I anticipate several classes of nomenclature questions may be posed, some of which may not be suitable for the site. I have listed them with my thoughts interposed.
Simple 'name this molecule' type questions
I do not think these questions should be allowed on the basis that they, in effect, fall prey of the 'too localised' rule popular elsewhere on SE. Without a name to even describe the species, such questions may also have extremely vague or even identical titles that are not amenable to identification from the main listing and are impossible to search for.
'Draw this molecule' type questions
Similar to the previous category, these questions benefit from having a searchable name but may evince a lack of research effort depending on the species, and may also fall into the 'too localised' bucket. Questions on the correct structure of a species, when searches return conflicting results (paclitaxel is a good example) may be permissible.
What are the nomenclature rules for [class of molecule]?
These should be permissible, but may evince a lack of research effort in some instances.
What is the correct usage of [nomenclature notation]?
Distinct from the above, this class of questions is more general and would cover questions like 'how do I use κ notation?', which are less likely to be too localised.