Alcohols | Alcohols, ethers, epoxides, sulfides | Organic chemistry | Khan Academy

[@a.6054]

"might do it in an indirect way" hahhaha love the subtlety :)

[@34naveed]

Stop reading the comments and get back to revision

[@joehernandez1555]

j+naveed ehsan

[@luckyalam8207]

Stfu 😎😎

[@blahblah-sg4yj]

ahahahahahahahahahaahahahah

[@walaa4409]

😂😂

[@冷冷-k7x]

tyyy

[@PopArt]

I'm in a completely unrelated field, but I enjoy these lessons on my lunch breaks. Really enjoyed this one. Thanks!

[@0037sammie]

I wish I discovered these videos before I flunked A level chemistry. They really make chemistry idiot proof.

[@faris3061]

"Indirect way"

[@VivekDS1]

I think its legit to name the second compound as 2,2 dibromooct -3 -yne-5-ol

[@djungelskogs_bf]

my chemistry teacher told me this Friday that I'll have a oral exam about this topic tomorrow, because I missed the exam, and I was very nervous about it, but this actually helped me! Thank you!

[@dinok4774]

God bless you good sir, helping with science one problem at a time, not all heros wear capes

[@VungL]

3:16 let's try to name this BEAST!!!! 😂😂😂

[@camilagace]

Your videos are much easier than listening to my teacher. Vary Informative. ThankS:D

[@gmtom19]

Interesting. surely calling the molecuel 2,2-dibromooct-4-yn-5-ol. because that way you get a lower total of numbers over all.

[@fernandoburrola]

you really helped me to understand biochem! Thank you!!!!!

[@xXSquishyXx8D]

Because the fact that it's an alcohol takes precedence over the fact that the carbon skeleton is of an alkane.

[@minhdiszles]

THIS MAKES SO MUCH SENSE NOW

[@abdulaleemgaad3140]

Very helpful.Thanks alot.

[@ILoveyouxoxo93]

I learn everything from this man. not my professors.

[@WalauDark]

OMFG i got a test tomorrow and i was sooo DESPERATE until i saw your video!!!! nice work !!

[@SpacySpaceCadet]

Love your videos> I'm not even taking organic chemistry yet , and I still enjoy watching them .

[@xYafax]

That help me! Thank you!

[@andresramirez1786]

@khanacademy i believe you made a mistake at 3:53 supposing that you should numbering the chain from the opposite direction so that the alkyne would get the lowest number possible

[@rwayle]

Good suggestion, but the alcohol is the highest priority functional group in this molecule, and the rule is we need to give it the lowest number possible.

[@indiewalnut8956]

but can that molecule even exist?

[@kanishgupta5080]

Yes u r correct my friend it was my doubt too and according to IUPAC lowest numbering rule comes at priority

[@J-Zone]

alcohol is more prioritized than alkyne my friend.

[@Emannn97]

I might've missed this being mentioned at some point in the playlist .. but I do not understand why and when would we start numbering the Carbon atoms from right to left or vice versa. Help? :) Oh, and I've been getting a lot of help from your videos and obsessed a lot over them at school which resulted in my teacher using your work to help us understand better! Thank you!

[@TheTakeover55]

yes, i was always taught that the double/triple bond has precedence over everything else

[@nana____fox]

but in the case of alcohols, start numbering nearer the hydroxyl group. :)

[@curtpiazza1688]

Great! ❤ 😊 Thanx for informing about the difference between ethanol and methanol!

[@mkamakacci]

Salman Khan YOU'RE THE MAN!!

[@tuompie]

I had a test on these in school. Helps out a ton!

[@exploreindia3978]

Oooo...my god...12 years before..u commented on this video R u there...😅??

[@sidrahzz485]

Hi guys i recently finished my biomed degree so revisiting all the resources i used lool reminiscing massive fan of khan academy.. starting my uni course in medicine if anyone want some inside info lmk more than happy to help :)

[@TheMonaMonster]

you teach WAAAAY better than my lame chem teacher. i wish you were my teacher...

