Hi Leah :) As a student, I really appreciate your tutorials. It would really help my study in Biochemistry. More power & Godbless!

@Leah4sci

5 ай бұрын

You're very welcome, happy to help!

Leah, One of the excellent videos on Organic Chemistry!! You have made it so simple that now i myself can explain it to anyone. You would be the best & excellent teacher!! Best of Luck! And Thanks for this beautiful Video!!

@Leah4sci

5 ай бұрын

You're so very welcome and wow, I'm so happy to hear that you really understood the topic!

i LOVE your videos. they're the only ones that make everything so much easier for me! keep up the amazing work! thank you so much!

@Leah4sci

7 жыл бұрын

Glad you like them!

Omg thank you so much!! I’ve been stuck on this for couple of days and I mastered it with you in less than 15 minutes!

@Leah4sci

2 жыл бұрын

Woohoo!!! Glad it helped!

Leah, Thank you so much for making this easy to understand! I've spent hours studying my book! I wish I had found your videos sooner.

@Leah4sci

5 ай бұрын

So glad I was able to make it easy for you to understand!

very understanding videos ... also thought I was passed the IUPAC naming sections ... but yours is the only naming for bicyclic compounds ! Thanks !

@Leah4sci

7 жыл бұрын

You're very welcome

7:37 In this point and after the trouble I went through to understand what was going on before watching this video. I realized you are a legend. Hats off to you for this simple explanation 👏👏👏👏👏👏

@Leah4sci

Жыл бұрын

Thanks so much :)

Leah , u are such an excellent online teacher, a massive massive massive thank you for all the videos,They helped me so much in my foundation learning of organic chemistry subject .Greeting all the way from Malaysia :) :D

@Leah4sci

5 ай бұрын

You're so very welcome, happy to help!

Thank you sooo much!! the color coding really helps me since i'm a visual learner :D

@Leah4sci

4 ай бұрын

Same, I love to use colors to teach and to learn!

Wow! I m learning a lot in your brief videos!

@Leah4sci

2 жыл бұрын

So happy to help!

You make Organic seem so easy! Thank you so much!

@Leah4sci

4 ай бұрын

You're very welcome, glad I can help!

You are literally saving my life! I'll have an exam soon and I did well on inorganic chem but don't understand anything when it comes to organic I thought that it was hopeless but now that i found your videos I feel there's hope! Thank you a thousand times!!

@Leah4sci

7 жыл бұрын

You are welcome a thousand times!

@AlineBooneMusic

7 жыл бұрын

You're awesome :D! I watched your nomenclature, stereochemistry and acid and bases series and now I'm learning from your substitution and elimination videos :)! Really great videos and if I know someone who is struggling too, I will recommend your channel ;)!

No words to tell how much you helped me with these.

@Leah4sci

5 ай бұрын

So glad to hear I helped!

what i learned from this video is REALLY new!!!.................thank u so much.

@Leah4sci

5 ай бұрын

You're so very welcome!

Hey, Leah we are still watching your videos in 2020. Amazing video, wonderful explainations

@Leah4sci

4 жыл бұрын

Thanks so much! Glad to hear it's helping!

Thank you so much for your clear explanation, I am very happy with your explanation❤️❤️

@Leah4sci

2 жыл бұрын

You're welcome 😊

highly useful and ultra simple. thanks for making such videos. please add videos on spiro compounds too.

@Leah4sci

6 жыл бұрын

Glad you enjoyed it

I've never seen such a wonderful explanation！ It's very helpful for my study in organic chemistry. Thank you so much：）

@Leah4sci

Жыл бұрын

So glad to hear that! You're welcome.

Thank you...this really really helped. I have shared the link with several friends.

@Leah4sci

4 ай бұрын

You're very welcome, and thanks for sharing

Leah you re just amazing at explaining organic chemistry 😭🤌❤️❤️ thank you soooooo much ❤️❤️

@Leah4sci

2 ай бұрын

Aww, you're so welcome! I'm thrilled to hear that my videos are helping you to understand!

By listing your lecture I get my concept clear

@Leah4sci

5 ай бұрын

Happy to clear things up for you!

You are a very good online tutor.

