I love math and physics, but i can't stand chemistry. Maybe cause i have hippopotomonstrosesquipedaliophobia (fear of long words)...

@farhanakhan6349

3 жыл бұрын

😂😂😂 good example of your phobia

For the 2nd example, I am not sure whether it could be 3,6,9,9-tetramethyldodecane or not coz we can do it from the opposite direction to get 4,4,7,10-tetramethyldodecane, which gives the least number combination

You sir are Awesome! Now I think that I can actually nail the organic chemistry part (if not all) of the A Level Chemistry exam that I have in a week's time, and the even better thing is, you have videos for Physics as well! :D

Your explanations are so clear and concise!

nicely explained i really learned a lot from ur vedios

amazing examples and teaching style

Shouldn't it be 4,4,7,10-tetramethyldodecane since you have to get the lowest number possible? 4+4+7+10 = 25 but 3+6+9+9 = 27 so 3,6,9,9-tetramethyldodecane doesn't give the lowest number possible.

is the shape of the cyclo-carbon arbitrary? I would guess that VSPER theory would effect it?

BIS-Bureau of Indian Standards

In your previous video you said how breaking the chain up into more alkyl groups would make labeling easier. Could your second example have also been called 1-sec-butyl-4,7,7-trimethylnonane? Would this still be a valid answer?

Thanks!

They would be called tert-butyl groups if he used common naming. However, for the third example he gave us, he provided us with the systematic name.

thats what i was going to point out that their tert butyl groups,

thank you thank you thank you sir

ty so much

yay i got all off them right before you drew them

Hes right. This is oddly fun to do lol.

@danamclemore3805

8 жыл бұрын

I thought I was the only one!!!!

Only look at the other substituent groups in a tiebreaker situation where numbering at either end will yield the same, lowest number. For example, if there is a methyl alkyl substituent, equally, at both ends of a main carbon chain (3-methyl at one end, 3-methyl at the other end), THEN you look to the next substituent group occurrence for determining which end is first. If the chain yields A) 3-methyl-4-propyl at one end and B) 3-methyl-5-propyl at the other end, the former (A) is correct.

In the first example you draw the isopropyl groups as sec-propyls. In your previous videos your explanation for the iso- prefix is that the adjoining carbon of the group to the backbone is joint to another single carbon. Was your definition wrong? I just noticed you have drawn iso-s as sec-s a few times.

I was wondering, for the first example, where there is "2, 9- diisopropyl," can we omit the "di," since we know by the "2" and the "9" that there are two of them?

@casiaa98

8 жыл бұрын

+Hanan Nasser it's just for the name to be more clear, as far as i know u cant omit that

Im a little confused. Is the isopropyl not meant to be called secpropyl since the 2 other carbons are branching off from the first carbon? what is the difference between sec and iso? 3:14

if we number the 1,1,.dimethylethyl the other way around, don't we get an iso-butyl instead of a tert-butyl?

@ddmothafucka6006

2 жыл бұрын

I was wondering about it too

Which app is this ? which app do you use to explain ?

Nice...

Thx Khanacademy and especially u Sal...for.making such awesome and useful Vids...wish u cud make some more vids on electromagnetic induction bfor end of Dec...my exams are coming up and I'm totally confused about that topic

@ddmothafucka6006

2 жыл бұрын

so how's life going ?

@tornouttoga4386

5 ай бұрын

@@ddmothafucka6006 so how's life going?

@ddmothafucka6006

5 ай бұрын

@@tornouttoga4386 been gud

07:44 Why is it "bis" now instead of "di"?

Good question! I think 3, 6, 9, 9-tetramethyldodecane is still correct because I believe naming convention calls for "occasion of first difference". This means you number your main carbon chain/ring where you will first encounter an alkyl substituent group regardless of where in the chain others occur. 4, 4, 7, 10 begins the substituent group one carbon later than the 3, 6, 9, 9 naming and thus the latter is correct.

@ddmothafucka6006

2 жыл бұрын

yes because 3 is lower than 4 and thus we started the numbering from the lowest possible number considering other substituents will be closer to the initial substituent

i like theese

9:06 When would you use tert-butyl?

@ddmothafucka6006

2 жыл бұрын

when 3 methyl branches are coming off of the original methyl branch which is connected to the main carbon chain

WHY their an I before do decane

Isn’t the 1,1 dimethyl portion the redundancy where it’s actually a single methyl group at the 1 carbon spot on each ethyl group? The redundancy of saying 1,1 di-something is really confusing...

Once you start nomenclature, there's no turning back.

It would be 3,3,6,9-tetramethyldodecane

I'll have 2 number 9's, one number 9 large

are isopropyl and secpropyl the same?

@vnrp5605

7 жыл бұрын

^^ ASKING THE REAL QUESTIONS HERE

@sidassassin6670

7 жыл бұрын

yah pretty much

what did 'Notheus' say, bro??

#10

Organic Chemistry is so much fun lol

@ddmothafucka6006

5 ай бұрын

guys I was wrong

1:59

@elyzartria3040

9 жыл бұрын

looks like a sack of balls

I laughed @5:02-5:08. lol you are funny :)

9:09.. Jazz Hands!

Yeah, but isn't (1,1-dimethylethyl) so much nicer! :)

@sidassassin6670

7 жыл бұрын

lol

true 3,6,9,9, tetramethyldodecane is impossible because their is a better naming

@kabirulislam3707

5 жыл бұрын

No because from the opposite side the di methyl is in the fourth place

5:03 - 5:08 LOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOL

Your

HAHAHAHHAHAHAHHAHA SAL! 5:02-5:08

@hassanmalik9876

4 жыл бұрын

Lmao, the way he says "lets do another one" makes it sound sarcastic a bit even though I know he's not being sarcastic

LOOOOOOOOL