Constitutional Isomers of Alkanes

[@filipamodiselle9976]

from today on,you are officially my organic lecturer away from campus... huge love from south africa!!!!!!!!

[@Leah4sci]

Happy to help!

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you are the ONLY channel i've encountered that has answered what i was particularly confused on. Thank you!

[@Leah4sci]

Glad to know it answered your confusion. Please make sure to subscribe :). You're welcome.

[@TheCrazyBunz]

thanks a million, please make more videos on naming other than alkanes and more on electron pushing and diagrams. I recommend your channel to all my classmates because THE BEST organic chem tutor on youtube

[@Leah4sci]

Oh wow thanks so much for the recommendations, that's the highest compliment I can get!

[@mamuzo1]

Thanks so much for that. I needed some questions answered and you answered them. I understand this topic now

[@Leah4sci]

You're so very welcome!

[@enomadmis]

Awesome video! I feel a lot more confident about this now. And I know how to avoid pitfalls. Thanks!

[@Leah4sci]

Yay glad to hear that!

[@btbtbts7653]

Thank you so much. You've really helped me out. So clear and thorough!

[@Leah4sci]

You're welcome, so happy I could clear things up for you!

[@chickadee584]

Helped a lot! Now I actually know a method to make the isomers! Before, I was just trying to think of them randomly, and it was a mess!

[@Leah4sci]

So happy I was able to connect the dots!

[@docremedies]

Thank you so much! I have watched all the 14 videos, and I have learnt a lot.I love the way you explain.

[@Leah4sci]

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[@eaglethornton]

You are an angel from heaven. I did not understand till now. And I have a test in 7 days.

[@Leah4sci]

Aww, thanks! Glad I could help

[@curtpiazza1688]

Wow...now I really get this! Thanx!

[@Leah4sci]

Glad I could help!

[@safikhan5572]

Nowadays text books have questions like how many constitutional isomers are possible for compounds having a molecular formula CnH2nO, how to answer that? Draw out all of them?

[@Leah4sci]

In this video, I only focus on constitutional isomers of alkanes. So to answer your question, you would first need to determine whether you had any degrees of unsaturation using the index of hydrogen deficiency, which I teach in this video: leah4sci.com/degree-of-unsaturation. The IHD will tell you if there are any pi bonds or ring structures in your compound. After that, then yes. You would need to draw out every possible structure. It’s easiest to start with those that are linear and then move on to branched structures.

[@TheCandyPixel]

i have a test tomorrow didn't knew that till now ... THAAANK YOU !!!!

[@Leah4sci]

You're welcome!

[@TheCandyPixel]

I got an A in High School... Kept learning from you all throughout university and now doing very well in life. I sincerely appreciate what you're doing! @@Leah4sci

[@elifzeynepsarcicek3828]

at 3.56 you did my next video, but i couldn't find that video anywhere.. do you mean your degree of unsaturation , hydrogen deficiency video?

[@Leah4sci]

Yes, that’s the video I was referring to. You can find it on my site at leah4sci.com/degree-of-unsaturation

[@willow1279]

Goodness! took me 12 minutes to learn what i've been try to learn for 2 weeks ,,.My teacher really confuse me in something so simple.

[@noushka309]

regina stew same here

[@Leah4sci]

So happy I could help clear it up for you!

[@jeroclaveria2842]

thanks leah you're a great help to me surviving my chemistry courses

[@Leah4sci]

You're very welcome, happy to help!

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You SAVED me. Thanks very much!

[@Leah4sci]

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[@Copedawg_340]

Same here. Thanks for the help Leah!!! :)

[@Leah4sci]

You're so very welcome!

[@katieroseninetyone]

This video has been a life saver - thank you!

[@Leah4sci]

You're very welcome :)

[@noyonbain]

Great expectation Ma'am

[@Leah4sci]

Thanks a lot

[@krissym6441]

Thanks, very helpful!

[@Leah4sci]

You're very welcome!

[@baharosman1416]

Is there a direct method to know how many isomers for a specific organic compound we have ?

[@Leah4sci]

There is a formula for finding the number of stereoisomers, but it’s not that easy or straightforward when it comes to constitutional isomers. What’s easiest is to draw out all of the possibilities, starting with the linear structures and then moving on to branched ones. You also might want to learn how to identify any degrees of unsaturation by watching my video at leah4sci.com/degree-of-unsaturation

[@yaghoubalibraheemi9357]

You are a genius and you have a special way of explaining____God bless you____Special thanks from Iraq

[@Leah4sci]

Aww thanks for your kind words, and you're welcome!

[@JupeHolmes]

Very good explanation! Thanks!

[@Leah4sci]

Glad you liked it!

[@jackysub1941]

Superb lecture...

[@Leah4sci]

Glad you liked it!

[@ahmedrazashaikh6585]

its really help me to understand many many thanks

[@Leah4sci]

You're very welcome!

[@ahmedm830]

Thank you....

[@Leah4sci]

You're welcome

[@rachelcutting5152]

Hi Leah, thank you so much for your videos! They're very helpful. One question though where you are talking about CH3CH2CH2-CH3(coming off the third carbon) being a butane, why wouldn't this be a methylpropyl? Why isn't CH3 considered a branch of a methyl group coming off the third carbon from the parent chain? Thanks for your help!

[@ayangilani]

Rachel Cutting since all the carbons are still in a continuous chain, it isn't considered a methyl group.

[@elexustrades]

Remember before you name them you want to find your parent chain the longest continuous chain of carbons. Since it is apart of the parent chain it is not considered to be a side chain.

[@Leah4sci]

Use the highlighter trick for this. If you can trace your highlighter from the first to last carbon, regardless of how many turns on the molecule, it's considered a continuous chain rather than a branch. If you have to lift your highlighter to catch a branched atom, that's a brach

[@wisteria69]

Thank you so much! This was so helpful!!!

[@Leah4sci]

You're so welcome, glad to help!

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Thanks very helpful 👍💪

[@Leah4sci]

Happy to help!

[@saakshigovalkar407]

perfectly understood.thanks

[@Leah4sci]

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thank a lot , it really help me !

[@Leah4sci]

So glad to hear that, you're welcome!

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I am from 🇮🇳🇮🇳... Fan of your teaching

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super helpful!

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Thanks

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Thank you soooooo much!!!(:

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you are good

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Thanks!

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so muh help;) thanks

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god bless you!

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I m Pakistani your lec is very good. mam

[@Leah4sci]

Glad you like it!