When 2,2-dimethylbutane is heated with chlorine, it undergoes free radical substitution. In one propagation step, the free radical $X\cdot$ is produced. $\text{CH}_3\text{CH}_2\!\!\begin{matrix} \\ | \end{matrix}C\!\!\begin{matrix} \\ | \end{matrix}\text{CH}_3 + \text{Cl}\cdot \rightarrow X\cdot + \text{HCl}$ How many different forms of $X\cdot$ can be formed?
- A1
- B2
- C3
- D4