S3.2.5 Naming branched-chain alkanes

[@izanmohammed3584]

Thanks a lot. I have my chem finals tomorrow its almost midnight and nomenclature was a portion I didnt concentrate on. This helped a lot

[@MSJChem]

Glad I could help.

[@parisnelson5321]

You have saved my grades, thank you

[@MSJChem]

Glad I could help.

[@ac7plays152]

3:18 sir great video, helped me a lot. However, shouldn't this compound be 2-ethyl 3-methylpentane

[@cherise3945]

@@hanque5734 Thanks man I didn't get that part of the video until your explanation

[@TaeminnieLee]

No... because the longest chain is 6 carbons not 5. So 3,4-dimethylhexane is correct.

[@khushijain9550]

Thank you so much sir!! I was struggling with this topic but now it is clear to me..

[@MSJChem]

Glad I could help.

[@drjayanandantn]

Thanks a lot dude....Helped me a *LOT*...

[@MSJChem]

Glad I could help.

[@god9331]

the reason why 3,4-dimethylhexane is not referred to as ethyl is because its part of the carbon chain? im a little confused but this is the only way it made sense to me

[@rugvedpawar7114]

at 3:45, why did you go 3, 4 dimethyl.... for the compound on the left and then go 3-ethyl-2.... Do you not go in ascending order of where the alkyls are bonded?? or does it have to do with something else.

[@rugvedpawar7114]

nvm you said alphabet my bad.

[@MSJChem]

Rugved Pawar no problem.

[@speedytempo3819]

3:02 Why is the second one called 3-ethylhexane and not 3-methylhexane? I'm confused

[@MSJChem]

There is an ethyl group (C2H5) bonded to carbon number 3 of the longest chain (6 carbon atoms), hence the name 3-ethylhexane.

[@Sarah-ke3jg]

3:05 why did you number the locations like that?

[@MSJChem]

Sarah Al-Mulla You could number from the opposite end but you’d get the same name because the two methyl groups would still be on carbons numbered 3 and 4.

[@jaydenliu3090]

How many more videos do you have to make until you cover all of the syllabus

[@MSJChem]

I would say that I have probably covered almost all of the syllabus by now. Now I’m just updating old videos.

[@kyrielin5892]

3:20 why is the molecule not called 4-ethyl-3-methylhexane

[@MSJChem]

Longest chain is six carbons with two methyl groups

[@vanshmittal8760]

thanks sir for the info it helped me a lot

[@MSJChem]

Glad I could help.

[@nathanielessexmccullum2917]

@3:18 why isn't it 3-methyl-4-ethylhexane?

[@MSJChem]

Longest chain is 6 carbons atoms with two methyl branches.

[@nathanielessexmccullum2917]

@@MSJChem thank you, love the videos btw 👍

[@rRennnnn]

1:40 where did the methyl came from I'm so confused 😭

[@MSJChem]

The methyl is the CH3 group on the second carbon atom.

[@jaydenliu3090]

how come that example is called 3 ethylhexane

[@MSJChem]

The longest carbon chain is six carbon atoms and there is an ethyl group on carbon number 3.

[@jaydenliu3090]

how come that is called 3, 4 dimethylhexane instead of 4 ethyl 3 methylhexane

[@MSJChem]

The longest carbon chain is six carbon atoms and there are two methyl groups on carbons numbered 3 and 4.

[@jaydenliu3090]

Mike Sugiyama Jones but isn’t the group at carbon #4 CH2? Isn’t CH2 Ethyl?

[@MSJChem]

No, an ethyl group is C2H5.

[@jaydenliu3090]

Mike Sugiyama Jones yea so isn’t the group on carbon #4 CH2+CH3 =C2H5, an ethyl group?

[@MSJChem]

That is part of the longest carbon chain (six carbon atoms).

[@howardmabayo7923]

Oh my god. Why am I still confused 😭

[@MSJChem]

About what?

[@IBStudiesIBstudies]

@@MSJChem i love how he was like "about what huh?"