Boffis
International Hazard
Posts: 1879
Registered: 1-5-2011
Member Is Offline
Mood: No Mood
|
|
Other metal analogs of sodium nitroprusside
The nitroprusside anion has iron at its core, it is pentacyanonitroferrate III - Fe(CN)5NO--
Do any other metals form similar cyanocomplexes contain the NO group? I did a search online and through my chemsitry books and found few examples
(actually only 1 reference to a manganese complex.
|
|
|
Bedlasky
International Hazard
Posts: 1243
Registered: 15-4-2019
Location: Period 5, group 6
Member Is Offline
Mood: Volatile
|
|
Hi.
I found some document which mentioned pentacyano-nitrosyl complexes of Cr, Mn, Fe and Co.
https://www.google.com/url?sa=t&source=web&rct=j&...
|
|
|
Boffis
International Hazard
Posts: 1879
Registered: 1-5-2011
Member Is Offline
Mood: No Mood
|
|
Well Bedlasky's refrence has lead me to a legion of such complexes, some sound very interesting with metal valencies of 0 or even -1!! Apart from the
once indicated by Bedlasky's ref there are also V, Ru and possibly Ni compounds too.
Many thanks Bedlasky!
By the way has anyone every tried preparing NO gas? It is usually prepared from dilute nitric acid and copper powder but it can also be prepared from
sodium nitrite and hydroxylamine hydrochloride; ferrous sulphate and sodium nitrite etc. But which is the cleanest and simplest? I did a search on SM
but references to nitric oxide are few.
[Edited on 3-4-2020 by Boffis]
|
|
|
mackolol
Hazard to Others
Posts: 459
Registered: 26-10-2017
Member Is Offline
Mood: Funky
|
|
Quote: Originally posted by Boffis  |
By the way has anyone every tried preparing NO gas? It is usually prepared from dilute nitric acid and copper powder but it can also be prepared from
sodium nitrite and hydroxylamine hydrochloride; ferrous sulphate and sodium nitrite etc.
[Edited on 3-4-2020 by Boffis] |
Reaction of sodium nitrite with hydroxylamine hydrochloride yields N2O gas in normal conditions.
|
|
|
Boffis
International Hazard
Posts: 1879
Registered: 1-5-2011
Member Is Offline
Mood: No Mood
|
|
Ah yes you are correct Mackolol. Its interesting that hydroxylamine is used as a proxy for NO when preparing nitrosylcyano complexes.
Looks like I will go for the ferrous sulphate - sodium nitrite route.
|
|
|
woelen
Super Administrator
Posts: 8027
Registered: 20-8-2005
Location: Netherlands
Member Is Offline
Mood: interested
|
|
I have good experience with NaNO2, FeSO4 and acid. You can use cheap technical grade FeSO4 for that purpose.
|
|
|
Boffis
International Hazard
Posts: 1879
Registered: 1-5-2011
Member Is Offline
Mood: No Mood
|
|
@ woelen, does NO react quickly with atmospheric oxygen? What I am interested in is whether I need to purge the equipment with an inert gas before
generating the gas?
|
|
|
dawt
Hazard to Self
Posts: 74
Registered: 9-5-2016
Location: EU
Member Is Offline
Mood: fluorescent
|
|
@Boffis: You'll definitively have to purge the air from your setup first. When generating NO from NaNO2 you can see a front of brown NO2 moving
through the apparatus until all the oxygen has been consumed.
|
|
|
Boffis
International Hazard
Posts: 1879
Registered: 1-5-2011
Member Is Offline
Mood: No Mood
|
|
Well I tracked down a number of preparations for pentacyanonitrosylmetallates including the nickel, cobalt, manganese, chromium and vanadium examples.
I also found a preparation for Dihydroxypentacyanonitrosylmolybdate ion too.
My first attempt was to prepare the potassium pentacyanonitrosylchromate I. This proved much easier than the hexacyanochromate III and it is much more
stable.
 Crude K3Cr(CN)5NO.H2O
 Recrystallised product
I will post the preparation detail later.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
