opsin icon indicating copy to clipboard operation
opsin copied to clipboard
Published 1 month ago • verified publisher icon dan2097

Potassium Osmate

Open paconius opened this issue 4 years ago • 2 comments

Here is another interesting one: potassium osmate: https://en.wikipedia.org/wiki/Potassium_osmate

AFAIK, the IUPAC name for this compound is: Dipotassium tetrahydroxy(dioxido)osmium

OPSIN seems to recognize this name, but produces a strange output containing two potassium radicals.

paconius avatar Feb 24 '21 02:02 paconius

Ah ha! It looks like OPSIN accepts the following as the name for potassium osmate: dipotassium dioxidodioxoosmium dihydrate

Roundtripping that name through ChemAxon gives this IUPAC name: dipotassium dioxoosmiumbis(olate) dihydrate

At this point I've very confused and don't know how to lean.

paconius avatar Feb 24 '21 02:02 paconius

Thanks, OPSIN's handling of Dipotassium tetrahydroxy(dioxido)osmium is wrong, I'll look into it. Oxido is normally -[O-], although empricially in some names it was used instead of =O (Oxo). Given the presence of a suitable cation, it should definitely be interpreted as -[O-] in this name.

Supporting names like potassium osmate is a bit tricky as while postassium osmate is a definite structure, and has an oxidation state VI, I think "osmate" on its own has some ambiguity and perhaps is more typically in oxidation state IV

dan2097 avatar Feb 26 '21 22:02 dan2097