IUPAC Nomenclature of Cyclic Compounds

[@ProfessorDaveExplains]

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[@JohnyPaprikas]

These are by far the best tutorials on IUPAC nomenclature, why dont you have more views?

[@ProfessorDaveExplains]

+Rmutt gotta get the word out! please share with friends!

[@AyushKumar-nl9yd]

Rmutt bro because not even more people are familier with this channel. Today i accidently find this channel quantum no video then asap i subscribe it first and share it amap

[@naveenallam6829]

@@ProfessorDaveExplains @ what about compounds with functional groups Please explain them quickly

[@l.lawliet1551]

I guess not all dudes wanna learn cyclic compounds?

[@solomonorakwue5036]

💥🙄

[@sammyelrefee]

Just chain watched all of your IUPAC nomenclature videos. Best most comprehensive tutorials available on YT. I saw some other videos before yours and they weren't even half as comprehensive. Thank you so much! I have subscribed to you as you are excellent!!

[@ProfessorDaveExplains]

+Sammy El-Refee thanks kindly! spread the word!

[@TheRok]

Thank you for sharing this, Professor Dave. It might be worth it in another video or so, to clarify to the audience and students that the “lowest set of locants” does *not* mean the set of locants with the lowest sum, but it means the set of locants with the lowest number at the first point of difference. Meaning, in this example 2:41, we compare two sets going in opposite directions: 1,4,6 1,2,4 The set “1,2,4” wins, or is the correct one, because after we skip both 1s in the sets, as they're the same, the first point of difference is between 4 and 2 above each other; 2 is lower, so its set wins, or is the correct one to use, *even* if that set's sum is higher than another set's sum! This is very important for students to know and understand, and lots of them get it wrong when they hear the title of the rule, “lowest set of locants”.

[@ProfessorDaveExplains]

hmm, i'm wondering if these two methods could ever even yield different results in the first place?

[@TheRok]

Professor Dave Explains Yes, Professor Dave, they do yield different results sometimes. More precisely, sometimes the sum of the locants leads to the wrong answer while the lower at the first point of difference leads to the correct one. Dr. Ian Hunt, from the Department of Chemistry, University of Calgary, wrote an article about this titled *Don't sum locants!* The article lists some examples of when the sum misleads.

[@ProfessorDaveExplains]

well good stuff, thanks for the tip!

[@TheRok]

Professor Dave Explains You're most welcome. And thank you for sharing all these lectures; it helps a lot. And what I mentioned is a drop in the sea of those lectures. =)

[@vrmagics-rishan7990]

@@ProfessorDaveExplains yes prof dave they yield different results in the case of a trimethyl decane to be more precise consider this 2,7,8trimethyldecane and 3,4,9trimethyldecane and use both methods for both compounds they yield diff results but first one is considered to be correct so as ocatants rule

[@angeliemaebonaobra4448]

During my undergrad degree, best prof in youtube. Still the best, pursuing my MA degree rn.

[@rkispersky]

I SO appreciate your videos. They are top quality content. Your topics are focused and videos are just the right length. You are articulate and clear, and your examples further clarify any possible confusing circumstances that might arise in the topic you are lecturing on. Thank you, thank you, thank you!

[@jakekriller3233]

I've been searching for a video to explain IUPAC Nomenclature with multiple substituents and you sir made it clear and easy!!! definitely earned a sub

[@snekthesilverboi]

You know you're actually one of the best examples of modern teachers! I'd love to be your student! Wait I am one already! That's cool!

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Guys why does he need to shut up he did nothing wrong.

[@ammo7204]

@@pastoryoda294 I think these replies were for some other reply to this comment

[@AquaVenom-g4g]

9 years ago ... DANMMMMM

[@deograciousopolot3644]

Thanks professor. You have indeed solved all the problems I have been experiencing in organic nomenclature since I joined A level

[@lisejl]

I would not survive AP Chem without your videos!

