Naming Branched Substituents isopropyl tert butyl isobutyl and more

[@callistusacheampongsarkodi4095]

This has been here for ten years and just today I have easily understood it May God bless you

[@Leah4sci]

Glad it was here waiting for you when you needed it :)

[@carlywaldron3008]

You are wonderful! My professor went over this so fast and the book was no help. Seeing it all drawn out and named one by one was awesome. Thank you!

[@Leah4sci]

So happy I could break it down and clear things up for you!

[@tajudeenadedotun242]

I was almost in tears as I have watched almost all videos on youtube about this topic and it just seemed like it wasn't meant for me to know..i watched this video multiple times and it just clicked...thank you so much..you just literally saved my life!!

[@Leah4sci]

I'm so glad I could help!

[@Anuragyadavhand]

Really this video is love ❤

[@bhargavvyas36]

thank you so much...all my confusions are cleared....tomorrow is my exam so useful for procrastinators like me!!

[@Leah4sci]

You're very welcome, so happy to clear things up for you!

[@JasonSteve-w3c]

@@Leah4sci that was a fast reply wow

[@Comfystudies-cv9lj]

Lmao​@@JasonSteve-w3c

[@MohamadEzaedi]

How hard is it to give such a slightly confusing topic in easy ways to understand? Like this video is a treasure, ive watched multiple videos and I just understood it from this singular video. Why is this video not the first one that pops up when I search for this. You are a true gem and you have thanked me so much, thank you ❤

[@twilightangel58]

thank you so much for this. I am a very visually oriented learner and and these step by step tutorials are a godsend. My professor just lists extremely long and wordy lists of rules and reads them and never does any examples just showed molecules with the names on his slide. I want to truly thank you from the bottom of my heart for your hard work. I hope you receive much compensation from you tube ads from me as i watch all your videos multiple times.

[@Leah4sci]

You're so welcome, happy to help! I personally also learn better from videos, which is why I like to teach this way.

[@tiffanychannelvaradi7426]

Thanks so much for your tips and tricks! They've really helped me understand and memorize isopropyl, isobutyl, tertbutyl, and secbutyl. :-)

[@Leah4sci]

So glad I could help, you're welcome!

[@iliafirpo9973]

I'm an OChem tutor looking through the videos for a way to simplify the explanations for the students, and this is the best video I've seen.

[@marzzz6727]

espanol porfador :)

[@marzzz6727]

por favor

[@Leah4sci]

Thanks so much!

[@KiranTheKnitter]

really helpful!!

[@Leah4sci]

happy to help!

[@IntuitiveRabbit]

At 2:47 -- I am confused, why do we name the methyl first before the ethyl? Does it not follow the alphabetical rule?

[@privateincognita71]

Ethyl is the parent chain

[@christianperez910]

@@privateincognita71 6 years later hahaha

[@ihateiris3878]

@@christianperez910 better late than never ..i suppose

[@Leah4sci]

when dealing with separate substituents, alphabetical order puts ethyl before methyl. However, when dealing with a substituent ON another substituent, you have to name the sub before the parent. When methyl is ON ethyl, you name it (1-methylethyl) to show that methyl is ON ethyl at position 1

[@shubhgajjar6251]

awesome !!!!!! seriously amazing way to explain organic chemistry , hats off to your knowledge aand way of explanation. i will show this videos to my friends.

[@shubhgajjar6251]

problem that's due to your knowledge.

[@Leah4sci]

Thanks for sharing and so happy to help!

[@Drea1239232]

That DEFINITELY helped me!!! My textbook didn't even explain it this in depth. Thanks Leah!

[@Leah4sci]

You're very welcome!

[@amansinghbhadauria2818]

i'm in class 10th our syllabus don't reach that things yet but i understand with this amazingly explained video, thanks for peoples like u who are spreading knowledge for free

[@eshitasrivastava4154]

omg, same... 10th grader, "exploring" youtube for some study channelsss.......... 5 years gone since you posted this comment but the video is still the same! reallyyyyy helpfulll

[@Leah4sci]

You're so very welcome!