@Leah4sci

6 ай бұрын

Thanks!

Thank you so much 😊😊😊.this video help me to understand the topic easliy.

@Leah4sci

10 ай бұрын

Happy to help! You're welcome.

Thanks for helping me! 🥰🥰🥰

@Leah4sci

4 жыл бұрын

Happy to help!

the way you explained you jst nailed it maam you jst nailed ittt jst awesome

@Leah4sci

6 жыл бұрын

Thank you :)

Thank u very much U r the best tr on youtube.

@Leah4sci

6 жыл бұрын

you're welcome

YOU ARE AWESOME AF THANK YOU SO MUCH MAY YOU CONTINUE TO GUIDE US IN CHEMISTRY

@Leah4sci

5 ай бұрын

You're very welcome!

you are just awesome...i always refer to your videos...your teaching techniques are excellen!!!...thankyou

@Leah4sci

4 ай бұрын

You're very welcome!

THANKS FOR THOSE VIDEOS! Subscribed for sure! A helpful organic youtube channel. Studying for my test on Monday :(

@wispy3180

7 жыл бұрын

So hard. We had one hour and it was so long. I couldn't finish it. :(

@Leah4sci

6 ай бұрын

You're so welcome, happy to help!

excellant lectures very helpful thank u so much

@Leah4sci

6 ай бұрын

You're so very welcome!

thank you so much --you are just wonderful

@Leah4sci

5 ай бұрын

Awww, you're very welcome

You teach very well thanks you slove my confusion

@Leah4sci

6 жыл бұрын

Glad I could help!

A very nice and clear explanation thanks a lot

@Leah4sci

5 жыл бұрын

Glad the video helped! You're welcome!

Hi Leah tx so much your tutos re very helpfull .Keep going .....

@Leah4sci

4 ай бұрын

So happy to help!

That was a great vid *****! A lot of student's don't know this but I actually never learned nomenclature in college Orgo @BU, they completely skipped over it, so I've been trying to learn it on my own these past few years lol. Also I really loved the explanation @ 1:11- 2:05 for some reason. lol

@Leah4sci

5 ай бұрын

So glad to hear this helped you and that you loved the explanation!

seriously you are awesome. I wish all teachers made orgo this straight forward

@DMMBX3

9 жыл бұрын

***** lol good point.

@sucdimohamed4519

9 жыл бұрын

You are the best mwah!

@Leah4sci

5 ай бұрын

Wow, thanks so much for your kind words; I'm happy I can help!

all concept is clr from this video,thank you a lot

@Leah4sci

5 ай бұрын

You're very welcome!

Thank You! It really helped!

@Leah4sci

4 ай бұрын

Glad I could help!

Thank you so much, this video has been useful in my studies.

@Leah4sci

4 ай бұрын

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

@taifalyassiri

3 ай бұрын

You reply after 10 years!!! this comment when i was a first class student at dentistry school, now i’m dentist.. this is hilarious 😂😂

Thank you, your videos are helpful

@Leah4sci

5 ай бұрын

You're very welcome!

OMG!! You made this way more simple than my Orgo professor. He goes at warp speed and so its hard to follow!!! Thanks!! Do you have a video on conformation?

@Leah4sci

4 ай бұрын

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

really good and easy to follow

@Leah4sci

4 ай бұрын

Glad you liked it!

Literally are amazing. I have added watching your videos into my study routine per topic because of the immense value you bring. I really hope to see you making more videos in the near future. 10-CycloTHANKYOU! lol

@jorgesunti4702

2 жыл бұрын

There is not much information out there for organic chemistry, biochemistry etc. So i really do appreciate these videos. Thanks again Queen!

@Leah4sci

2 жыл бұрын

Wow, thank you! I'm so happy to help! You can find a list of my resources by topic here: leah4sci.com/syllabus

Wow! I never knew how to name 2 rings when they are fused together. I always found ways to avoid answering them in class, and they never were on the exams. Now I have at least one less thing to worry about. :P Thanks so much!

@aslpharmacy

8 жыл бұрын

I don't recall ever going over them in class which could easily mean I just fell asleep when they did.

