Benzene must've been examined down to the nth degree in quantum analysis. Maybe there's an article ?

Lots of them.

I wrote 6 on my way to my Ph.D. in the late 1990s, and there was plenty of prior art at that time.

Here's one of mine, see references therein as well: https://pubs.aip.org/aip/jcp/article-abstract/110/7/3326/475...