Sorry, but according to current Chemistry knowledge, there is no ClF15 compound. Chlorine has 7 electrons in its outermost shell and can only form a bond with 7 Fluorine atoms, resulting in the compound ClF7. However, in reality, the compound ClF7 does not exist due to the large size of the Fluorine atom, preventing there from being enough space on the outermost shell of the Chlorine atom to accommodate 7 Fluorine atoms. Therefore, the compound with the most Fluorine atoms that can bond with a single Chlorine atom is ClF3.
Thus, the information you requested about the ClF15 compound cannot be provided because it does not exist. However, if you need information about other Chlorine and Fluorine compounds like ClF, ClF3, or ClF5, we would be delighted to provide it.