@Leah4sci

5 ай бұрын

you're so welcome, happy to help fill in your nap blanks lol

thank you so much. I owe you for my exam. Have a nice day~

@Leah4sci

5 ай бұрын

You're welcome, so happy to help!

very very good , thank you

@Leah4sci

5 жыл бұрын

Thanks and you're welcome :)

Thank you for uploading this video. :-)

@Leah4sci

5 ай бұрын

You're very welcome!

You are amazing i'm understood to you .thank you so so much 🌸🌿👍

@Leah4sci

6 жыл бұрын

Glad I could help!

GREAT VIDEO. MAKES SO MUCH SENSE THAN MY PROFESSOR'S LECTURE

@Leah4sci

4 ай бұрын

So glad I could help!

Thank you for all the great material!! Not a big deal but at around 3:51 I believe it should be methylcyclobutane. Thanks again for all the great videos!!

@jorgesunti4702

2 жыл бұрын

I believe so too. Thank you for your comment, it verified what I was thinking!

@Leah4sci

4 ай бұрын

OMG wow good catch. You're right, I missed a few letters there. Methylcyclobutane is correct

Hello and Thank you for those great videos ☺ u help me a lot. I have a question...why should I count clockwise at the last bicyclo compound? why can't I start at the higher substitueted C atom and count Anti CLockwise ...to get 1- Isopropyl-5-Methylbicyclo (4.4.0)decan?

@Leah4sci

6 жыл бұрын

You are very welcome! I'm sorry, but I don't offer tutoring through KZread comments. For more help with naming and other orgo 1 & 2 topics, I recommend joining the orgo study hall. Full details: leah4sci.com/join

Thank you!

@Leah4sci

7 жыл бұрын

You are welcome

you are awesome....TYSM

@Leah4sci

6 ай бұрын

You're so very welcome!

there need to be a SUPER LIKE

@kusalseven3563

7 жыл бұрын

XD

@Leah4sci

5 ай бұрын

Aww thanks!

dont we number the chains in the way that the smaller alkyl or radical group gets lowest nbr? you gave ethyl lower nbr and the methyl got higher nbr

@Leah4sci

5 жыл бұрын

at which part of the video are we referring to?

thanx leah

@Leah4sci

5 ай бұрын

you're welcome!

thanks for this

@Leah4sci

6 жыл бұрын

You are very welcome!

Excellent video. Just wanted to ask in 5:19 how do I decide which gets higher priority i.e. why not start 1 from the lonely methyl group ? Is there a priority order or are we to apply ethyl being aplhabetically earlier than methyl gets 1 ?

@corybenz5667

7 жыл бұрын

If you start at the lone methyl group and number it 1, than number the ethyl and methyl group above as both 3, the name will be: 3-ethyl-1,3-dimethylcyclohexane. In comparison, by starting with both the ethyl and methyl as 1 (as leah did) and the lone methyl as 3, the name is: 1-ethyl-1,3-dimethylcyclohexane Comparing the two names: 3-ethyl-1,3-dimethylcyclohexane 1-ethyl-1,3-dimethylcyclohexane (Leah) Notice how leah's name gives a lower number (1) than the other number (3) for the ethyl group. REMEMBER: YOU WANT TO HAVE THE LOWEST NUMBER POSSIBLE FOR EACH GROUP WHEN NAMING, hence 1 is lower than 3. Also, the reason why ethyl is written before methyl is because e comes before m in the alphabet. You DON'T include: di, tri, tetra, etc. in the name when comparing which is first in the alphabet. B(utyl) before E(thyl) before M(ethyl) before P(ropyl) (carbons 1-4) Hope this helped

@Leah4sci

3 ай бұрын

As @corybenz5667 explained, the goal is to get the total lowest set of numbers for your substituents

approachable teaching thank u for that but How can I download 10 secrets...... of chemistry plzz help me ..... thank u

@Leah4sci

6 жыл бұрын

Thank you for your kind words! You can download it here: orgosecrets.com

Thank you for the explanation I am watching you from Iraq 🇮🇶♥️.

@Leah4sci

2 жыл бұрын

You're so welcome!

u are the best.thnx

@Leah4sci

5 ай бұрын

You're very welcome!

tomorrow is our exam in org chem gahhh thanks for your helpful video 😊

@Leah4sci

5 ай бұрын

You're very welcome, happy to help!