[@Haku1234567890]

It's an alcohol, so you start counting from the side closest to the -OH

[@riafrancis3803]

helps a lot !! thnxx!

[@SWatchik]

@khanacademy for the 7,7-dibromo-oct-5-yn-4-ol, why wouldn't it be 2,2-dibromo-oct-3-yn-5-ol?

[@tharunjs9480]

Me who just surfing videos for indian jee mains exam : " My expectation is beyond your imagination "

[@ADOSMOORINOS]

For the 2nd alcohol, if I was finding your way of naming it confusing, would an alternative be 7,7-dibromo-4-hydroxy-5-octyne?

[@gccgmt1079]

+aiden Moore octinol*

[@marshmellow5344]

Yes it can be!

[@marshmellow5344]

@@gccgmt1079 i think it can't be octinol since we've already used the OH group as a prefix, which was the "hydroxy" in the name. So in this alternative name, since we've used OH as a substituent, we will have the "yne" as suffix for the parent chain

[@ADOSMOORINOS]

@@marshmellow5344 This is hilarious to me, because I understand none of this now. Absolutely 0 F*cking Percent of this, Way to go me 5 years back though

[@marshmellow5344]

@@ADOSMOORINOS hahahaha! I understand. In a few years I'll probably forget all of these too. Before replying, i thought that it's no use replying anymore since this question was from a few years ago and I'm extra late 🤣 but I realized that in the future ppl might scroll through the comments and stumble across this question, so I answered to give clarity. I hope I helped them 🤣

[@rsoderling30]

"Let's, let's try to name this... beast right here."

[@ThePeterDislikeShow]

Are there any other alcohols besides ethanol that you can drink?

[@harryfire411]

Please make text a little bigger so it can be read on a smartphone Also purple over black doesn't contrast well enough to be visible on smartphone

[@Dig2GoldZ]

Thanks! I was learning stuff about alcohols today and you so happen to post a video about it =]

[@bonjouramis9348]

سلام عليكم انت من الجزائر راني محتاجك

[@sheldonmachado1005]

in the molecule with two bromines,wont it start with the 'hydroxy' prefix??......

[@yukiibeauty07]

because you always number the first carbon as the one with the C=O not necessarily the smallest

[@babygurl25392]

y subtitiles? u speak perfect clear english

[@jennywanderervlogs5645]

thank you

[@Amina9871]

this might do it in a more indirect way XD....funny and helpful

[@Aryan45812]

are these videos that much good to prepare for iit-jee???....do reply...

[@YeshiMareg-m1o]

Wow exlenet!!!

[@Asd_76]

1:18 You do not want to drink methanol! You may not want to drink ethanol either...

[@ruturajnerurkar7530]

you are amazing

[@applezheng97]

for the cyclohexanol would i matter if i wrote it as 1-cyclohexanol? And for the 2nd example can i count starting from the other side ( right to left) instead ?

[@bilalbhatti9898]

The alcohol overpowers everything right? So you have to give the alcohol the lowest number which means you have to start numbering to the end of the chain that will give the alcohol the lowest number. The alcohol group is telling you where to number.

[@AliAhmed-ln2ns]

Thx that help me ❤️

[@improvemyenglish]

Concepts of chemistry illustrated in a story. See KZbin video "Chemistry Simplified".

[@BassmrDK]

At 3:33 the answer to your question is being answered by himself.

[@Silverhive2.0]

Wow😮

[@chander.261]

im sorry sir, but aren't alkynes supposed to be linear?

[@Starrysky0000]

This.... 10years before🥺

[@wulfaxe7661]

NICE!

[@danieljohnsopardenilla997]

4:48 can it also be named 2,2-dibromooct-3-yn-5-ol?

[@kilroywashere1628]

daniel pardenilla I think that that would be the correct name, since the location of the triple bond is prioritized over the location of the substituents.

[@Ponnyboy555]

Actually it is 2,2-dibromo-oct-3-yn-5-ol. ))) But great videos! Greetings from Czech Republic )))

[@will8831]

best teacher ever lol.

