Woodward-Fieser rules for Enones | UV-Visible spectroscopy

By using Woodward-Fieser rules we can calculate λmax for conjugated enones. Just like aromatic compounds, here we can give the increment value for a group based on the position where it is attached to chromophore.
In this video, we will see how can we calculate absorption maxima for both cyclic and acyclic enones along with few examples.
#woodwardfieserrules
#uvvisiblespectroscopy
#lambdamaxcalculation

[@michellebarzalobre9010]

I was stuck on these rules and you really helped me, thank you so much!

[@egpat]

Glad it is helpful. Thanks for watching.

[@shaimaamahmoud6869]

Absolutely nice and helpful, THANKS

[@Eliana82195]

Thanks heaps for Nice explanation and clarification. Gratitude and blessings to you.

[@dilkisamarasinghe1320]

extremely perfect teaching : ) thanks alot

[@tharindudiasbandaranayaka1360]

great video. thank you so much

[@jayshreeverma6613]

Thank you 🙏
Its very help ful Video for me💫🙏🥳

[@pna_jr]

Thank you for this.

[@hizrelolaniyan7124]

Easy! Thank you

[@chaithra_01]

Thank you sir! This was very helpful.

[@egpat]

Glad it was helpful! Thanks for watching.

[@ajitmandhare7401]

sir your video highly qualatative as like reference standard

[@Likyle170]

God bless you massively

[@samarjeetsingh6818]

This was really helpful..thank u so much sir..

[@egpat]

Glad it is helpful. Thanks for watching.

[@upekshasewwandikulasekara7072]

Thank you 😊

[@nthabisengrawu706]

Very Helpful 🙏❤️

[@venessahalliday2060]

this video is a life saver

[@egpat]

Glad it is helpful. Thank you.

[@sarasayed2416]

Awesome 👍😎

[@gudipallichandrika7537]

Very good explaining tq sir

[@abishaimumachikombe7753]

This was helpful

[@sairarafiqsairi.]

Good job carry on plz👍it's worderful help materials for student

[@isharadarshani9656]

thank u very much , i understood clearly those rules...😇

[@egpat]

Most welcome

[@mamogirma3817]

thank you Sir.

[@anuj8855]

You cleared my some of doubts thank you sir 😊

[@egpat]

Glad to hear that. Thanks for watching.

[@sivarajn1930]

Super sir,please upload more videos sir,thank you sir

[@jonahepziba1445]

Thank you so much sir.....i don't how to express my thanks giving

[@gokuljaat942]

thank u

[@asrithavidyapolakam7798]

Thank you very much sir😊

[@pharma.751]

Excellent

[@vishkelum8]

Thanks

[@sudhavalluru6211]

Very nice

[@blessingibeawuchi511]

What if the enone was on the six membered rings and both the five membered ring and six membered ring had double bonds

[@bettykefelegn5925]

Its is nice

[@ayanasmusic9298]

Nice

[@Ms-zw6qz]

Thank you for the video. Why the bond attached to carbonyl carbon not considered ring residue in all the examples -C=O.

[@mominaabbasi8224]

Because wo conjugated system ky inside ni hota

[@ashanikarandawela8129]

sir,how to identify ring residues??

[@siddhibhamare527]

Thank you Sir 😊

[@egpat]

Most welcome

[@gokulramanb1491]

Thank you sir

[@egpat]

Glad you liked it. Keep watching

[@ajitmandhare7401]

thank
you
so
so
soOOOOOOooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo
much sir

[@gargidas9889]

Good explanation sir

[@egpat]

Thanks for liking

[@minhaj9802]

What about the methyl group attached to gamma for the first example, shouldn't it be 260 total then?

[@NikitaSharma-jg1mu]

Thanku well explained 🙏☺️

[@egpat]

You are welcome, thanks for watching.

[@marcjaspersombillo6392]

how about a 5-membered accyclic enone? im confused as to what base value would I use

[@maniainapure5368]

215

[@amirmalik2950]

how questions asked in gpat exam from this topic? ?

[@jamoootv6693]

Hi on 7:44 why did you use 202 instead of 215

[@mohamadhanan5706]

الف رحمة على ابيك

[@manash5525]

No increments for heterocyclic diene?

[@lensreflex5684]

What is S- trans and c-cis in enone system

[@anshupriya7339]

Well explained but you could have shared many more examples. Anyway thank you.

[@egpat]

Sure, I will upload another video with more examples. Thanks for watching.

[@Ms-zw6qz]

1. Is there a value for hetrocyclic diene in enone just like homocyclic diene?
2. Why is it only in the base value that nm symbol is used in all the calculations.
Thank you.

[@user-lk4rs2cl2f]

It is generally used for rings substituted by a certain group rather than heterocycles

[@user-lk4rs2cl2f]

I think the following is just for brevity.

[@11.ruchatiwari31]

How to know it is extended double bound..???

[@egpat]

If it contains more than two double bonds in conjugation, it indicates extended conjugation.

[@parishasingh9364]

There is a mistake @9:13 beta bromo should be 35nm

[@gargidas9889]

First comment

[@fatimafernandes3825]

Kutriya bor xikoita tum, vallor tuka, 😁

[@Likyle170]

God bless you massively