Is it only "isopropyl" which is an exception? or is any other substituent with 'iso' is an exception?

@aqeelsonu

9 жыл бұрын

at 9:47

@diemdinh73

8 жыл бұрын

+shaik aqeel you can have isopropyl and isobutyl

@GravisTKD

8 жыл бұрын

The other "common name" butyl substituents will be treated in the same way -- so "secbutyl" and "tertbutyl" will be treated as if they begin with "S" and "T", respectively, for the purposes of alphabetizing. I realize you wrote this question a long time ago, so you may have learned this a long time ago. But I wanted to make sure to answer, just in case :)

5:23 can I just write 1-ethylmethyl-3-methyl-cyclyohexane or would that be wrong?

@Leah4sci

3 жыл бұрын

That would be incorrect. The IUPAC rules dictate that we name similar substituents together, along with a prefix to denote how many of those substituents are present on the molecule. In this case, the two methyl groups get named as “dimethyl” with the locants of those two methyl groups listed in front. Hope this helps!

hi! great videos, really helping me understand organic chem! i have a question though... when writing the # of carbons on each side of the ring for a bicycloalkane, in BRACKETS [2, 2, 1] for example. Whats the order in the brackets? is it right, left, bridge, or left, right, bridge? or left, bridge, right? thanks!

@boluwatifeakande2509

Жыл бұрын

I know this won’t mean anything rn cause it’s been like 9 years since this comment but She stated that when numbering you start from the ring that has the highest number of exclusive carbons

@Leah4sci

4 ай бұрын

thank you!

Thank you

@Leah4sci

5 жыл бұрын

You're welcome!

could you explain for me? why write number 1 to 10 from right to left ?

@vijayasgulalakayi2623

5 жыл бұрын

tri bui Because , the priority is given to heavy functional grp , which is on rgt cyclic compound

@Leah4sci

4 ай бұрын

Functional group priority determines the direction for numbering

I am confused on how you numbered the carbon atoms @4:25. Can I go the other way around by starting from the bottom (with an attached C atom as 1-methyl) as my carbon 1? Please help me. Thanks a lot. :D

@corybenz5667

7 жыл бұрын

If you start at the lone methyl group and number it 1, than number the ethyl and methyl group above as both 3, the name will be: 3-ethyl-1,3-dimethylcyclohexane. In comparison, by starting with both the ethyl and methyl as 1 (as leah did) and the lone methyl as 3, the name is: 1-ethyl-1,3-dimethylcyclohexane Comparing the two names: 3-ethyl-1,3-dimethylcyclohexane (Your suggestion) 1-ethyl-1,3-dimethylcyclohexane (Leah) Notice how leah's name gives a lower number (1) than the other number (3) for the ethyl group. REMEMBER: YOU WANT TO HAVE THE LOWEST NUMBER POSSIBLE FOR EACH GROUP WHEN NAMING THE CARBON CHAIN. That is why leah started numbering at the ethyl and methyl group rather than the lone methyl group.

@nikkaobenario436

7 жыл бұрын

Thank you so much! I really appreciate your effort.

@Leah4sci

Ай бұрын

Your goal is to have the total lowest set of numbers, if you start at the bottom you'll get 1, 3 and 3. But the way I counted you get 1, 1, 3 for a total lower set

THANK YOU.

@Leah4sci

4 ай бұрын

You're very welcome!

manythanks 😍😍😍😍😍👏👏👏👏👏👏

@Leah4sci

5 жыл бұрын

You're welcome.

Thank you agin and again and again

@Leah4sci

5 ай бұрын

You're welcome!

9:47 - how do you know if it's a 3-isopropyl or 3-(ethyl Methyl?)

@whiteninjaooo

7 жыл бұрын

iso means that 1 of the 3 carbons which make propyl have 2 methyls on it. this is something u will just have to memorize, as it doesnt follow the IUPAC rules.

@Leah4sci

4 ай бұрын

If you meant 3-(methylethyl) then the answer is both. isopropyl is a common name for the methylethyl substituent

Thanks!

