EverythingAl2O3
Hazard to Self
Posts: 51
Registered: 3-9-2019
Member Is Offline
|
|
H2S reduction of ketones and aldehydes
I found an interesting reduction reaction using H2S/H2S sources like Na2S. It is a photocatalytic reaction using a 5.5W low pressure mercury lamp and
converts vicinal diols to ketones and ketones to alcohols at differing pHs.
One interesting thing stated in the procedure was saturating the solution with N2 gas. I have never seen a paper list saturating a solution with N2
only generating an N2 atmosphere.
Attachment: H2S reduction of ketones.pdf (885kB)
This file has been downloaded 365 times
|
|
|
symboom
International Hazard
Posts: 1143
Registered: 11-11-2010
Location: Wrongplanet
Member Is Offline
Mood: Doing science while it is still legal since 2010
|
|
Perfect timing just watched a video about making a hydrogen sulfide generator with candles and sulfur https://youtu.be/1hfC_ggJEhs
[Edited on 17-6-2021 by symboom]
|
|
|
EverythingAl2O3
Hazard to Self
Posts: 51
Registered: 3-9-2019
Member Is Offline
|
|
Yes I saw the same video and about 30 seconds in when he said "H2S is a reducing gas." I went "OMG HE'S RIGHT!!! How did I miss something so obvious?"
and started searching for carbonyl reduction reactions.
[Edited on 17-6-2021 by EverythingAl2O3]
|
|
|
Swinfi2
Hazard to Others
Posts: 131
Registered: 19-2-2018
Location: England
Member Is Offline
Mood: Catalytic
|
|
It's super easy to make H2S but god damn it stinks if you don't deal with it well. I went the paraffin + sulphur and heat route. Would not recommend.
1/10. It works but I'll be doing a different route next time I need H2S.
|
|
|
EverythingAl2O3
Hazard to Self
Posts: 51
Registered: 3-9-2019
Member Is Offline
|
|
| Quote: |
It's super easy to make H2S but god damn it stinks if you don't deal with it well. I went the paraffin + sulphur and heat route. Would not recommend.
1/10. It works but I'll be doing a different route next time I need H2S.
|
The paper listed Na2S as the source of H2S so maybe buying photography Na2S might be the way to go with this reduction reaction.
|
|
|
DraconicAcid
International Hazard
Posts: 4357
Registered: 1-2-2013
Location: The tiniest college campus ever....
Member Is Offline
Mood: Semi-victorious.
|
|
I've also seen old references to using H2S as a way to reduce nitro groups to amines. It strikes me as too much mucking around.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
