Halohydrin Formation

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Halohydrin Formation

Рет қаралды 40,592

Күн бұрын

What's a halohydrin, how do we form them, and what do they do? Find out in this clip!
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Пікірлер: 62

@hrishikeshhardikar4383 6 жыл бұрын

Just amazing! I am from India, and there are thousands of tutors hungry for money, who will take a lot but don’t return anything. Whereas you have covered my whole chemistry Syllabus of organic chem of 12th grade on your channel! Your channel is best for a science stream beginner like me! Even my friends love it!

@PunmasterSTP 2 жыл бұрын

That's really good to hear about covering your syllabus! I'm just curious; how have your studies been going over the past few years?

@blaze102 Жыл бұрын

@@PunmasterSTPअपना काम कर

@PunmasterSTP Жыл бұрын

@@blaze102 Sorry I'm not quite sure what you meant, as I'm only fluent in English and I wasn't sure about what google translate told me. Would you care to explain?

@blaze102 Жыл бұрын

@@PunmasterSTP I just wanted to ask that the person you are asking about how he studies are going on in past few years in comment 4 month ago is not a well known personality so why you are asking

@PunmasterSTP Жыл бұрын

@@blaze102 Ah, I think I see. I might also ask the question "why not?" A few people have replied to these types of comments, even after a decade, and I think it's been a neat experience for both me and them.

@drvir 6 жыл бұрын

Back to the old style? No problem, I just love the lucid manner in which you explain things

@ProfessorDaveExplains 6 жыл бұрын

just releasing 20 or so the old way to fill in some gaps!

@leeevertt2728 Жыл бұрын

THANK YOU FOR THIS my professor's horrbile and I wouldnt even be surprised if his intention is to fail out as many students from ochem as he can. He covered this during the last 5 mins of class and i didnt get anything, so this really helped

@PunmasterSTP 2 жыл бұрын

Halohydrin? More like "Dave's videos for the win!"

@sciencenerd7639 2 жыл бұрын

delightful video

@danielledouglas7495 5 жыл бұрын

I love these videos so much!! They are a true life saver!

@ALdawg1994 6 жыл бұрын

Prof Dave! We literally just covered this today! How did you know I needed to watch your breakdown of it?

@PunmasterSTP 2 жыл бұрын

I know it's been years, but how'd the rest of your ochem class go?

@ALdawg1994 2 жыл бұрын

@@PunmasterSTP Well I'm in 3rd yr of med school now so I guess it went alright haha.

@PunmasterSTP 2 жыл бұрын

@@ALdawg1994 Sounds good and I’m glad to hear it!

@SailorJenova 6 жыл бұрын

Man, wish these were up when I was in Organic I! XD

@deeshikayadav7675 6 жыл бұрын

Your hairstyle is too good and videos also

@rassimsimou1594 Жыл бұрын

Good

@roeyy7148 3 күн бұрын

at the end of the video, when the Br2 and water reacts with the cyclohexane, could there be another product when the bromide points inside and the OH points outside? like withe the Br2 reaction without water

@manikandangunaseelan5624 6 жыл бұрын

THE OLD STYLE YAYAAYYAYAYAY

@tanishqagarwal2806 3 жыл бұрын

You are just awesome!! Wish you peace man

@cmatrix4761 6 жыл бұрын

YAAY!! MORE ORGANIC CHEMZES!!!

@prakharjain5059 4 жыл бұрын

Plz explain halohydrogenation on alkynes!

@Paraselene_Tao 2 жыл бұрын

Phenomenal. Thank you.

@prahladverma7979 5 жыл бұрын

You are awesome, Prof. Just awesome. Thank you:)

@rittenbrake1613 6 жыл бұрын

Hi Dave , why halogen molecules are more reactive than the H atom (which should be more partial positive than halogen atom?)in H2O ? Why the double bond wont attack that H atom first ? As alkene are surrounded by H2O (final product should be formed as an alcohol?) , why halogen molecules still stand a chance to be attacked by the double bond ? and sorry to bother u more , I want to also ask about Hydroboration , on step 2 : oxidation , what if it is a OH- attached to the Boron instead of the OOH- , then OH- will have nothing to kick out (originally OOH- will kick out OH- and replaced by R group to form - BOR ) , and the R group can't attach back to the Oxygen atom , then It would be Boron with 3 OH- , B(OH)3 1. can I just skip the H2O2 ( not adding any) and just add H2O & NaOH 2. is it OOH- must attack before OH- attack Boron? so can't form B(OH)3 directly? any chance OH- can attack before OOH- when OH- is just adjacent to the Boron atom? Thank you so much so much if u can answer me all of this , Thank you for the new videos , I can see u r going to upload a lot of new organic chemistry videos in the upcoming days (the private unreleased videos list), Thank you so much.

