Consider this step in a radical reaction: $\mathrm{Cl}\cdot$ + ${\mathrm{CH}}_4$ → ${\mathrm{CH}}_3\cdot$ + ${\mathrm{HCl}}_{\mathrm{}}$. What type of step is this in the radical chain mechanism?

Show how you would synthesize each compound, starting with alkenes or cycloalkenes that contain no more than six carbon atoms. You may use any additional reagents you need.

(a)

In the following molecule, which of the labeled hydrogens ($A$, $B$, $C$, or $D$) is most easily abstracted in a free radical bromination reaction? (Assume the hydrogens are: $A$ = methyl hydrogen, $B$ = primary hydrogen, $C$ = secondary hydrogen, $D$ = tertiary hydrogen.)

In the radical bromination of $2_{\text{-methylbutane}}$, which hydrogen atom is most likely to be abstracted by a bromine radical?

When the compound $C_6{H}_5\mathrm{CH}{2}_2\mathrm{CH}{3}_3$ (ethylbenzene) is treated with n-bromosuccinimide (NBS) in the presence of light, which of the following is the major product?

Using the given starting material and any necessary organic or inorganic reagents, indicate how the desired compounds could be synthesized:

c.

Using the given starting material and any necessary organic or inorganic reagents, indicate how the desired compounds could be synthesized:

a.

Starting with cyclohexane, how could the following compounds be prepared?

c.

Starting with cyclohexane, how could the following compounds be prepared?

b.