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Whenever I search for tutorial videos about Organic Chemistry and see JG here, truly my heart always finds peace because the best is explained here! Love from Papua New Guinea🇵🇬❤
I have been watching your videos since Grade 7, and now I'm preparing for my IBMYP E-Assessments in Grade 10. Thank you so much for always having my back!!
Just wanted to say that you have helped me SO much throughout Organic Chem 1 and 2, your videos are so easy to follow and I love how you give us a moment to try and solve them on our own before giving the answers with a clear explanation.
We had a topic about this last Tuesday and I can't understand anything but when I searched for alcohol nomenclature, I realized that the lesson is not hard, it's just the way of teaching. Thank you Mr. Organic Chemistry ❤
Hi guys i recently finished my biomed degree so revisiting all the resources i used lool reminiscing massive fan of khan academy.. starting my uni course in medicine if anyone want some inside info lmk more than happy to help :)
When you hear it, it sounds sooooo crisp, almost like eating chips and the sound when u crunch chips down. So..... which means it’s just you because I don’t like the sound of Chips being eaten.
It is because Methoxy is the substituent and butanol is the parent chain because it contains more carbons. Technically the parent chain is butane, but it is changed to butanol due to the -OH group. In IUPAC the substituent comes before the parent chain.
how come OH is always 1 on cycloalkanes, but depending on where it is located in a regular alkane its not always 1? Is it because theres only 2 ways to count on alkanes (left to right) but at least 6-12 ways to count on cycloalkane rings?
So in a structure consisting of an alkyl substituent, a double bond, a triple bond, a halogen substituent, a hydroxyl substituent and an alkoxy substituent all at different postions along the parent carbon chain, what will be the order of priorities when numbering the parent chain?
Pretty late reply, but, the last line is a representation of the bond between the last carbon atom to the OH group. The line may confuse you to think it's another carbon atom along with which OH is attached, but it is not So, /\/OH = Propanol, NOT Butanol /\/\/OH = Pentanol , NOT Hexanol
Methane is CH4. Methyl is CH3. Methyl is methane without a hydrogen so it can form a single bond to attach to the molecule with the remaining electron on the carbon. Ethane is C2H6. Ethyl is C2H5, or CH2CH3. Ethyl is ethane without a hydrogen so it can form a single bond to attach to the molecule with the remaining electron on the carbon. When he called it ethyl he was right.
If you have one hydroxy (-OH) group, you dont use the 'e'. For example, Butan-ol but I you have more thatn one hydroxy group, then you use and 'e' and specify the number of hydroxy groups you have by usingthe prefix di, tri, etc. before -ol. For example HO-H2C-CH2-OH would be Ethan'e'-1,2 diol.
ortho- is used when the substituent is right next to the OH- group meta- is used when the substituent is 1 carbon away from the OH- para- is used when the substituent is 2 carbons away from the OH- group (or opposite with the OH- group)
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@@s.m.rgamerz1611 I feel the same
Whenever I search for tutorial videos about Organic Chemistry and see JG here, truly my heart always finds peace because the best is explained here! Love from Papua New Guinea🇵🇬❤
I have been watching your videos since Grade 7, and now I'm preparing for my IBMYP E-Assessments in Grade 10. Thank you so much for always having my back!!
Just wanted to say that you have helped me SO much throughout Organic Chem 1 and 2, your videos are so easy to follow and I love how you give us a moment to try and solve them on our own before giving the answers with a clear explanation.
We had a topic about this last Tuesday and I can't understand anything but when I searched for alcohol nomenclature, I realized that the lesson is not hard, it's just the way of teaching. Thank you Mr. Organic Chemistry ❤
I have been Watching ur videos since i was grade 9 and now im grade 12 , THanks for helping me Through this tough years
Hi guys i recently finished my biomed degree so revisiting all the resources i used lool reminiscing massive fan of khan academy.. starting my uni course in medicine if anyone want some inside info lmk more than happy to help :)
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When you hear it, it sounds sooooo crisp, almost like eating chips and the sound when u crunch chips down. So..... which means it’s just you because I don’t like the sound of Chips being eaten.
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Thank you (Fri 18 Dec 2020, 5:21 PM)
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How to write carbinol names
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7:37 Why not 1-butanol-4-methoxy?
(I haven’t watched preceding IUPAC nomenclature vids, so apologies for a dumb question)
It is because Methoxy is the substituent and butanol is the parent chain because it contains more carbons. Technically the parent chain is butane, but it is changed to butanol due to the -OH group. In IUPAC the substituent comes before the parent chain.
how come OH is always 1 on cycloalkanes, but depending on where it is located in a regular alkane its not always 1? Is it because theres only 2 ways to count on alkanes (left to right) but at least 6-12 ways to count on cycloalkane rings?
Exactly right!
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Thank you once again.
