Bromobenzene : Organic Synthesis

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Hello friends, In this video we will Synthesise bromobenzene by the direct bromination of benzene in the presence of halogen carrier pyridine
It's a pretty straight forward video and mistakes can kill you very easily.
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Опубликовано:

23 сен 2024

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Комментарии : 40

@ScienceWithJames 3 года назад

Been looking for more good chemistry channels, subscribed!

@douro20 2 года назад

p-dibromobenzene can be used to make 6,6-dibromoindigo, the major constituent of Tyrian purple.

@YouMockMe 3 года назад

I would have liked more details on the mechanisms for the reaction taking place.... still liked

@bedlaskybedla6361 3 года назад

Very nice! I never heard that pyridine can be used as catalyst. But how is it possible? You need strong Lewis acid, which can coordinate bromide anions. But Pyridine is Lewis base. Btw. bromobenzenes have boiling points around 220-225°C, so they don't distill before bromobenzene.

@bedlaskybedla6361 3 года назад

@@vibzzlab Thats interesting, says Vogel why pyridine suppres formation of p-bromobenzene (and what about o- isomer?). I found something about bromination of aromatic compounds using pyridine or tetrabutylammonium salts as a catalysts. cdnsciencepub.com/doi/pdf/10.1139/v74-373

@illya.ruslanovichshevchenk4106 3 года назад

@@bedlaskybedla6361 p-bromobenzene???????? There is only 1 isomer of bromobenzene!

@bedlaskybedla6361 3 года назад

@@illya.ruslanovichshevchenk4106 Sorry, you are right. I was probably thinking about dibromobenzene :D.

@Jose_Osorio 2 года назад

Hi, is the pyridine completely recovered at the end of the process? or what happen with this material?

@SodiumInteresting 2 года назад

As soon as I added 100ml of 5% naoh and crude product to sep funnel all the red bromine colour went away and I was left with light yellow transparent emulsion. All instructions up to this point were followed except the quantity of bromine was more like 7-8ml. I continued anyway but this washing step seems to have destroyed my dark product and become an unseperable clear yellow aqueous solution. Any idea what is wrong?

@ashleyobrien4937 Год назад

er, the way you have that set up, with the inverted funnel with very little air space in it, that won't stop a decent suck back, if it ever happened , that is.

@foc2241 3 года назад

I did the synthesis too but used FeBr3 :D

@tukhanh2812 3 года назад

Nice, i used Iron powder as the catalyst and not straight FeBr3

@SodiumInteresting 2 года назад

Great video, this will help me

@mayurnaik4784 2 года назад

What is chemical type of bromobenzene sir?

@aribinu8910 Год назад

Bromine in gas phase is so dangerous, its better if do rute via sandmeyer

@vibzzlab Год назад

This was just an academic video. I know the sandmeyer method is much more efficient

@ЭстХимик 3 года назад

I just make potassium sulphate but I don't know What sinthezis is next. Can you recommend some easy synthesis?

@aleksilepisto4822 3 года назад

Some inorganic pigments are easy to synthesize and look pretty. If you totally lack ideas, you can go to list of inorganic compounds in wikipedia and then start synthesizing them one by one skipping those that are too dangerous or expensive.

@ЭстХимик 3 года назад

@@vibzzlab thenks

@benjaminpainter378 3 года назад

How could this be converted into chlorobenzene? Would bubbling Cl2 into this solution of bromobenzene convert it? Could a liquid be added?

@benjaminpainter378 3 года назад

@@vibzzlab are there any other ways? And thank you for this. I am going to email you soon

@benjaminpainter378 2 года назад

@@Paonporteur yes. I was stupid when I wrote that.

@KeepAnimeDegenerate 2 года назад

Could iodobenzene be created in a similar way with solid iodine?

@Создатель-з7ъ Год назад

I think not. Only chlorine/brominebenzene is being prepared by this way. P. S. The method should ne modified. FeHal3 should be replaced with nitric acid.

@courtneyellul898 2 года назад

why is NaOH added pls?

@Создатель-з7ъ Год назад

To neutralize residual bromine.

@fabri___1883 3 года назад

I love this video! But pls i see that you have a lot of benzene.. you can make prayically everithing! Do some pharmaceticaoul synthesis

@fabri___1883 3 года назад

@@vibzzlab i dont have the notes becouse this is really complicated organic synthesis... but i have a lot of reaction schemes.. if you give to me your instagram i can send to you all of this stuff

@fabri___1883 3 года назад

@@vibzzlab thanks

@fabri___1883 3 года назад

@@vibzzlab idk why but google do not found your email

@fabri___1883 3 года назад

@@vibzzlab i will try again

@fabri___1883 3 года назад

@@vibzzlab perfect!

@fabri___1883 3 года назад

Hi man is always me.. where you take all of this benzene i really need it

@fabri___1883 3 года назад

@@vibzzlab serius ahhahah i need it ahhah