Sciencemadness Discussion Board - Sodium orthoargentite. Green compound

Sodium orthoargentite. Green compound

vano - 10-1-2021 at 13:15

It's very strange to me that sodium orthoargentite has a light green color. It is very easy to make.
Ag2O + 3Na2O = 2Na3AgO2

Unfortunately, I do not have time to do it. Also i do not have sodium oxide and I will have to get it from sodium azide.

I think it is worth. Even because of the color. It is a rare compound. The reaction is carried out in a vacuum.

vano - 10-1-2021 at 13:20

Source:

Bedlasky - 10-1-2021 at 16:07

Sometimes these orthosalts have quite different colours than their meta analogues. Look at perrhenates: metaperhenates ReO4- are colourless, orthoperrhenates (ReO5)3- are yellow if I remember it right.

vano - 11-1-2021 at 01:56

you are right. Yellow is even more understandable when we talk about rhenium. But the green color from such metals?

Bedlasky - 11-1-2021 at 08:59

Why not? Silver is also transition metal.

vano - 11-1-2021 at 09:06

Quote: Originally posted by Bedlasky

Why not? Silver is also transition metal.

Yes I know, but I think green is unusual.

DraconicAcid - 11-1-2021 at 09:09

Quote: Originally posted by Bedlasky

Why not? Silver is also transition metal.

Because it's a d10 system, and is expected to be colourless in the absence of charge-transfer bands (which you normally only get with higher oxidation states or easily reduced ions).

Bedlasky - 11-1-2021 at 12:56

Sorry, I didn't realized that.

Quote: Originally posted by DraconicAcid

Quote: Originally posted by Bedlasky

Why not? Silver is also transition metal.

Because it's a d10 system, and is expected to be colourless in the absence of charge-transfer bands (which you normally only get with higher oxidation states or easily reduced ions).