[@amansinghbhadauria2818]

@@Leah4sci I'm a Software Engineer now 😄

[@leanxious]

I’ve been confused about this for the longest time. Thanks for clarifying things!

[@Leah4sci]

You're welcome, I'm happy to help!

[@adrienneharden5957]

You are so helpful! your videos are my favorite out of all the tutorials and you explain the details so well when my textbooks and professor may not. Forget any negativity that idiots comment, you are a brilliant educator. Thank you

[@Leah4sci]

Thanks so much for your kind words and you're very welcome!

[@OmarAhmed-wp2uk]

Let me say that this illustating video is the best video I've ever watched dealing with the common name issue. Thanks alot!

[@Leah4sci]

You're so very welcome, glad you liked it!

[@ynna41222]

URE MY SAVIOR!! i was really confused on the isopropyl and secbutyl part BUT OML u clarified it afterwards 😭♥ i started thinking if u had read my mind 11 yrs ago upon this comment xd

[@Leah4sci]

I was thinking WAY ahead lol, seriously, I'm so glad to hear how much this has helped you!

[@ssdadsad3913]

We shouldn't pay our school tuition, since we can learn all the concepts from youtube.....

[@Leah4sci]

lol

[@benedictsila9084]

best prof have had so far...great work Leah thank you.

[@Leah4sci]

You're very welcome!

[@tabrezahmed1000]

Hi i have a question, can we name the compound at 4:16 as 4-(2-methylpropyl)decane? Because in the substituent we can have longest chain as 3 carbon atoms or can we? Please help

[@Leah4sci]

The substituent chain must start at the carbon attached to the parent chain. This means you cannot have a propyl due to the middle of the prop connecting the sub to the parent.

[@ahmadabdullah8168]

These lectures are O......M.......G!!! And for free 😃😃😀😀😀... Thanks very much, leah!!!

[@Leah4sci]

Glad you like them!

[@wannabe771]

I have a question about the example that starts at 2:00. Why wouldn't that molecule be 5-ethyl-2-methyloctane? If you start from the left of the molecule and curve down, that also gives you a parent chain of 8-> octane. But this gives you 2 substituents rather than 1 like you have. Isn't the rule choose the parent that will give you the most substituents??

[@kerrigangafford8498]

The parent chain she shows is the ONLY one that gives you 8 octane

[@janettebustos8001]

The common naming finally makes sense, I wish I would have watched this video before but at least I watched it on time for the final :)

[@Leah4sci]

Yay, so happy I could help for your final!

[@nikhitakartha7525]

OMG!!... I'm so glad i clicked on this playlist.... Thank you so much Leah... you really made it easy...

[@Leah4sci]

Glad it was helpful!

[@jeraldinenavarro9458]

Thank you! I was really worried about my exam, but you explained it so good. i'm glad i found you

[@Leah4sci]

Awesome! How do you feel about your exam now?

[@lishabhat]

thank you so much i have a chem exam tomorrow and was struggling with it.Tq soo much

[@Leah4sci]

You're welcome, best wishes with your exam tomorrow!

[@angelaortiz7548]

Love your videos! These videos are helping me get through organic chemistry. Thank you!

[@Leah4sci]

You're very welcome!

[@AwaisKhan-mh6cd]

i always found iso , sec and tert alkanes so annoyingly confusing but now this is easy thanks alot

[@Leah4sci]

Happy to help! You're welcome.

[@dharshinimax8448]

My exams are really closer and found ur video very useful, thank u so much.

[@Leah4sci]

Happy to help

[@Justbreathe-h2j]

Example at 7:32 why didn't we say 2,2-dimethylpropyl instead of 1,1-dimethylethyl ?

[@Leah4sci]

2,2-dimethylpropyl would imply two carbons branching off of a three-carbon chain for a total of five carbons. That is not what we see drawn here. We see a total of four carbons in this substituent group.

[@Shreyaraman2005]

9:18 In this example, can we not name the substituent as secpropyl? Since the carbon connected to the parent chain is coneected to two other carbon atoms?

