The Significance of the Boat and Twist-Boat Conformers of Cyclohexane

[@kareemjeiroudi1964]

I was having a difficulty immagining the twist confermation in a 3-dimensional shape. So thanks!

[@swiftblade168]

The newman projection really helped me understand this

[@KunalPareek-bo3sx]

The explanation was so good , nothing unnecessary and completely understandable, thanks for the great explanation.

[@ChemSurvival]

Hi Abhishek! We do call that transition state between chair and boat the 'half-chair' conformation. I call it a transition state because it is a state which is at an energetic maximum (not minimum), so it only exists for an instant during the transition from chair to twist-boat. We do not use the term 'half-boat' conformation, because it would be exactly the same as the 'half-chair'! Thanks for the insightful question, maybe when I have time I will make it into a video!

[@Taypha1914]

Thank You so much. I couldn't really visualize the twist boat in my head till now

[@AHalo2019]

Thanks sir from 🇮🇳

[@akshatjindal1508]

Thanks for the amazing explanation and visualization. Helped to clearly visualize the order of interconversion. Thanks!!🙂

[@ChemSurvival]

So glad this helped!

[@lucaslopez2091]

Many Thanks!! I was able to understand it perfectly! I'd been playing for an hour with my modeling software trying to understand how exactly the molecule folds to achieve twist boat and your explanation helped me understand it immediately

[@7princu]

Thanks for explaining the remaining conformers.They were really helpful.

[@astutilko2809]

i was also having problem in understanding twist boat conformer ... loved the video ♡

[@muhammadmohtasham2192]

Thanks for going over the process and using the model to explain. Made the concept super easy to understand. Many thanks for such a concise and helpful video!

[@onlyracing263]

Best video on this topic on KZbin, google ever i think🙏

[@pseudonerd7985]

yes finally visualized the twist boat conformation thank you sir!!

[@CHUBBYdeanne18]

I should have watched this when i was in college. You make it sound so easy. Thanks for this Professor Davis. Really helped me. :)

[@ChemSurvival]

+Daisy Anne Ignacio My pleasure. I'm glad you liked the video!

[@MrTinago]

+Daisy Anne Ignacio you are asia, for you everything is easy

[@ChemSurvival]

SURE! I will do this soon. Thanks for the question!

[@m.pejmannia8344]

Thank you so much. Your work is greatly appreciated. God bless you

[@quocvu85]

Thank you, you are very clear, and the model is so helpful to understand the chemistry.

[@joysarkar5770]

Thank you for such an amazing explanation, it was really helpful.

[@ChemSurvival]

one of my very early KZbin videos. I'm so glad it is still helping students a decade later! 🙂

[@VeneraKandykaraeva]

Your voice is so lovely

[@ronitkaushik4634]

Amazing explanation. Really helped a lot

[@shubhanravi]

thnx for such a detailed explanation ☺️

[@machamallalaxmisahasra4880]

Awesome visualisation thank you

[@gargiandratnamraizada865]

Thank you so much ...u made it way too easier ❣️

[@PrathamSinha-d7g]

Good video

[@moazfikry3156]

Thank you so much Great explaining

[@1Ankit11]

Thanks sir

[@gopalakrishnan3793]

i undertood about twist boat form . thank you.

[@pigivofpigland4107]

It was really helpful, thank you!

[@Shauryaverma-i5s]

Thank you so much!!! As my organic teacher just explained it on white board and it became difficult to understand there

[@ChemSurvival]

So glad this helped!

[@preksha9419]

Thank u so much sir that was so helpful

[@mohankasula5827]

Thanks for the insightful video. If you can suggest for purchasing the model will be helpful for my students.

[@ChemSurvival]

Molecular Visions (the "Darling" kit from the video can be found on Amazon. If you are looking for a more versatile, affordable and basic kit for intro to orgo students, consider Mega Molecules. They are very good for the price, and I recently reviewed their latest kit here. kzbin.info/www/bejne/f3nIf3uQbZt4qdk

[@anonymouskumar8576]

Thank you sir. Wish we had these in our classroms😅

[@ashutoshsamantaray2572]

Check out oxan 4 ol actually it exists in boat conformer with significant stability compared to chair form due to hydrogen bonding

[@onlyracing263]

Plz keep on making videos sir

[@kiritjahla1461]

This was so helpful! Cant thankyou enough! 💕🥺

[@kampfkohl]

Nice explanation. Thank you

[@at-fn9ou]

helped a lot💚

[@preksha9419]

I had a request, could you please show us the newmann structure for half chair too? I can't seem to imagine it

[@karlatoledo2069]

Thank u❤️

[@sagarathani2729]

Sir why half chair less stable??

[@ChemSurvival]

Half chair is less stable because five of the six carbon atoms are coplanar, making their bond anges closer to 120, greater than the ideal angle if 109.5. Additionally, the hydrogen atoms bonded to those coplanar carbon atoms are eclipsed (have a zero degree dihedral). Both of these features destabilize the half chair relative to the chair or even the boat confirmation

[@sagarathani2729]

@@ChemSurvival tq so much sir

[@rubiyeverino6415]

Really helpful. i have a doubt, in cicles, how can i know how are the substituyents orient in the space? How can i know what is in the plane or out the plane? This, on a papersheet

[@7princu]

One Question Professor.. The part when the five atoms of cyclohexane becomes planar is the half chair conformation right?.. Also which form is more stable Half chair or Half boat?