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Can 2 propanol also be written as Propan-2-ol?
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So in a structure consisting of an alkyl substituent, a double bond, a triple bond, a halogen substituent, a hydroxyl substituent and an alkoxy substituent all at different postions along the parent carbon chain, what will be the order of priorities when numbering the parent chain?
did u find out?
@@NoraCGVK Nope
Hydroxyl takes priority, everything else is given the numbers based on giving the hydroxyl group the lowest number
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Wait, ester has a higher priority than alkyne. The 5-methoxy-2-heptyne. Why the triple bond has a higher priority over methoxy?
That’s an ether, not an ester. Ethers do not have priority over triple bonds.
In 3,4 _ hexanol what if I call it hexan-3,4-diol
It's still correct!!
Thank you🤍
So in naming ethyles and methyles do we use the one with the least number combined ??
How about the common names of cycloalkanol ?
@the organic chemistry tutor - This video is great HOWEVER - the example @ 4:30 is 5-Bromo-1-hexanol, you miscounted the carbon chain !!
No you have, the chain is only 5 carbons long.
@@rwayle Shouldn't we count the number of dots? or the segments ?
@@hfof ? you literally just count the number of carbons, he's numbered where they all are...
@@rwayle I got it by thinking about it, thanks! I wonder what score did you get 2 months ago?
@@rwayle I still don't get why it's 5 carbon chain instead of 6
4:00 why there is only 5 carbon group? isn't it 6?
Definitely only 5
OH is not a carbon so you don't count it as a carbon group
Pretty late reply, but, the last line is a representation of the bond between the last carbon atom to the OH group. The line may confuse you to think it's another carbon atom along with which OH is attached, but it is not
So,
/\/OH = Propanol, NOT Butanol
/\/\/OH = Pentanol , NOT Hexanol
@@soulfreefreak Thank you sirrr
2019?
can 2:17 be written as 2-methylpropan-2-ol
yes, 2-methylpropan-2-ol is also correct. similarly, 2-Pentanol can be written as Pentan-2-ol.
Can there be a OH and with alkanes or alkynes ?
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wait I'm confused, why was the answer of the last example not following the alphabetical arrangement?
E is before m, and ethyl comes first here. It is alphabetically ordered
Thank you😊
I have a individual report on this topic wish me luck😭
what if there is cycloalkene attached to the (OH) group how can we name it
What Is Oh Cl Oh?
Can’t the last example be 1-Ethyl-4-methylcyclohexan-2-ol?
No, because the alcohol has to be on carbon #1 when it’s a ring
why in 3:37 is 3,4-hexanediol instead of 3,4-hexanol???
Because there are 2 hydroxyl groups(OH) and we name it like "ol" and di means "2" so that's why it is hexane di ol:) I hope u get it
I do now! Thanks!
9:31 Sir can we call this 2-Ethyl-5-Methyl-Fennel if its aromatic molecule?
Phenol
In some of ur videos, CH2CH3 is methane while in this video at 8:54 u called it ethane so which one of these are correct?
It's C2H5 - Ethyl..
That is an ethyl! If you saw that maybe it was a mistake or a misunderstanding on your part.
Methane is CH4. Methyl is CH3. Methyl is methane without a hydrogen so it can form a single bond to attach to the molecule with the remaining electron on the carbon.
Ethane is C2H6. Ethyl is C2H5, or CH2CH3. Ethyl is ethane without a hydrogen so it can form a single bond to attach to the molecule with the remaining electron on the carbon.
When he called it ethyl he was right.
wait wait wait... that can't be 2-methyl-2-pentanol ? i started counting the carbon where OH is connected
oh wait nvm. i think you cant count it that way lol
Hii, why did name the tertbutyl alcohol, propanol? Should It be butanol or am I missing something here?
Rhidita Bham
Propanol is the IUPAC name. Tertbutyl alcohol is the common name
Rhidita Bham
Hi fellow Indian 😂
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how do we know when to put "e" or get rid of "e". from examples, you used pentan and hexan"e"
If you have one hydroxy (-OH) group, you dont use the 'e'. For example, Butan-ol but I you have more thatn one hydroxy group, then you use and 'e' and specify the number of hydroxy groups you have by usingthe prefix di, tri, etc. before -ol. For example HO-H2C-CH2-OH would be Ethan'e'-1,2 diol.
what about naming phenols with double bonds. I need to know ortho, meta, and para...
ortho- is used when the substituent is right next to the OH- group
meta- is used when the substituent is 1 carbon away from the OH-
para- is used when the substituent is 2 carbons away from the OH- group (or opposite with the OH- group)
Why is it cyclohexanol?
Because it's a cyclohexane ring with an alcohol group. cyclohexan ol
Choo-Choo nd in
What if there's more than one OH ?
Then it’s a diol or triol etc.
How to write carbinol names
I am confused but I know it like WTF
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