# What is the name of the chemical compound: Cr(CO3)3?

## Cr(CO${_3}$)${}_3$

This is an ionic compound. Chromium is a transition metal cation and CO${_3}$ is an anion with a charge of 2-, as said in my chemistry textbook.

And since CO${_3}$ has a charge of 2-, the over all charge of CO${_3}$ would be 6-, since it has a subscript of 3 in the bolded formula above. So my guess is that since Chromium has no such subscript, its charge would automatically be 6-, which should be right because it would cancel out both charges.

Therefore it would be Chromium (VI) Carbonate? Please correct me if I am wrong.

• Fairly sure this thing doesn't exist to begin with - it would immediately decompose to $\ce{CrO3 + 3CO2}$. – orthocresol Nov 28 '16 at 23:10
• Scifinder agrees with @ortho. The only compound with the molecular formula $\ce{C3CrO9}$ to be found is tricarbonatochromate(III). – Jan Nov 28 '16 at 23:40
• I'm quite sure you have a typo there and if it's not supposed to be 'am I right" question, you should take this to mind - it may be CrCO3 but not this. even if compound with your formula existed it wouldn't be ionic, but covalent. – Mithoron Nov 28 '16 at 23:56
• Honestly I think even the Cr(III) compound $\ce{Cr2(CO3)3}$ doesn't exist. The aluminium and iron(III) carbonates certainly don't. With that said I'd presume this is just a nomenclature exercise and the question setter just didn't bother thinking twice about whether the compound was realistic or not. – orthocresol Nov 29 '16 at 0:05
• @orthocresol Well, at least chromium(III) carbonate seems to exist. – Jan Nov 29 '16 at 14:25