@minoc2 You are right. Shows me that I shouldn't think of the names on the fly. Will make a correction video.

7:52 Should be 4-Methylnonane As we take the longest chain

@VICKY_X19

3 жыл бұрын

We never do that according to the rules❗️

@josephmalitig5553

2 жыл бұрын

I agree bro. So what's the right answer?

@chandramoulimukherjee6653

Жыл бұрын

Yep

Why paying for college/university when KZread is free and better. Lol

@ninjanerdstudent6937

5 жыл бұрын

College is just for a credential, nothing more. It stands as proof of having learned it at some point. I wish there was KZread University.

@owenhunt

5 жыл бұрын

@@ninjanerdstudent6937 May I give you my life, my liege

@mr.j4475

5 жыл бұрын

I literally skip my chemistry class and just watch these videos and end up getting decent scores in my tests and exams.

@onontochowdhury7337

5 жыл бұрын

nah im in 9th grade

@WiseRomanEmperor

5 жыл бұрын

You dont get a masters degree from KZread 😁

10:58 That'd be my Chemistry tutor calling to complain about how easy you make it all seem

7:52 I would call this 4-methylnonane.

@joshmyers8814

7 жыл бұрын

you sir are correct

@saketgurjar6158

7 жыл бұрын

So then should you call it 2-propyl heptane or 4-methyl nonane

@tanweerabbas8056

7 жыл бұрын

Daniel Andrew DeMott Watch the next video

@oiiwweew

7 жыл бұрын

how come? EDIT: nvm I just saw the next video

@39abii

5 жыл бұрын

if we take the longest chain this makes more sense

LOL my teacher pretty much tried to teach us this in a span of 3 weeks and she made it so damn complicated that I simply didn't know. I watch 4 videos here and it all makes perfectly sense.

@MysticDragons

8 жыл бұрын

***** different teachers I suppose.

@Chiaraa18

6 жыл бұрын

Same.. what's that with those teachers😂

@Azuriiee

2 жыл бұрын

I'm thankful that my teacher explained it well

@acid6722

5 ай бұрын

bro after 8 years, what are you doing now currently as i suppose you are graduated

But thank you for what you do, the free help is definitely appreciated.

He probably would have kept on going if it wasn't for that phonecall :(

@ninjanerdstudent6937

5 жыл бұрын

Spoiler Alert!

@jamesgedak551

5 жыл бұрын

HAHAHA I was thinking the same thing

I have a mnemonic device for remembering the first four alkanes: My Ethiopian Professor's Butt. My for Methane, Ethiopian for Ethane, Professor for Propane, and Butt for Butane. Every other alkane that comes after that follows the numeric pattern pentane(5), hexane(6) heptane(7) and etc. Not the most appropriate phrase but hope this helps :)

@ritahaddad4664

2 жыл бұрын

I use monkeys eat purple bananas

@khalilicf

Жыл бұрын

or just learn it as it is it's not that hard

@iam.tryphena

Жыл бұрын

@@khalilicf people learn and remember things differently❤️

@khalilicf

Жыл бұрын

@@iam.tryphena ok 🤓

@Learning-sadly

Жыл бұрын

@Mohammed Abid from all the possible mnemonics you chose a professor's butt 😂🙈

Thank you!!! I have an organic chemistry exam next Friday and this is helping me review and understand a lot more/better.

Beautifully taught! You're amazing and the reason I'm passing chemistry and math and life in general!!! Thank you

Thanks so much Khan! My lecturer makes this stuff so complex but you explain it so well and clearly!

Thanks Sal my chemistry and maths are increasing rapidly all thanks to your great academy!

Thank you I have been struggling with this and your video help me a lot will continue to watch and learn

Great demonstration, thanks for making understanding these chains much easier.

lmao my finals in 6 days and khan academy always saves my day

Thank you so much! I was struggling with trying to figure this out through reading the text and wasn't getting the concept. Your explanation in the video made it all click, I'm so grateful!

That's the most interesting most basic iupac nomenclature ever!!!! Love it👌

WOW after so many yrs i finally understand simple concepts #thank you so much SAL

ive watched so many videos like this and did not understand until this video. THANK YOU

Perfect for beginners! Awesome work Khan Academy!

@brco2003 Each carbon has 4 bonds. If it is already bonded to 2 other carbons then the other 2 will be to hydrogen. If it only has 1 carbon bond, the other 3 will be hydrogen

Hi sir I just wanted to say your making this so easy, and your a god sent!

Sir, I thank you from the very bottom of my heart. Words won't express my gratitude.

Thank you so much for explaining! I could not understand the explanation on my chemistry textbook!! I'm doing a distance learning and videos like this helps alot!!

OMG explanations that actually make sense!!!

I'm reviewing my first 2yrs of university with your channel and thinking how different my grades in highschool would have been if i had found your channel earlier.

This was great! Thank you!

Thank you, you help me understand real good.

@khanacademy Not critical at all - I am grateful for the refreshing way to remember my basic chemistry. Thanks again for sharing.

This is so fun.

the different collors really helps

Thx helped a lot!

This video was so helpful. Thanks Mr. Khan

Best channel to get up things in the easiest way in chemistry

Oh I understand it now, thank you!

2-PROPYL WILL MAKE THEE LONGES CHAIN

Really helpful!!!! Thank you so much!!!!!

Yes, thank you!