@Leah4sci

5 ай бұрын

You're welcome!

hi...i am 12th student...i love your method....

@Leah4sci

4 ай бұрын

thank you!

thank 4 you sooooooooooooo much

@Leah4sci

4 ай бұрын

You're very welcome!

In 4:13, I don't think that it is a ring because it is not the longest change because you can get 8 carbons instead of 6. Am I wrong? Pls tell me. Help would be appreciated as I don't want to repeat this mistake again in my upcoming exam.

@Leah4sci

3 жыл бұрын

You've asked a good question. This is a ring at 4:13, and it is treated as a parent chain of 6 carbons. When numbering our parent chain, we do not transition from alkyl groups into the ring itself. Either the ring is the parent chain, or if you have an alkyl group with a greater number of carbons than the ring itself, that alkyl group can be used as the primary parent chain. In this case, the longest alkyl group is 2 carbons, so we treat it as a substituent.

@maxnguyen3503

3 жыл бұрын

@@Leah4sci OK thanks! :D

This video make "excess senses" ,thanks a lot

@Leah4sci

6 жыл бұрын

Too funny! You're welcome

thx u very very much

@Leah4sci

4 ай бұрын

You're so welcome!

AAaahhhhh My head is gonna explode, but with happiness, got a little Lizzie McGuire dancing in my head. The tips to draw the byciclo helped me a lot. you would pee your pants with the one that I tried to draw myself before this tutorial. Thank you sooo much.!!!

@Leah4sci

5 ай бұрын

lol, so happy to help! And I love how descriptive your writing is :)

I am confused in last example, how come 3-isopropyl there?????

@Leah4sci

5 жыл бұрын

At which part of the video please?

Thank you very muchh .... =)

@Leah4sci

4 ай бұрын

You're very welcome!

@9:58 , u wrote isopropyl first and then methyl U have considered on the basis of alphabet or numbers??????

@Leah4sci

7 ай бұрын

Alphabet. i comes before m

thanks miss.

@Leah4sci

5 ай бұрын

You're welcome!

Can we name 1-ethyl-1,3-dimethylcyclohexane as 1-sec-butyl 3-methyl cyclohexane?

@syedumair3172

9 жыл бұрын

At 4:55

@diemdinh73

8 жыл бұрын

+Syed Umair the two equations you wrote is not interchangeable

@zibzabzoo100

7 жыл бұрын

i thought that as well?? i am 95% sure that is correct unless there is a weird rule

how to draw trycyclo structure form its IUPAC name ??

@Leah4sci

6 жыл бұрын

I'm sorry, but I don't offer tutoring over KZread comments. For more help with this, I recommend joining the orgo study hall. Full details: leah4sci.com/join

3:51 shouldnt it be methycyclobutane?

Awesome

@Leah4sci

2 жыл бұрын

thanks

alright, thankyou! :D

@Leah4sci

4 ай бұрын

You're welcome!

Thank you so much ...I have Organic Final this Upcoming Monday .......:'(

@Leah4sci

7 жыл бұрын

You're welcome! I hope it went well!

your good

@Leah4sci

5 ай бұрын

thanks

Best

@Leah4sci

6 ай бұрын

Thanks

@3:51 you wrote methyclobutane, I think you meant to write methylcyclobutane lol

@Leah4sci

4 ай бұрын

oops, you're right! thank you for pointing that out.

Where is spiro nomenclature???

@Leah4sci

5 жыл бұрын

Do you mean my video? Haven't created one on it yet

Wooow ☺️

@Leah4sci

2 жыл бұрын

:)

Haha it aint free..so cdnt join..nyways grt tutorial..plz post as many as free vdos..so.that we can learn ...:)

@Leah4sci

4 ай бұрын

Will do!

WOW......:D

@Leah4sci

7 жыл бұрын

Glad you enjoyed it!

109k views but only 1.1k likes why people are that much disgusting

@Leah4sci

7 ай бұрын

Perhaps they're too busy practicing to hit the like button?

You are too fast

@Leah4sci

Жыл бұрын

If the video goes too quickly for you, you can always change the playback speed under settings. :)

You are a very good online tutor.

@Leah4sci

6 ай бұрын

Thank you!