[@Leah4sci]

The smallest "sec" substituent that we commonly name is "sec-butyl". With this being said, a "sec-propyl" would look exactly the same as an "isopropyl" group. It's just that isopropyl is typically the preferred name.

[@jawadawan5497]

it's amazing...you really made my day....you are an exellent teacher...TYSM

[@Leah4sci]

Aww thanks, happy to help!

[@rania9912r]

When naming a long channel that contains isopropyl and methyl , in order alphabetical do we take Iso as ( i) or propyl ( p) ??

[@tatahchi4545]

Isopropyl will be i

[@Leah4sci]

you count the i in iso making it precede the m in methyl

[@dharshinia9378]

Thanks alot ...have been crushing my head for the past 4 hours

[@Leah4sci]

You're welcome, but no head crushing! You need your head ;)

[@blesapshtewan6024]

Thanks for sharing that information, I never see in my life but,you are best teacher for me.🌸🌸🌸🌸🌸🌸

[@Leah4sci]

Wow, thank you! You are very welcome!

[@jannyoh]

at 2:55, how did you that the branch chain had a methyl and ethyl? why not both ethyl or both methyl? do you get to choose which ends to place carbons or methyls??

[@Leah4sci]

The branched substituent on C4 is more commonly known as an isopropyl group. It is not a straight chain. Rather, it is a group of two carbons (an ethyl) with another single carbon (a methyl) further branching off of it. That's why we systematically call it "1-methylethyl". That means an ethyl group with an extra carbon coming off of the first carbon of the ethyl.

[@hayderbioideas7128]

If there’s 2 groups of -(2-methyl propyl) on the main chain? How to name ?

[@Leah4sci]

I'm sorry, but I don't offer tutoring through KZbin comments. For help with this and more, I recommend joining the organic chemistry study hall. Full details: leah4sci.com/join

[@taqi14]

Thank you so much Leah ...this helped me understand the concept much better..Thanks a ton once again 😊

[@Leah4sci]

You're very welcome, so glad I could help!

[@ibrahimmalki150]

Thank you so much for this video, it was very helpful. I have a question tho. If I have a chain with tertbutyl and another substituent, how would I alphabetize it? Does it matter if I use tertbutyl or 1,1-dimethylethyl? I know that you’re supposed to ignore the tert prefix but that’s it

[@Leah4sci]

I'm sorry, but I don't offer tutoring over social media . For help with questions like this and more, I recommend joining the organic chemistry study hall. Details: leah4sci.com/join or contact me through my website leah4sci.com/contact/

[@20AY11]

You are Amazing Leah thanks a lot I learned from u in few mins comparing to my teacher in a whole month !!!

[@Leah4sci]

Awesome, so glad to help!

[@LuckieCharmz93]

Extremely helpful!! Explained everything really well and it was so easy to follow and understand! Thank you so much!!

[@Leah4sci]

You're so very welcome, I'm glad you found it easy to understand, that's my goal!

[@pashacele1439]

thank you sooooo much...your videos are straight to the point yet full of information ..you truly doing a great job with these videos...God bless!!!!

[@Leah4sci]

Glad you enjoy them! You are very welcome :)

[@richnique4112]

finally simple color and detail explaination. very helpful! plus more than 1 example

[@Leah4sci]

Glad you liked it!

[@Comfystudies-cv9lj]

Thank you soo much for this! I was struggling in this concept, but now its clear :)

[@Leah4sci]

So glad it helped!

[@agent-sz2qj]

good video, now organic chemistry is a little less scary lol, thank's a lot

[@Leah4sci]

You're so welcome, happy to help you get rid of some of the fear!

[@augustinevanexmsukwa2211]

great work madam. i has help me a lot during exams of organic chemistry

[@Leah4sci]

So happy to help!

[@BuutjeT]

Leah you truly made my day. Thnx!!

[@Leah4sci]

You're welcome!

