2.4 Resonance | Organic Chemistry
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- Опубликовано: 2 июл 2024
- Chad gives a comprehensive lesson on Resonance, showing organic chemistry students exactly how to draw resonance structures easily. He starts by reviewing what students would have learned in General Chemistry including the idea that resonance implies delocalized electrons which typically results in greater stability. He then covers numerous resonance structure examples relevant to organic chemistry including resonance with carbocations, resonance with lone pairs of electrons, resonance with radicals, and how to draw resonance structures with arrows. He also shows how to predict what the structure of the resonance hybrid should look like and how to determine which resonance structures are major or minor contributors. Finally, Chad shows the relationship between resonance and hybridization, and how to properly determine the hybridization of an atom when resonance is a factor.
If you want all my study guides, quizzes, and practice exams, check out my premium course at www.chadsprep.com/organic-che...
00:00 Lesson Introduction
00:23 Introduction to Resonance
05:02 Drawing Resonance Structures (Arrow-Pushing)
11:29 Drawing Resonance Structures for Stabilizing Carbocations
16:22 Drawing Resonance Structures for Stabilizing Lone Pairs
20:30 Drawing Resonance Structures for Stabilizing Radicals
22:19 Determining Major and Minor Resonance Contributors
27:08 Additional Examples with Drawing Resonance Structures
36:18 Resonance and Hybridization
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Sir, you are honestly THE BIGGEST LEGEND on this platform. If you were a hedge fund manager on Wall Street, you would have THE biggest investment firm in the vicinity. I would have the majority of my net worth in your fund. You would be the Michael J. Burry during the 08-09 crash times 10! I really appreciate you making these videos for us. I have never seen anyone teach this content better than you. Good luck with your business!
Thanks Shahzeb! I appreciate the hyperbole! Happy Studying!
Out of all the youtube channels, you have the most clear and straightforward explanations. I really appreciate the simplistic approach. My orgo grade is saved because of you Mr. Chad!
Glad you like how we do things here - thanks for commenting, Nicole.
thank God we still have teachers that care! This right here is the key to Ochem; as one starts to look at reactions and mechanism.
Thanks for your comment, Alozie. Keep up the learning!
I am studying for my ochem final with these videos, and I cannot thank you enough for your help. You are such a passionate and positive teacher, I wish I had come across your videos the beginning of the semester. All the information is organized perfectly in a way students can understand. It's so easy to compartmentalize all of the information in my head. Truly thank you thank you so much!
You're welcome - glad you found the channel!
You are the person I love watching RUclips videos for studying the most. Your explanation is excellent and you deliver the information quickly. Good luck to you.
Thank you - very kind words.
For some reason the way you explain things just sticks with me and I am able to understand so easily. Thank you!
You're welcome - Glad to hear!
Just came across your channel Mr. Chad and I've got to say it: what an AMAZING work you've been putting out there! What a gem! I've never been happier studying for chemistry, let alone ochem! A FORTY min video from a human with so much passion about his teaching job, who doesn't take a SEC to catch his breath and gives so many remarkable explanations along the way!!! A 40' video could literally replace the 2h lecture on a random Tuesday during winter semester, from which I left with nothing but dizziness. Thank you sir! Tried to let people know on my instagram story about this channel but couldn't find any relevant profile to tag :(
Glad you found the channel - thanks for your kind words!
I haven't found any other video that has been able to teach me this so thank you sm my test is tomorrow and I was struggling
Glad it helped! Good luck on your test :)
Thank you so much Chad!!! THANK YOU THANK YOU THANK YOU.
For posting your video lessons.
But most importantly, for taking the time to put yourself in your students' shoes, explaining things to us SLOWLY AND REPEATEDLY to make sure we got the point CLEARLY.
THANK YOU SO MUCH. I love that you mimic your student's possible reactions to some concept, AND THEN you explain WHY things work the way they work.
Im a Chem graduate, but 2 years of my studies were wasted during COVID. Our professors didnt conduct online classes or made video lessons like this. Just sent us a few worksheets, our syllabus, and gave us grades. Then they got their salaries. I got high grades but i actually didnt learn much. I am now making up for it as i prepare for our Board Exam. I know i didnt deserve those high grades but I accepted them anyway because of the benefits i would get (mostly financial, like review fee discounts).
