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Chemistry A Molecular Approach
For the chlorination of propane, the two isomers shown here are possible. Propane has six hydrogen atoms on terminal carbon atoms-called primary $\left(1^{\circ}\right)$ hydrogen atoms-and two hydrogen atoms on the interior carbon atom-called secondary $\left(2^{\circ}\right)$ hydrogen atoms.
a. If the two different types of hydrogen atoms were equally reactive, what ratio of 1-chloropropane to 2-chloropropane would we expect as monochlorination products?
b. The result of a reaction yields 55$\% 2$-chloropropane and 45$\%$ 1-chloropropane. What can we conclude about the relative reactivity of the two different kinds of hydrogen atoms? Determine a ratio of the reactivity of one type of hydrogen atom to the other.