[@abhiramjoshi827]

at 6;42, can't it be named as 1,3 di hydroxy propane??

[@Joelpenda]

he is inspired

[@nwaoparafavour7080]

What's the reason for the cyclo?

[@ninaparvin1253]

This is only system of numbering of carbons,,,, but the reactions of alchohole had not here,,😔😔

[@cookiezx123]

how come it is propanE-1,3-diol not propan-1,3-diol???

[@VungL]

0:46 noted 😂😂😂

[@amaansawrar5197]

the dislikes are from bitter teachers....

[@UlsterOrange]

In Europe at least this video would be incorrect. You count carbons from the shortest possible end. For instance with 2-pentanol, the correct labels are: 1 2 3 2 1 not: 5 4 3 2 1 Use this for an A-Level/O-Level/International and Euro-baccalaureates and you WILL get the question wrong.

[@Hardstylecraze]

thanks :megusta:

[@alexlm2]

You sound like Scarra

[@drx7543]

what the devise used to make this video .. help me please

[@patakisfriend]

You do not want to drink Methanol...IT WILL KILL YOU! lol! love these videos! Thanks so much! :D

[@thecotboy]

Shouldn't the most important group, which is the OH get the lowest possible number?

[@Jashish1]

i think that alkyne group cannot be write in line formula

[@ladyguen]

I'm quite confused. shouldn't the last example be a pentane? instead of propane? how did it became a propane when its structure did not show any differences on the first example except on the 2 alcohol group at both ends?

[@vatsalbhatnagar5221]

Yamat LadyGuen it sould

[@MellowMuch]

the two OH take the place of the carbons that YOU (not to point u out) are counting, so really there are only 3 carbons in that chain

[@santa7750]

🎉

[@tharunjs9480]

my school taugth me "propan-1,3-diol" instead of " 1,3 propanediol". Is there any problem with mentioning either way????

[@BareClause]

The alcohol should have the lowest number.

[@UlsterOrange]

@stevenhelock International baccalaureate examinations.

[@Kwwwwl]

Why does he not just say R-OH where the R is the REST of the group which is what all organic chemists i know call it instead of a radical.

[@KAiSKAjO]

*_Ich habe ein Lied gemacht, wo man die Alkanen Reihe mit Spaß lernen kann!_*

[@timothybauer3160]

Shouldn't the 2nd thing he named be counted the other way? That'll make it's name become 2,2-dibromo oct-3-yn-5-ol.

[@robbycoon7812]

In this molecule, since it is an alcohol, the priority of numbering is given to the alcohol group(OH). The carbon with the OH attachment is counted from the left giving it the number 4 versus from the right giving it a higher number of 5

[@Caveman1992sa]

because you want to give OH the lowest number always

[@amg703]

@goldensilverstar i was thinking the same omg

[@Gunner93_og]

PENT...PENTANNN.....PENTANNNN 3:02 hahahahah

[@AbscisicAciid]

he kind of sounds like dan from gossip girl omg

[@braddavis4377]

It is him, that is what he did after the show hahahaha. Just kidding.

[@SkukS]

then we should ditch the E...

[@goneill520]

How that alkyne is drawn give me anxiety. It should be 180 degrees

[@nihayaturrohmah4230]

#41

[@goldensilverstar]

"Name this beast right here" lol wot the fuck?

[@norwayte]

Good AND funny. :-)

[@sharaadsingh2038]

Isn't it supposed to be 1,5??

[@sharaadsingh2038]

For the last one

[@D_A_D_]

3:39 is he speaking GERMAN?!

[@hemant1993]

wow funny

[@bonjouramis9348]

كاش واحد جزاءريين هنا راني مسحقهم

[@Menegoth]

So, Khan's a dirty teetotaler...

[@TrulyF4]

Does anyone else get anoyed when he repeats what he is writing down?

[@nattbheee53]

no

[@daviamantock545]

Yes

[@pankezitoxd]

Find it really helpful, it gets it stuck in my head