Hi Kyle!
It has taken some time, but I finally stumbled upon a situation where we would use the triple dot symbol you mention.
This chemistry textbook poses a hypothetical question where “[i]n another universe, elements try to achieve a nonet (nine valence electrons) instead of an octet when forming chemical bonds.” The question asks the student to provide two Lewis structures showing the compounds that would form when combining hydrogen and oxygen and hydrogen and fluorine. The answer is shown in the back of the book.
The attached Word document shows a screenshot of the print and a possible transcription of these structures.
Now to try to find the hyper elusive quadruple dot!