Now that I see the 2-propyl heptane is incorrect and should be 4-methyl nonane, are you supposed to check the length of the carbon chain even off of an alkyl group? I thought you only determine the length of the carbon chain based off of the amount of carbons BEFORE drawing an alkyl group. So just to reiterate, are you supposed to recheck the length of the carbon chain once you've draw in an alkyl group to make sure that it is in fact the longest chain? If any of this made sense. PLEASE HELP

Thanks for the video, it was really helpful!

Wow! great explaining! I like using colors coz it's easy to understand =) Thanx alot !!

OMG THANK YOU SO MUCH. i just started grade 12 chemistry and like many people my teacher makes these concepts so complicated

Awesome explanation!

I think you might be the reason I pass O chem. Thank you. It's so incomprehensible in class, but easy here!

7:50 the longest chain is diff

Thank you so much bcz I was watched last time 7 years old ago..... So helpful lecture.... Life struggle

Thanks so much sir!

This is very helpful

I'm binging organic chemistry playlist and this got 0 to a 100 real quick

this surelyy helped me a problem i couldnt solve

THANK YOU SO MUCH! 🙌🙌🙌

u r awesome. Thanks a lot.

God bless you Mr. KHAN thanks for the videos great help :D

Thank you so much!

That's actually 4-methyl nonane not 2-propyl heptane. It's the longest chain of carbons you use as your base for the name. Which substituent has less carbons? Methyl or propyl in this case? Methyl.

@kdubsist

8 жыл бұрын

+Christopher Johnson I noticed this as well, so what would be the proper way to write 2-propyl heptane? or will this just always be referred to as the other?

@thrls

8 жыл бұрын

yeah it just can't exist, it would always be 4-methyl nonane.

@MaesterPeemore

8 жыл бұрын

+Christopher Johnson he made a correction video

THANK YOU SO MUCH.

Sir, you make it look sooooo eassssyyy! Thank you!! :)

Well thanks 💛💛💛

thankyou so much!

aw man...i luckily have a decent chem teacher this semester but we are tackling o-chem in the last chapter...i've been frozen since we started going over it and became more and more frightened as I read textbooks and different science sites online. I just remembered about Khan Academy! I'm finally understanding all the notes in front of me! Thanks for saving my butt again!

it was so helpful :)

U r great....

yoo such a great teacher .. i'm from Egypt and this it not my mother language but i just understood every thing .. thanks :D

@minoc2 Shouldn;'t it be 3-methylnonane

@khanacademy I just watched "Representing Structures of Organic Molecules" which I should have watched before wasting your time. Thanks!

thnks!

You're goated!

brilliant

Thank you❤️

You are saving me!

Still useful after 10 years

bro thank you so much

With the addition of the propyl group to the heptane, the longest carbon chain is no longer 7. If you draw out the entire molecule without numbering the carbons before adding the propyl group and number the carbons afterwards, you'll find that it's nonane with a methyl group attached at the 4th carbon.

that phone ring timing was perfect.

@rodoshi963

3 жыл бұрын

no, he probably would've kept on going if the phone didn't ring :(

great

THANK YOU THANK YOU THANK YOU

7:57 if you make a molecular structure like that, the principal carbon chain becomes 9 and you also said that while naming the molecules, you should the biggest chain into consideration..., so...?

@khanacademy Ah, I see. Thanks!

Wouldn't that be 4-methyl nonane? Because the longest chain has nine carbons?

@sahibjyotsingh5810

4 жыл бұрын

Yes

@sahibjyotsingh5810

4 жыл бұрын

You are right

Love these videos, all the science videos are really helping me loads with understanding everything I'm learning in university currently so thanks :-)

@kevwilbe5205

9 жыл бұрын

SexyshyBlonde i am highschooler, I study this in high school

@abaundwal

8 жыл бұрын

+Kev Wilbe Me too! Asians!!

where is the sound?

I think that it would be the same thing as an alkane has sigma bonds which are free to rotate, therefore they can change their shapes into both 4-Methylnonane and 2-propylheptane.

awesoeme

You rock man!!!!

at 10:50, what happens if the branch also diverges into more branches? How would it be named? Also, how would you name a molecule if there are multiple branches (i.e. 3-4-propyl heptane?)

It is good

How would you draw branches that have things like "....6-(4-methylpentyl)dodecane" I can draw the rest of the problem, just slightly confused at the methylpentyl part.

where do you teach??

thanks a bunch! :)

if u go reverse, i can call 2 propyl heptane as 4 methyl nonane, im confused

Correct me if I am wrong, but in regards to 6-butyltetradecane and the idea that 9-butyltetradecane never being an actual name since it would be named the first way ( 6-butyltetradecane)... Could you say that with a chain and one group attached, you would never attach it to a carbon greater than the halfway point, for example the last number to exist would be 7-butyltetradecane in this case. Please let me know if that makes sense?

Beautiful hand writing

does the behavior of a molecule vary by a lot depending on which carbon a group is attached to?

8:03 4-methyl octane?

Yok know you do a better job than my teacher does bc i could understand this lesson here instead of my school even if English is not my native language

Help? What should be the next video after this? In the order of the video viewing, it jumps to double bonds etc. A video seems to be missing. Help!

You are my savior! Thank you very much! Godbless you :) :*

That ringtone though :v

You my friend are a legend =D