[@Abhijay-dg1iw]

Severely underrated

[@nicolejaja270]

You always save me from my physics exams and now chemistry WOW. Thank you so much

[@lonepvn]

Sir you look like Ranbir Kapoor 😻😍❤️

[@mayhimes]

hi dave you are seriously a god, thanks so much. you taught me more in a minute then my chemistry teacher did in 2 weeks thanks man

[@ProfessorDaveExplains]

haha you're very welcome! feel free to email with questions!

[@Chay-4o]

The best tutorial to learn the IUPAC numbering for cyclic compounds> Thanks sir Dave! Love from India.

[@Paraselene_Tao]

lol, I took an undergrad O Chem class and we didn't even deal with this "lowest set of locants" rule. I think it's great that IUPAC has a way to end up with the same name every time. I'm here laughing at how my college class didn't bother to explain this, yet here you are explaining it perfectly for everyone to see on KZbin.

[@pradeepms3722]

whole world will love you sir, with lots of love from your Indian student..... thanks a lot

[@قَمَراءُ_زُحَل]

THX PROFESSOR U R ACTUALLY THE BEST !!!

[@05akanshapriya26]

Your videos make me love Science 💜

[@juliebee9519]

Thank you for the help professor jesus. I am able to pass my organic chemistry class now

[@ArunmozhivarmanNXTWAVE]

your classes are awesome and they helped me a lot, and you are one of the best teacher i know.

[@nadiasantos8383]

I love these classes!

[@MaiLe-dp4ct]

thank you so much. This is such an awesome tutorial, i like the quality (good image and clear sound).Also, it's great that you explain things in details. please do more tutorial on nomenclature for more complicated compounds. im looking for it

[@songohan393]

Amazing video, could you do one more video about IUPAC of more complex cyclos? maybe with 2 doubble bonds, 3 doubble bonds, combined with triple bonds, combined with another phenyl. Probably a video where you have already written 10 molecules and then you name it with us.

[@karinaarichabala4145]

Anyone else a college student learning more about Orgo here than in Lecture? Amazing videos!

[@ritsuafk]

You saved me during my Class 10 board exams with your first 4 videos on Organic Chemistry . Now I gonna learn Organic Chemistry of Classes 11 and 12 and for JEE from you . I am entrusting my life to you . Please save me .

[@caroljackson767]

Thank you Professor Dave! Your videos are professional and always get straight to the point.

[@mohdshujathali2752]

I can't understand why people dislike the videos when they can't understand even after watching these kinda awesome videos

[@sneha-hk2ol]

Thank you sir you are the best teacher of chemistry and you are very nice

[@liandremeuter]

Wow for the first time in years i actually understand now. A big thanks!!!!!

[@devpartap9748]

Thanks professor Dave, still helping students after 7 years.

[@ultrasoniceditz786.-]

Thank you so much proffesor Your videos are very helpful Love from India

[@chukiejulianonljkhc8776]

We have an examination tomorrow about organic chemistry and this would be a helpful channel for us who are in the 9th grade

[@MrDzoni955]

Isn't it OH? You wrote HO in previous video as well, but hydroxyl is OH right? What am I missing?

[@ProfessorDaveExplains]

You must write it so that the oxygen is connected to the main chain.

[@MrDzoni955]

@@ProfessorDaveExplains Ah, thanks. Im new to this.

[@abhaysingh7299]

professor dave , you cleared my all doubt , related to nomenclature.

[@freshmilk7122]

Yes thank you. I saved myself hours of comprehending modules.

[@razanzantout9830]

At 3:30, aren't we supposed to give ethyl the smallest possible number because when writing the name down, it comes first in the alphabet? Isn't that preferable? If I am wrong, please someone correct me. Because I know that if I have a cycloalkane with substituents, I number the substituent that comes first in the alphabet the lowest number, while also trying to give the rest of the substituents the lowest possible numbers too. I am so confused, I need help.

[@ProfessorDaveExplains]

nope, all alkyl and halogen have equal priority, so we give the lowest set of locants regardless of what the substituents are

[@razanzantout9830]

@@ProfessorDaveExplains Ah, yes I understand. But let me clarify what I meant, professor, and tell me if I am right or wrong. For 1-bromo-3-ethylcyclohexane, we don't say 3-bromo-1-ethylcyclohexane, bcz the b in bromo comes first in the alphabet (or can we, but it is preferable if we don't)?

