It's bounced around a couple hosts over the years, and sadly this latest incarnation on science.org doesn't preserve the tags from the original.
Nevertheless, look up "Derek Lowe things I won't work with" for a great and hilarious series of posts on "fun" chemicals.
For example:
* Peroxide Peroxides:
https://www.science.org/content/blog-post/things-i-won-t-wor...
* Dioxygen Difluoride, or FOOF to its frenemies (let's put the two strongest oxidants together just for fun):
https://www.science.org/content/blog-post/things-i-won-t-wor...
* Triazadienyl Fluoride:
https://www.science.org/content/blog-post/things-i-won-t-wor...