1-Phenyl-2-nitropropene (P2NP) Video Synthesis From Benzaldehyde and Nitroethane. Henry Reaction.

[Fenster]

You need to take the Molecular Mass of both Benzaldehyde and P2NP. 100g of Benzaldehyde is just under 1 mole, 100 grams of P2NP is around .7 of a mole. Meaning you got around 70% if theoretical yield.

 

[Evilcarrot2]

Thank you. I had 100ml of nitroethane and 1 mol=75g
So I increased benzaldehyde to be slight excess but I didn't know how to work out %yield.
If that was the case I did 1.333333 mols of nitroethane

 

[Evilcarrot2]

I tried to work it out but struggled.
So I used 1.3333333333 mols nitroethane
And 1.338107802487749 mols of benzaldehyde being a very slight excess. Does that mean the nitroethane is my limiting factor. So is it yied/1.333333333?
Sorry once I get this down I won't ask the question again

 

[Evilcarrot2]

I think I get it.
So it's 0.92 mol of p2np divide that by the 1.3333333 mols nitroethane and I get me %yield of 69.19%

 

[Fenster]

Yes. That's correct.

 

[Charlie3]

Hi is the cas number for the nitroethane 79-24-3?

 

[yin-yang]

Yes, that's the right cas.

 

[teodor]

can hexamine (methenamine) be used for the synthesis

 

[UWe9o12jkied91d]

no, atleast not with acceptable yields. You could try to freebase amindoacid salts from supplements and such(just a theory). Or if you are in the EU I can ship some.

 

[Fenster]

I've even heard some have had such with GABA.

 

[G.Patton]

Cheers! New video is here!

 

[Mr.Blanks00]

hello bad potato, are you using a cyclohexamine catalyst, or n butylamine.

 

[Evilcarrot2]

Hi I'm using butylamine.

 

[Mr.Blanks00]

Oh ok friends,thanks .

 

[MadHatter]

Honestly, is there any advantage to any of the catalysts? Is n-butylamine better than cyclohexylamine or is it vice versa? Or better and better- do they modify the reaction in terms of yield, sensitivity or robustness in any way? Which one would our experts choose if they had both?

 

[UWe9o12jkied91d]

I'm no expert by any means but I've tried : n-butyl, cyclohexil, monoetanolo, NaOH, Dibutil. All primary amines worked great, everything else was not acceptable, so chose the least stinky primary amine I guess.

 

[Felix34-73]

Can methanol or ethanol be used instead of n-butylamine?
@G.Patton

Fenster​

 

[Marvin "Popcorn" Sutton]

n-butylamine is a catalyst, it can be replaced by cyclohexylamine

 

[cjcb[eqhfkbyf]

Hello everyone!Too huge proportions Please tell me for 200 ml of benzaldehyde and nitroethane how much vinegar and isoproponal you need acetamide, if it is possible, how much to use?

 

[HairyPoppins]

Ive used the Nipron ®™ fuel enrichment additive cas 79-24-3 Pure nitroethane based, 100 ml with ammonium acetate and benzldehyde to produce p2np it seemed ok to me was just hard to crystalize. i just threw in a small cube of nitrogen to get it cold enough

 

[yuiopjkl]

Can you tell me all the steps of synthesis with ammonium acetate

How many ml of ammonium acetate did you use?

Did you use acetic acid?
Reflux time?
yield?

Thanks in advance