[@ProfessorDaveExplains]

Razan Zantout oh I see, yes I believe that given two options for the same set of locants then C1 would go to the first substituent alphabetically.

[@Devrajneedstostudy]

In India we study this in grade 10th you are very helpful ❤

[@baboucarrjallow973]

I really like this professor. His teaching methods are exceptional. Thank you Sir

[@haribol6076]

thnx professor , i understood the whole nomenclature of cyclic compound , love from india

[@biswajitbiswal3080]

Good evening Sir 😊 I really glad to your tuition

[@hairglowingkyle4572]

You just saved me from my professor's surprize quiz. Thank you Chemistry Jesus

[@inahrelucio320]

Every vid of yours are worth watching professor dave. I've learned a lot here, indeed thankyousomuch! More power & Godbless. You're such a great professor! 💞

[@athickie]

Hi Prof. Dave! What determine whether the carbon chain forms a ring or not? Since the smallest ring is a 3 carbon chain, why is it that sometimes it's a straight chain and others it's a ring? Or is that just when the chain has substituents?

[@ProfessorDaveExplains]

they're just different molecules! some linear some cyclic.

[@abdulkhadarainur4348]

So we don't include the substituents in the parent chain even if they could possibly lead to longer carbon chains?

[@nelly.2319]

you are a life savior!!!!

[@tc4234]

Wow, my head is still spinning but this is by far the best example of IUPAC rules with some great examples. Since we all have to "shelter in place" for this corona virus, I'm taking an online Chem class, and the textbook gives the most basic and least complex examples. So, thank you thank you thank you for these videos. I haven't taken a chem class since high school and that was many years ago.

[@harshihash1569]

Please do video on phenyl and benzyl group nomenclatures

[@jaiprashanth4040]

i M FROM INDIA ..love the way u simplify difficult concepts

[@minimahalakshmi5984]

3:12 Is it isopropyl or isobutyl???

[@ProfessorDaveExplains]

that's an isopropyl group

[@janxli695]

Hi, I was wondering whether these nomenclatures accurate or not. 4-bromo-1-cyclohexene 3-ethyl-1-cyclopentanol

[@shalomambrose]

Best tutorials ever❤

[@ponnisk]

If alcohol group and double bonds are present In a cyclic compound, for which we should give priority to?

[@eelboy9017]

Thank you Prof Dave ! Helped me bunches =D

[@rajubhairaj50]

Who did we get isopropyl 3:07

[@Sakthivel-mr6ep]

Please explain me a lowest sum rule in 2-bromo-1-chloro-5-fluoro-3-iodo benzene

[@Ava-fx4ip]

Professor... I did't get you at 2:24!!! why didn't you mark ethyl as 1??

[@ProfessorDaveExplains]

because we need the lowest set of locants! that would be 1, 2, 4. if the ethyl carbon was 1, it would have to be 1, 3, 4 which isn't the lowest set possible.

[@mateuszrazniewski163]

@@ProfessorDaveExplains then what if all carbons from 1 to 4 had substituents? The set would be 1,2,3,4. What is the priority in such case?

[@daphnecorry974]

Seriously great stuff. You are GREAT at explaining that which has perplexed me!!

[@devwalia2481]

I love ur classes sir ,it helps me a lot thanks....

[@anonymous_yeti7279]

How do we know whether OH is a hydroxyl substituent or an alchohol functional group?

[@ProfessorDaveExplains]

It's always a hydroxyl substituent, an alcohol is a molecule with a hydroxyl substituent.

[@eshanika549]

3:24 Why do we write isopropyl instead of propyl?

[@gerald7188]

Professor dave explains from 03:32 how is it 4-ethyl

[@ProfessorDaveExplains]

the ethyl is on carbon 4!