@ProfessorDaveExplains 6 жыл бұрын

don't worry, a hydroboration oxidation tutorial is coming! a pi bond won't attack water, that would leave a carbocation and a hydroxide, not a likely mechanism. bromine insertion is thermodynamically preferable.don't forget that the kind of hydration you're talking about is acid-catalyzed and this is in CCl4 or a similar aprotic solvent.

@beinghumandwd2446 6 жыл бұрын

nice explanation

@djennings-DDS 6 жыл бұрын

Nice video! Would it be correct to say that water is acting as an acid in that last step of the last reaction?

@ProfessorDaveExplains 6 жыл бұрын

when water attacks it's acting as a nucleophile, and in the proton transfer that isn't shown another water molecule acts as a base!

@nilsnickname4455 3 ай бұрын

Dear Dave, your lectures are nearly perfect. But sometimes you write on the board while explaining your arrow-pushing. While explaining arrow-pushing you are standing direct in front of your writings, so that one sees it first when you finished your drawings. So it is difficult to comprehend your arrow-pushing. For example in this video from 9:20 to 9:40 🙂

@karolineketelhake8596 4 жыл бұрын

Hi Dave, i'm little bit confused why Halogenation is an sn1 and Hydroxyhalogenation is an sn2, cause both gut the same Bromonium intermediate. Or is there a difference between hydroxyhalogenation and halohydrin Formation?

@PunmasterSTP 2 жыл бұрын

If you are referring to dihalogenation, I think that the second step is also sn2. Take a look at another of Dave's videos here: kzfaq.info/get/bejne/lcloZ82pudWZkqs.html As far as I can tell, "hydroxyhalogenation" means the same thing as "halohydrin formation".

@risheekarora1507 6 жыл бұрын

Thanks man.... Awesome intro btw

@reemqurban6651 6 жыл бұрын

love your videos👍

@ExplosiveBrohoof 4 жыл бұрын

Wouldn't there be too much steric hindrance to do SN2 in the bromonium ion?

@dobbysurfs 3 жыл бұрын

Professor dave please reply In previous videos you told h20 is a weak nucleophile and can only do sn1 , but in this video how come h20 do sn2 ???

@ProfessorDaveExplains 3 жыл бұрын

It can attack highly electrophilic species, like the intermediate here. And carbocations, etc.

@dobbysurfs 3 жыл бұрын

@@ProfessorDaveExplains in last part you told that h20 is gona attack at more subsituted carbon, but in this case the both the carbons which is attached to bromine are evenly subsituted right? So h20 can attack either way?

@dobbysurfs 3 жыл бұрын

Please reply

@juijani4445 3 жыл бұрын

@@dobbysurfs Look carefully! There's a methyl group on one of the carbons!

@AS-ds4in Жыл бұрын

9:25 why would the methyl get pushed up?

@sandrozernicki Жыл бұрын

because there is a bromo atom causing hindrance, so when water attacks, it does from the place where it finds less problems to approach. methyl changes cause that carbon was the only one that water could get.... and 2 things can not occupy same spot in space (in this case)

@DapaChrons 5 жыл бұрын

cheers

@ivannisevic6685 4 жыл бұрын

Didn't you say Sn2 can't happen on tertiary carbons? Also, since you say water solvent will always react first if it can, does that mean all Sn and E reactions have to be done in aprotic solvents if we don't want to introduce OH groups?

@btag3714 Жыл бұрын

It is also important to consider that water is not a particularly good nucleophile. The water acted as a nucleophile in this case because the bromonium ion was very electrophilic. For example, this would not happen in an Sn2 reaction, since a carbon which is only partially positive is no where near as good of an electrophile