Photochemical chlorination of 2,2,4-trimethylpentane gives four isomeric monochlorides. (a) Write structural formulas for these four isomers. (b)

Question:

Photochemical chlorination of 2,2,4-trimethylpentane gives four isomeric monochlorides.
(a) Write structural formulas for these four isomers.
(b) The two primary chlorides make up 65% of the monochloride fraction. Assuming that all the primary hydrogens in 2,2,4-trimethylpentane are equally reactive, estimate the percentage of each of the two primary chlorides in the product mixture.