[@ibosinger4162]

Nice human with nice information ♥️

[@shandavila]

Love you Professor Dave 🥺

[@mkky2258]

Wow, he just made chemistry sound fun

[@user-zi5fl5pp2j]

Sir, I have a doubt- For eg in 2 Bromo carbonyl-4 cyclo propoxy carbonyl cyclohexane carboxylic acid, is 'c' in cyclo propoxy also written in alphabetical order? Like b in bromo comes before c in cyclo

[@amarnathparasar5903]

Thank you sir 😊

[@sassykeyt]

Hi professor Dave. Why don’t you have a nomenclature lesson for other functionalgroups?

[@ProfessorDaveExplains]

with the rest there's just so little to explain, you just memorize a new suffix and the rest is the same.

[@sassykeyt]

I see then. I am just curious about the level of priority like in the case of hydroxy and other hydrocarbons. Say I encountered a molecule where all of the functional groups are present. Is there a hierarchy for the constituents to follow? By the way, you respond so fast. 👍🏻

[@ProfessorDaveExplains]

yep there is a hierarchy for functional group priority, most chemists don't even really have it memorized since it doesn't come up much and is easy to look up

[@fuad951357]

i can't understand , (in the 6:22) you said 3-methylcyclopentanol, why you said Pent? for the first look, it will 3-methylcyclohexane

[@ProfessorDaveExplains]

that's a five membered ring with a two carbon substituent.

[@shreeshailkanakal5612]

In one of the examples you have given.....why doesn't bromine have priority over the double bond??

[@ProfessorDaveExplains]

alkene has priority over any alkyl or halogen.

[@basilismail1179]

1:55 Isn't it still getting lowest substituent number? i.e 1 ethyl 4 Iso propyl 3 methyl cyclohexane

[@ProfessorDaveExplains]

no with cyclic compounds it's a totally different algorithm! we need the lowest set of locants. 1, 2, 4 is lower than 1, 3, 4.

[@basilismail1179]

Professor Dave Explains Thank You Sir

[@tarangdhuware4753]

Really good 🤩 Thank you ❤️

[@shivanshsaxena6548]

Love from India sir ❤

[@moalergraher8045]

Can you help me find the isomers of dibromodichlorobenzene(how many isomers do it have). Thank you.

[@shamimajafri5252]

Thank you Professor Dave

[@Nicole-ez7pm]

Just a question, for clylic compound with bromine at 4:49 Can't it be 3-bromocylohexène ? Can it be that? and if not why?

[@ProfessorDaveExplains]

the two carbons participating in the double bond must be carbons 1 and 2

[@Nicole-ez7pm]

@@ProfessorDaveExplains Oh alright then, thank you very much :D and thanks for all these free videos!!! You truly are helping millions of futur scientifists, eingeniers, doctors ect... Thank you! A thousand times THANK YOU!

[@yhtm2619]

Sir I loved your way of teaching and your hairstyle too.😊

[@RajuRaj-bl2ze]

cool videos!! SIR. Professor Dave

[@lejoub21]

the isopropryl substituent in the cyclic compound looks like isobutyl...How would you draw isobutyl in the this compounds ? Thanks. Excellent channel. Thanks

[@sisyphus645]

Isobutyl looks like a trident. It has three heads connected to one. It's like a methane molecule except replace 3 of the hydrogens with methyl groups and the 4th hydrogen with the parent chain.

[@fitsumasefa5842]

i go to class for attendance only. 10q u prof. u r skillful

[@m.megana9741]

Aah tysm I didn’t listen to class twice this week cause they were online lectures and I couldn’t understand anything-

[@qwertypoiu6156]

Professor Dave Explains For the last one why did you not put -1- before the ol? Or is it not necessary? Because you put -1- before the ol in the previous video! Thks:))

[@ProfessorDaveExplains]

on a cyclic compound the carbon that bears the hydroxyl is assumed to be carbon 1, you only need to specify on a linear alcohol

[@divyammadhok9446]

So does it mean that for e.g. propane is C3H8 but cyclopropane is C3H6?

[@ProfessorDaveExplains]

correct!

[@AronOut]

what if there is a cyclic compound branched on a cyclic compound?

