text{C}_5\text{H}_{11}\bullet + \text{Cl}_2 \rightarrow \text{C}_5\text{H}_{11}\text{Cl} + \text{Cl}\bulletC5H11∙+Cl2→C5H11Cl+Cl∙
- C5H12+Cl∙→C5H11∙+HCl\text{C}_5\text{H}_{12} + \text{Cl}\bullet \rightarrow \text{C}_5\text{H}_{11}\bullet + \text{HCl}C5H12+Cl∙→C5H11∙+HCl
- C5H11∙+Cl∙→C5H11Cl\text{C}_5\text{H}_{11}\bullet + \text{Cl}\bullet \rightarrow \text{C}_5\text{H}_{11}\text{Cl}C5H11∙+Cl∙→C5H11Cl