[@cristalblue657]

I know it is almost the same principle, but can you explain on a furanozic cycle about conformation E and T, please?

[@rishidusad2985]

thanx a lot!

[@mangalamram6945]

Really great

[@ronitkaushik4634]

We call cis 1,2 dimethyl cyclohexane as symmetrical although it's chair form doesn't have any element of symmetry. Explanation please?

[@ChemSurvival]

Rapid interconversion between the two conformers leads to a situation in which the two substituents are chemically indistinguishable from one another. This is the usual explanation offered in texts.

[@riturajverma3128]

Thanks

[@ingridzhou7906]

Thank you sir!!

[@KenKrise]

Helpful. Thank you.

[@hrishikeshkalita6972]

Sir, can you please explain about the half chair conformation?

[@anamikakalam3521]

Thank you !

[@ChemSurvival]

:-)

[@7828605801]

Hello sir impressed with your video, one small request, can you please provide me the link where you had purchased the atomic Model, I want the same atomic model :)

[@ChemSurvival]

These kits are widely available. They can be found for a reasonable price directly from the manufacturer, or from many third-party retailers like Amazon. www.molecularvisions.com/ www.amazon.com/Molecular-Inorganic-Organometallic-accompany-Chemistry/dp/0964883716

[@pitabashaacharya4178]

This model isn't available in India.

[@mritunjay2624]

Thanks !

[@sup_rohan]

Hello sir, can you post a video on why in 'cis-2-methyl cyclohexanol', when OH is on axial position and Methyl on equatorial position, the compound is more stable as compared to when OH is on equatorial position and Methyl at the axial position? I know, bulkier groups acquiring equatorial positions make a compound stable, then here (OH-17 gram/mol., Methyl 15 gram/mol.) OH on equatorial should make compound stable as compared when it is on equatorial position. Please help.

[@sumitasharma4477]

Would you please give the picture of twist boat conformation ????

[@bhanugupta5599]

sir , i want a question that in video you have shown that boat form is formed first then twisted boat is formed but in theory somewhere i have read that twisted boat is formed first then boat form takes place.

[@ChemSurvival]

bhanu, you are correct. the twist boat forms first, directly from the half chair. I wasn't really trying to show the entire process sequentially, but rather to show how all other possible configurations are achiral. I configured the model in a twist boat last so that I could end the discussion with twist boat (which was the topic of the original question). Thanks for the comment!

[@makeminecaffein8ed]

superb! this holds up well :)

[@snehabhattacharjee9727]

Sir, could you show us cyclohexane transitions from chair to half chair to twisted boat to boat.

[@AnuragYadav-fg8jo]

Sir why chair form converts into boat conformation? Why it is not always chair only?

[@AfterThisShutUp]

May I ask where you got those models?

[@ChemSurvival]

www.molecularvisions.com/Molecular-Model-Kits/Kit-1-ISBN-978-09648837-1-0-Organic-Inorganic-Organomet/prod_2.html Molecular Visions. Had that one since undergrad... very useful for cyclohexane chemistry.

[@ChemSurvival]

www.darlingmodels.com/ They are a product of Darling Models

[@AfterThisShutUp]

ChemSurvival Which kit do you think would be best for Organic Chemistry I?

[@ChemSurvival]

AfterThisShutUp kzbin.info/www/bejne/jX69ZIKap9B4e5o Best bang-for-the-buck is the MegaMolecules kit. Not really great for ring flips, but good for just about all else. Very inexpensive, compact and versatile. Great for students. They are on Amazon, and you can buy direct here www.megamoleculesllc.com/

[@kedawatkamlesh0]

AWESUM

[@debadityanath5558]

twist boat has partially eclipsed bonds?

[@bhagateducation3422]

Why c is 1, 4 di t butyl exist in twist boat and not chair.

[@ChemSurvival]

The answer lies in the diaxial interactions that would have to exist for cis-1,4-di t-butylcyclohexane in the chair. In each of the two chair conformers, one of the two t-butyl groups is axial. This creates a very high energy conformation because a very bulky t-butyl group is in the sterically crowded axial position. But the twist boat conformation can place both t-butyl groups in less crowded positions simultaneously (opposite the flagpole hydrogen positions). This is the most energetically favorable conformation, and so it is best description of the conformation of cis-1,4-dit-butylcyclohexane.

[@ChemSurvival]

kzbin.info/www/bejne/fXvdXmaohrRgfqc Here is a video reply to your excellent question, chinu singh. Thank you!

[@Taypha1914]

wish you lectured at my university

[@kalyan317a]

Sir, very impressed with many of your lectures. I want to purchase a molecular model kit to explain conformational isomerism. Where can i purchase it?

[@ChemSurvival]

www.molecularvisions.com

[@tanmaymishra2]

you missed half chair

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[@shashan.k]

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