[@akshayaa2923]

I am unable to download your ebook from your website . Please help me out. By the way thank you so much for very clear explanation of the topic.

[@Leah4sci]

You're welcome! I'm sorry you're having trouble with the download. Please contact me through my website at Leah4sci.com/contact for assistance.

[@pihuu25]

Thanks, it helped a lot! Fr you only deserve a bigg WOOWW❤😊

[@Leah4sci]

You're so very welcome, glad it helped!

[@bucknm6798]

I will pass organic chemistry with you dear Dr Allah blessed you ❤ From kurdistan 🙋🏻‍♂️

[@Leah4sci]

So happy to help (but not a doctor)

[@bucknm6798]

I hope you will be, you explained like a professor 🙏🏼

[@bobcan4248]

would the substituent at 1:44 not be isobutyl ?

[@Leah4sci]

Yes, as explained later in the video

[@Lexyvil]

So a "substituent" is a synonym for branch in Organic Chemistry?

[@Leah4sci]

kinda. Something coming off the chain is typically called a substituent

[@shruthinarayanan9231]

such clear explanation. Thank you for clearing all my doubts!!

[@Leah4sci]

Happy to help!

[@adisomstreamiiyear3533]

At 3:07 in the video when u have 4-(1-methylethyl) Octane, i thought because of alphabetical order it would be 4-(ethyl-1-methyl) Octane.

[@allensmith342]

Same confusion here. In an earlier video she said to arrange the constituents in alphabetical order ignoring the "tri." Now the priority has apparently changed without explanation. If you figured this out, any help would be appreciated.

[@alexswarbrick984]

She's right in the video. It should be 1-methylethyl. The main substituent chain is the ethyl as it is the longer chain and thus goes as the suffix. The prefix is the methyl as it branches off from the main ethyl 'backbone' so to speak. Just as you have the isopropyl group branching off from the octane, if you zoom in on this part of the molecule you have methyl branching from the ethyl part of this chain. Hopefully this helps anyone who's a little unsure.

[@Leah4sci]

alphabetical order applies to multiple substituents. However in a situation like this when you have a substituent ON a substituent, you have to name it as 'sub on parent' in this case it's ethyl ON methyl

[@g.davidtenenbaum8563]

I echo all the positive vibes on this post. You make ORGO understandable, challenging and dare I say it, even fun. Question. On the example with the answer: 4-(1-methylethyl) I was under the impression that 1 is considered the default if no number is stated. If so, is it necessary to have 1 in the answer? Also, why is methylethyl not in alphabetical order? Thank you again for a great series of ORGO videos.

[@Leah4sci]

Thanks so much for your kind words. And YES! to orgo being fun!!! These are excellent questions! It’s always better to include more information than less. 1 would be considered the default in the case of having a priority functional group on carbon 1 of the parent chain. However, when naming these branched chain substituents, it’s the standard to include that 1. Secondly, the reason that methyl is stated before ethyl is because the methyl is a branch off of the ethyl. It’s a ‘substituent off of a substituent’. And substituents are always named in front of their parent chain.

[@jigyashusingh3362]

@@Leah4sci 👍❤️

[@jeremysakala3]

COOL STAFF ........I AM DOING MY ORG CH IN FRENCH AND THIS COURS HELP ME TO BE ABREST

[@Leah4sci]

So happy I could help!

[@gabrielmakoi3905]

I love your way of doing it. Thank you ma’am

[@Leah4sci]

You're very welcome!

[@AllenNguyen-f3r]

For the first example, could the 2-methylpropyl be named isobutyl instead?

[@Leah4sci]

Yes, correct. Isobutyl would be the common way of naming this substituent. 2-methylpropyl follows IUPAC rules of nomenclature.

[@vainokangwiya6320]

Just a little bit concerned.. On your 2nd example the parent chain was it not supposed to be heptane because it has more substituents 🤔

[@Leah4sci]

At which specific point in the video?

[@bhanupartapyadav3035]

truly helpful>>>>makes it more easier to understand>>>

[@bhanupartapyadav3035]

:)

[@Leah4sci]

Happy to help!

