Degree of Unsaturation aka Index of Hydrogen Deficiency

[@dickgrayson3601]

'Don't memorise it, recognise it' - Leah Fisch.

[@Leah4sci]

:)

[@Lexyvil]

(Knowing the concept by logic) > (Memorizing and not understanding why it works). Amazing explanation!

[@Leah4sci]

I agree! Glad I could help you understand

[@OrgoMadeEasy]

Me likey the Oxygen/Nitrogen/Halogen explanation! :] The funky equation made easy! (By Leah4Sci)

[@Leah4sci]

Happy to share!

[@rehabalsaleh166]

All your lessons are amazing. Before knowing your channel, I got 76 in my chemistry midterm1. After watching your videos, I got 90 in my chemistry midterm2. I hope I will get 100 in the final :) Thank you so much Leah!

[@Leah4sci]

Wow, what a great testimony! Thanks for sharing. :)

[@DiamondMind]

I like how you say costs

[@OrgoMadeEasy]

+Leah Fisch You got the new yawker accent. ;)

[@DiamondMind]

😄

[@Leah4sci]

lol

[@janak9497]

Wow, everything makes so much more sense now. Got a totally new perspective on the whole problem! That was such a helpful video, amazingly done!

[@Leah4sci]

Glad it was helpful!

[@AdityaDeo-cg6eu]

If you are good at something never do it for free. You just proved joker that good people still exist. I am not exaggerating but you are the best teacher i have ever seen.

[@Leah4sci]

Thank you for the kind feedback. Happy to help through my videos.

[@madrabbit9007]

Great video, the books and my professor (from India being an added bonus) made zero sense on this subject but you broke it down like it was nothing! Thanks! Btw...your secret is out. By the way you said "cost" either you're a Brooklyn girl or from someplace near by. Of course I've also heard New Orleans ladies who sound exactly the same.

[@Leah4sci]

So happy to hear that my video helped you understand, and you nailed it. I live in New York!

[@hungrystudentin]

Oh. My. God. Leah you are organic chemistry Goddess.

[@Leah4sci]

:)

[@Riya-zo8nq]

How do I know if I have bonds/ rings based on the equation?

[@Leah4sci]

You can't know if a deficiency is a bond or ring, that's where you'll need additional clues to help you figure it out

[@maverick-y8p]

Thanx

[@Leah4sci]

You're welcome!

[@paingsoekhant8731]

I wish you were my professor at my university ❤😅

[@Leah4sci]

Aww thanks, but I love being able to help more people this way :)

[@MS-bg5nk]

Thank you so much ma'am. You are too good at explaining.

[@Leah4sci]

You're very welcome!

[@leeg664]

If you already had to memorize the DOU equation, can we just use that to see if the compound has any pi bonds or rings ?

[@Leah4sci]

Yes, of course. My videos are made for the purpose of giving you shortcuts and simple, logical ways for understanding equations like this, rather than just memorizing them. But at the end of the day, you should use whichever method is easiest for YOU.

[@pennysmith9791]

How does this work for a fatty acid like arachdonic which has a formula c19h31cooh. I keep getting 4.5 bonds, yet this cannot be possible. Could you please explain

[@chawsu5825]

Trying to work it out and the formula for arachnidonic acid is C20H32O2. If we are to use the formula posted above, H= 2 (20) + 2 = 42. We have 32 H atoms and I'm assuming we are ignoring the oxygens? We would have difference of 10 between the two (C20H32 and C20H42). 10/2=5 and therefore the degrees on unsaturation would be 5. Is this correct? please let me know. Thanks!

[@bakyabakya4599]

Very useful video mam ....tq so much...can you explain for degree of unsaturation in aromatic compounds?

[@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

[@ManojP847]

Whole video 👍👍

[@Leah4sci]

Glad you like it!

[@tracylor4970]

You're awesome! Thanks for the video!

[@Leah4sci]

You're so very welcome!

[@balajibreeil5530]

thank you for the explanations. it was useful

[@Leah4sci]

You're very welcome, happy to help!

[@somayaeledfawi]

Thank you very much for your video

[@Leah4sci]

You're very welcome!

[@veraobi570]

you are the best.You deserve a trophy

[@Leah4sci]

Awww thanks!

[@meriemhouche1840]

excellent!now i can memorise it easily.thank you a lot.

[@Leah4sci]

Orgo is more about learning and understanding than memorization. leah4sci.com/why-organic-chemistry-is-so-difficult/

[@amisheriff709]

thank you for your videos. they are so helpful

[@Leah4sci]

You're so welcome, happy to help!

[@curtpiazza1688]

Beautiful explanation !

[@Leah4sci]

Thank you! Glad you liked it!

[@asifahmed3102]

great video . explained every detail.

[@Leah4sci]

Glad you enjoyed it!

[@drdavidnsamba5894]

You the best

[@Leah4sci]

thanks!

[@cometoChrist]

Thank you so much!!!

[@Leah4sci]

You're very welcome!

[@thebilla6568]

YESSSS, brilliant timing *****

[@Leah4sci]

Awesome!