Break down into molecular form.....?? Blackholes are composed of nothing more than information stating their mass, spin, and charge. At least that is what contemporary physics proposes. But the notion that blackholes can be broken down into molecules is most certainly absurd, and ions are simply the nuclei of atoms. Did I interpret your question incorrectly? If you're asking what is the smallest constituant of a blackhole I would answer with the term "singularity". This bears no resemblance to an atom or ion or especialy molecule for that matter, however, it may bear some resemblance to a particle.....This I could not confirm because I have never seen any informaion relating to the structure of singularities, or even if they have structure. It's just a somewhat educated guess on my part. Excluding the paradigms of string theory, I would conjecture that a singularity could possibly be some sort of exotic point particle that obeys the physics of "the other side of the universe" (the realm of the inner blackhole). Maybe it posseses tachyonic properties in imaginary dimensions. Now I'm not even answering your question anymore but rather mumbling to myself...but I'd hate to delete all that damn typing work! I hope I did answer you question in the first few sentences though......