[@abbyhoughton5711]

SO INCREDIBLY HELPFUL! Thank you!

[@Leah4sci]

You're welcome, happy to help!

[@dhirajpandey7510]

Good explanation I want to know which software you are using for making such a wonderful videos please reply me 🙏

[@Leah4sci]

Thanks! Let's keep the comments relevant to the video topic please.

[@rrjoshi6442]

You have made this simpler for us ☺️

[@Leah4sci]

Wow, so glad to hear that! Thanks for watching.

[@bluemoon6139]

9:17 why 4-isopropyloctane ? . why not 4-secpropyloctane? . the first carbone is attache with 2 carbones .

[@bluemoon6139]

hhhhhh ok thinks .

[@siradasirasuk6596]

Excuse me, I really confused between dimethylethyl group and tert-butyl group. What is the difference of them?

[@Leah4sci]

Sorry for your confusion! There is no difference between a “1,1-dimethylethyl” group and a “tert-butyl” group. They are the same thing structurally. But, one is named using the IUPAC system, and the other is named using a common prefix.

[@capliceatta5146]

You make this so simple…wow 😊

[@Leah4sci]

So glad to hear I'm helping you understand!

[@nepheshr5265]

in exercise 1, why in the substituent just 3 carbons instead of 4? It looks like there are 4 carbons more. Can you please, answer me? thank you

[@Leah4sci]

The substituent in Exercise 1 does have 4 carbons. You are correct to say that. However, because it is a branched substituent, it cannot be named as a straight-chain butyl group. Rather, we named it as "2-methylpropyl" where a methyl group is branching off the second carbon of a three carbon chain.

[@arthurbarre7691]

how can people give a dislike to this video ?! Is there even a single reason...

[@Leah4sci]

Thank you for your kind words

[@NaijaGail]

Thanks Leah helped a lot! Finally understand this!

[@Leah4sci]

You're very welcome!

[@mathewogechi3240]

Thank you so much for this Leah you're such a help

[@Leah4sci]

You're so welcome!

[@andressandovalibarra2953]

Thx. I was really confused with isobutyl and Isopropyl.

[@Leah4sci]

You're welcome! So happy to help!

[@phucvantran4089]

Thanks . Happy Holidays .

[@Leah4sci]

You're welcome and happy holidays to you, too!

[@Killia0316]

Why does the second example (the 1-methylethyl ) not follow the alphabetization?

[@Leah4sci]

We are not looking at two substituents in this case. The methyl is on the ethyl and so we name the substituent of the substituent first

[@Natty_red]

Your amazing. You make it so easy to understand.

[@Leah4sci]

Glad to hear that!

[@Ali-jj9zg]

Thank you so much, now nomenclature is clear

[@Leah4sci]

You're very much welcome! :)

[@SelloSenyatsiC]

What a Light I see Now..Thanx

[@Leah4sci]

You're so welcome!

[@em5239]

Why is it 4-(1-methylethyl) octane and not 4-(1-ethylmethyl) octane. Does the alphabetical rule not apply here?

[@magemaste259]

+elizabeth mccandless It's like this because like she said in the video, you need to treat the substituent coming off of the main carbon branch sort of like a separate molecule in order to name it correctly. If you look at the substituent in the example you are talking about, it's longest carbon chain is 2, so the "main chain" is ethane but we say ethyl because it is technically a substituent and not the actual main chain. And then any branch off this main ethyl chain of the substituent is placed before this ethyl, follow the proper alphabetical rule. It is the same reason why methyl hexane is not hexane methyl except this is applied to a substituent

[@Leah4sci]

Alphabetical order applies when you're looking at multiple substituents. However in this case the substituent has an ethyl parent chain with the ethyl ON the methyl. This means the methyl sub comes before the 'parent' ethyl giving you 1-methylethyl (C1 on ethyl has a methyl)

[@aidaelhamian7309]

thank you so much it was awesome before i was very confused

[@Leah4sci]

You're welcome, so glad I could help!