[@ProfessorDaveExplains]

+Aron Balines depends on the situation! but cyclic alkanes can be named like alkyl substituents. like say, cyclopropylcyclohexane.

[@harsha7363]

Sir what if a cyclic structure have both , double and triple bond

[@Aryan_editK]

Professor, why do we have to take " 1-isopropyl" before "2-methyl"? "Methyl" comes alphabetically before "propyl".

[@ProfessorDaveExplains]

isopropyl is one of those weird ones! it's I for isopropyl rather than P for propyl.

[@Aryan_editK]

Professor Dave Explains, thank you very much!🤗😃😇

[@Papislayer69]

Could you have given the isopropyl the value of carbon 4 instead of carbon 1 ? (Ex. Minute 3.31, 4-ethly-1-isoproply-2-methly cyclohexane)

[@ProfessorDaveExplains]

+Abraham Morales nope, that would make it 1,3,4! 1+3+4 = 8 which is more than 1+2+4 = 7, so it wouldn't be the lowest set of locants.

[@MrGiri5316]

The videos are so helpful and they are very superb

[@pu55y77]

At 3:00 it could also be written as 4ethyl-1,3trimethyl cyclo hexane?

[@ProfessorDaveExplains]

nope! that's not the lowest set of locants, there are not three methyl groups, lots of reasons that's no good.

[@DebapriyaDebnath-hy3qz]

Thanks Professor Dave..... I'm from India.. Where's ur academy?

[@flaminggamer7703]

In 4-Bromocyclohexene why dont you choose the 2nd carbon as 1st and move clockwise so than you can write 3-Bromocycclohexene

[@craftideasbyniru6265]

Hey! As the double bond lies between two carbons, we have to give more priority to those 2 carbons participating in the double bond and hence carbon 1 & carbon 2. If we take 2nd carbon as 1st and move clockwise, the other carbon becomes 6 which is not possible as we have to give more priority to both the carbons. Hence, the ans is 4 bromo Hope it helps mate! 😇

[@chenni4127]

How do we know what to give prioritization to for the numbering ?

[@bryanlim7355]

7. Propose a chemical reaction that can differentiate between alkenes and alkynes. 8. Draw chemical structure of the product formed through the addition of methanamine to hexanoyl-chloride. 9. Explain why p-methyl-phenol will be more preferred than o¬-methyl-phenol as the major product in the aromatic substitution reaction of phenol and chloro-methane.

[@ProfessorDaveExplains]

contact me by email for this kind of stuff.

[@Wolf--zr2nf]

what about IUPAC nomenclature of aromatic compounds?

[@sacky2583]

Thank you so much professor dave❤

[@yarapureddy6994]

Well explained

[@rajeshannamdevula1893]

Do isomers have different physical and chemical properties? If So why sir?

[@ProfessorDaveExplains]

depends what type of isomers, structural isomers can have dramatically different properties. stereoisomers can too, it depends on the situation. usually something like a pair of enantiomers ought to have precisely identical physical properties, except for the way they rotate plane-polarized light, but certain kinds of chemical properties can be different.

[@sanskritibhalse9064]

Both bromo and hydroxy are functional groups and functional groups' suffixes are used...so why did you write 4 bromo as a prefix..?

[@ProfessorDaveExplains]

halogens do not utilize a suffix

[@sanskritibhalse9064]

@@ProfessorDaveExplains thankyou😇

[@annwn2805]

Einstein use to say if u understand the topic you would explain it in a simple way it suits you professor..... 🤗🤗🤗🤗

[@MatthewBlake-p9k]

For your example on the cyclopentanol, would it be incorrect to say "3-ethyl-1-cyclopentanol"?

[@ProfessorDaveExplains]

You don’t need the 1, it’s implied

[@MatthewBlake-p9k]

@@ProfessorDaveExplains Thank you~

[@rajeshannamdevula1893]

Sir why only organic compounds exhibit isomerism?

[@ProfessorDaveExplains]

inorganic ones can too, like coordinate covalent compounds, depending on the ligands you can have things like cis and trans isomers