Stephen Reaction Class 12 Chemistry 🔥 | Stephen Reduction | Organic Chemistry Name Reaction

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Nov 4, 2026
@a2zpractical991
🔥 Stephen Reaction | Class 12 Chemistry | Organic Chemistry
In this video, we will learn Stephen Reaction (Stephen Reduction) in a very easy and interesting way.
📚 Topics Covered:
What is Stephen Reaction?
Stephen Reduction Reaction
Preparation of Aldehydes from Nitriles
Important reagents and conditions
Reaction mechanism
Important points for HSC Board Examination
🎯 Useful for:
Class 12 Chemistry
Maharashtra State Board HSC
Organic Chemistry
Board Exam Preparation
Name Reactions Revision
📌 Learn Chemistry with easy explanations and memory tricks.
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So, kids, today we're going to watch some Steffan reactions.
Stevens reaction aldehyde ketone and carboxylic
One of the most important topics in acids is
It happens that children come here today, first of all, we have Steven.
Children learn about Steffin
There's a reaction, isn't there, where you have the nitrile or the one
Cyanide is converted into aldehydes, isn't it?
One thing remember very clearly: what is yours
there is a cyanide group, from which you obtain aldehydes
Stefan has elicited exactly this reaction.
Alright
Let's take a look at some theoretical data regarding children who exhibit Steffin reaction.
It happens that after using tin chloride and other substances
I subject it to acid hydrolysis, which causes our
Cyanide gets converted into aldehydes in the presence of certain enzymes and under specific biochemical conditions, particularly in metabolic pathways involving nitrile metabolism.
But you probably don't understand here, come over here, let me explain it to you in the way I see it
I'll explain it—it's very tricky, but you'll totally get it. Come here, kid. Okay, now come on.
Go and see the child who is your Steffin; first of all, he is a Russian scientist.
Now, in the Steffan reaction, S stands for tin.
So, what will you use here, tin chloride?
And with tin chloride, you will use HCl.
Are you going to use tin chloride together with HCl? Now that I've heard it, tell me.
Child, when you're in any reaction, you use reducing agents.
You'll know, no matter which metal you use
There is a vast difference between heaven and earth in this hydrogen, and in this hydrogen.
This is diatomic and very stable; this is nascent hydrogen.
He's all alone, poor fellow, it's fine as long as he's in search of someone.
So this nascent hydrogen is in stannous chloride
It is found in Stephen chlorides.
Give it now, what happens to the child as soon as hydrogen comes here
But when it comes, it breaks the bond and breaks the bond.
If you do it, we'll get something like that product first.
RC double bond N. As soon as the bond breaks, this will
Put an H here, put an H here
Here you go, H brother, it's fine. Both Hs are coming forward here.
The substitute would be with him, what was there, the child was acyl, so
Look here, nitrogen will be having a lone pair.
The electron will keep the acyl group with it because
Because H plus emerges as a proton, which is
There is a deficiency of electrons here, therefore it is nitrogen
He'll walk closely beside me, saying, "Brother, take me along."
The electron will keep coming, that's fine. Up to here is your part.
Action has been taken, and in the final step, you don't need to do anything.
It needs to be subjected to acid hydrolysis, that is, hydronium ion
Astrid Plus is fine as is
Be careful when performing acid hydrolysis on this, just as you would when carrying out acid hydrolysis on it.
Then this oxygen flows out through this double one.
Look, Bond is here, and this whole group will leave from here—see what happens.
RC is a carbon with a double bond next to another carbon.
The oxygen got connected there.
You've become an aldehyde, haven't you? Have you become an aldehyde?
That's right, that's what happens in the Stephen reaction.
You'll say, sir, what happened to this? The child says this is NH4, meaning
2H is here from here and up to 2H is here, so this is NH4.
When you exit into Cl, what happens to you in NH4Cl?
Is it coming out here, then what can you see right here?
What has your cyanide group been converted into?
converted into aldehydes, converted into what?
Aldehydes, brother, the ones we have
What kind of scientist is Stephen Stephen Stephen?
Yes, he is a Russian scientist.
The reaction will be initiated from RCN in Stephen.
If it were tin chloride
SnCl₂ with HCl
Alright, like this
Tin chloride use
If we do it, then the reaction will be
Nascent hydrogen
Nascent hydrogen
Will break the bond,
An H will go here.
An H will go here.
Nitrogen will have
lone pair of
Electron, immediately you'll keep this AC nearby, okay, and finally, just like
You react with hydronium ions in an acidic medium.
Yeah, okay, speak up, sir, tell us at least this much
Give me some examples, what should I do, give me an example, come on, brother
We'll also give you an example, okay? Don't worry, just you
Don't be afraid, I'll do everything for you. Take your place at R's location.
C3 and this Russian scientist, they're putting cyanide on it.
It's necessary, okay. Tell me what you'd say about this. Look at this.
Cyanide is there, so what do you have on one? Look at the cyanide, I'm here
Look, in cyanide, if you have to leave carbon behind, then
You're on a sign, okay, like a carbon.
What do you call a carbon atom, child?
Methane has a single bond.
Bro, don't count the bonds of carbon and nitrogen
Carbon and carbon
So methane
And one more thing, what's yours, Signo, is yours.
What will be the prefix if the suffix is "one"? Methane.
You'll say, sir, cyanide is also a nitrile.
If you're speaking, I'll also tell you another IUPAC.
When writing nitriles, you also need to count the carbon atoms.
It will be fine, but what exactly needs to be done with this carbon?
Count one two carbon, we call it ethane here.
You're right, it's acetonitrile, so you'll write it as ethanenitrile, correct?
What will you write for ethanenitrile? Now both names are preferred.
You can do it, okay, come on now, let's go, brother Russian
What did the scientist use from Stephen to Stephen Tin?
It starts with tin chloride; I forgot to write it here.
Yes, okay, what will you use tin chloride and its
If HCl is mixed with three people, what will enter the reaction?
How many times will it take for Nacent Hydrogen?
Two times it will come, it will break the bond, and as soon as this
If the bond breaks, you'll become here C≡C single double bond
And here, you'll put an H, here you'll put an H, nitrogen will have
a lone pair of electrons will therefore keep it close to HCl
Next step, in the next step you don't need to do anything,
Perform acid hydrolysis, okay,
Reaction with hydronium ion, hydronium
The ion will go to oxygen and connect there.
And you'll get, CS3, C, what is it, H is there, double bound O, and your NH4Cl
This is an imine complex if nitrogen is having a double bond.
Bound Emain speaking is fine, okay then, everyone kindly tell with love
How did you find that Russian scientist who is from Russia?
Makes things Russian, what makes things right, okay, let's go
See you in the next video, end trips and tricky video
Don't forget to follow the editor for viewing, okay? Thank you.