[@israshalim9111]

Watched it in 2024 and it was really helpful. Thank you

[@Leah4sci]

Great to hear, I'm happy it's helped you!

[@margretmanda8382]

Resend the link of the book please

[@Leah4sci]

If you're having trouble accessing the book at leah4sci.com/orgo-ebook/, make sure to email me through my site at Leah4sci.com/contact.

[@monroemusicnz]

Awesome, Leah, thank you! :)) (How could anyone not "like" this? Idiots must traverse KZbin disliking random stuff....)

[@Leah4sci]

Too funny! You are very welcome!

[@donnaespadas2953]

Thank you for such detailed examples!

[@Leah4sci]

You're welcome! :)

[@hadeerrashad5486]

Thank u very much all my confusions are cleared!!!

[@Leah4sci]

You're welcome! Glad to help! :)

[@ppezamri]

Very instructive, thanks Leah!

[@Leah4sci]

you're welcome!

[@abhishekpanchal5003]

Can we write 1,1 dimethyl propyl as 2methyl butyl?

[@Leah4sci]

At which specific point in the video?

[@Robinrobin1610]

Please make the naming videos for aromatic complex compounds 😊

[@Leah4sci]

Thanks for the recommendation. I post free videos as I have time and am always looking for suggestions. For more help with this topic in the meantime, contact me through my website: leah4sci.com/contact

[@angel.6110]

I UNDERSTOOD EVERYTHING!!! TYSM.

[@Leah4sci]

woohoo!!! You're so very welcome!

[@nurulhuda5018]

Thank you very much for your good teaching.

[@Leah4sci]

You are so welcome!

[@AjayNimah-jy9yc]

Hi Can i name the secbutyl -isobutyl

[@Leah4sci]

No, secbutyl and isobutyl are two different substituents. You can see them drawn separately on the screen around 7:00. Each group has a different branching pattern, and therefore should be named differently. For more Naming practice and resources, make sure to see my Naming tutorial series and cheat sheet at Leah4sci.com/Naming

[@siddharthughade53]

this video helped me very much thank you!!!!!

[@Leah4sci]

You're very welcome, happy I could help!

[@kwabenaapeaningisaac]

Thank you so much,, you made it easy to grasp.

[@Leah4sci]

You're very welcome. So glad to hear that!

[@dajungkim]

This was SO helpful!!

[@Leah4sci]

Glad to hear it!

[@nickylove9030]

omg she's the boom. she did a great job explaining. my professor suck. when he teaches i be like WTF is he talking about.

[@Jws1028]

hahahaha True hahahahahaha

[@Leah4sci]

So happy to help and thanks for your kind words!

[@deepanshuadhikari4724]

why we dont call isopropyl alcohol as sec butyl alcohol

[@Leah4sci]

prop = 3 and butyl = 4. how many carbons in your molecule?

[@linchen910]

Thank you Leah! very helpful

[@Leah4sci]

You're welcome, I'm happy to help!

[@carljhonson9958]

Love u mam love u r the best teacher in the entire.....

[@Leah4sci]

Glad you think so!

[@carljhonson9958]

Leah4sci thanks for reply thanks alot mam you teach free of cost thank you so u deserve most respect......

[@habeebalfalah1887]

THANK YOU SMMMM THIS WAS VERY HELPFULLL

[@Leah4sci]

You're so welcome!

[@vilmajames7650]

Thank you so much this was explained so well.

[@Leah4sci]

Glad you liked it, thanks for watching!

[@Kid82fy]

Isn't the second one isopropyl? And the first butyl?

[@egabibov]

I got tripped up on this as well. You have to consider all the carbons in the substituent group. Therefore if a substituent contains 4 carbons in whatever conformation it is a butyl, you then identify weather its sec, ISO, or tert based on the orientation of carbons within the substituent. Don't count the R carbon of the parent chain.

[@Leah4sci]

exactly

[@Montathar0]

*Really Helpful!* *Thank you from Iraq!*

[@Leah4sci]

You're welcome!