Question

Why do organic compounds undergo halogenation much more often than inorganic compounds?

Answer 1

Are you sure that they do?

Explanation:

Organic compounds are generally rather inert. It is hard to manipulate an alkane, and often the first step is to introduce a halide by radical halogenation. On the other hand, inorganic compounds TEND to be a bit more reactive, and offer a greater range of oxidation states, which chemistry may allow direct halogenation (without all that tedious mucking about with UV light).