ANYWAYs. You probably didnt read that long story lol but id understand.
THANK YOU FOR YOUR HARDWORK.
Or maybe I did read it! I managed a chemistry tutoring facility for a looooonnngggg time and my anticipation of possible students' questions or misunderstandings was born out of that time. It may have been the best job ever :)
Glad you have found my videos helpful!
At this point I just leave my actual lecture go home and watch your version, the way you teach is so clear and concise. You will always be my go to organic chem and gen chem professor.
Glad the channel/videos are helping, spicytrailmix - Happy Studying!
You're amazing, Chad! You make studying for the OAT easy!
Thanks, Abby - glad the videos are helping you with the OAT!
Very well made. Your presentation really helped explain the subject matter, especially regarding resonance and hybridization ! Thank you for sharing excellent work.
You're welcome - and Thank you!
Best resonance video out there! Thank you so much
You're welcome, Maria - thank you!
You are really God sent. You cleared my doubt. I watched a couple of videos and couldn't understand what they are trying to explain in resonance. God bless you and keep you. Please keep the videos coming. Thank you.
Glad the channel is helping - Thanks and Happy Studying!
You are awesome and very straightforward with your lectures. Thank you for making this helpful video. Beautiful shirt too!
Thank you very much!
I could not understand resonance for weeks when my professor was explaining it, then I found Chad’s video and he made it understandable in the first 10 minutes! Thanks, Chad!
Glad it helped, Angel!
beautifully explained, thank you!
You're welcome, Ana!
Dear Chad, I wanna thank you for being such a great teacher. you make things simpler and calm and I cant believe Im saying this but also kind of fun. THANK YOU
Great to hear - You're welcome and Thank You!
The best explanation of resonance. Better than my professor of inorganic chemistry, and better than my professor for organic reactivity. Your God turns (not only yours, but our) darkness into the Light :') A very sincere "Thank you" from Europe
Thank you and you are welcome (from USA)
Tip: playback speed 0.9 ;) other than that: this is absolutely an amazing addition to my study material. It's awesome.
Having that adjustment can be super helpful - I often make that suggestion since I tend to talk pretty fast and lots of students are not native English speakers - whatever speed works for you is best!
Godddd bless you sir! I would not understand why I was getting my homework wrong without this video!
Thank you - glad you found the video helpful!
Your videos are just fantastic. Tried my best to figure out this lewis structure thing but to no avail and here I am in just 20 mins figured it all out due to your superb style of teaching. Thank you heaps. You are doing an amazing job! Love your shirt too especially the bible scripture (the Psalm). God bless
Glad you found us - Thank you!
You are the best teacher chad
Thanks for the positive feedback! Very glad you're finding these helpful!
Chad's Prep we are also getting huge benefit from your lectures, Thanks Professor Chad!
After a whole day of watching youtube videos I finally understand this concept after watching this video. Great explanation you saved my organic chem test grade!
Glad to hear it - Happy Studying!
That last point about Nitrogen hybridization is gold. If the Nitrogen has delocalized electrons, it won't hydrogen bond. It's a tricky concept that comes up in Biochem and makes for tricky questions.
Great point Peyman! Also comes up in biochem to explain the lack of rotation about the peptide bonds in proteins.
@@ChadsPrep Yes. That's another one. Also, it can change the pka of a molecule drastically and so on. Thanks for the videos btw.
@@peybak That change in pka, is that because the nitrogen can't become positive (by attracting a proton)?
Class video mate, thanks
You are welcome!
Awesome vid, I understand resonance way more
Glad to hear it!
Awesome 😮 !
Mind-blowing ❤
Wow - glad to hear it!
Thank you, Chad!💕 You are the best. Your videos have been helping me a lot 😍😍 I'm wondering if you have a video for NMR as well.
He has an intro vid to NMR ruclips.net/video/krlKEi8aYYU/видео.html
i love your shirt! Motivates me in this dark time of studying orgo lol. Thanks for all your help
You're welcome and Thank You!
I've taken ochem 3 times already... nothing has helped me learn the material UNTIL NOWWWWW THANK YOU SIR!!!!!!!!!!!!!!!!!!!!!
You are very welcome.
SIR YOU JUST SAVED MY LIFE. I LOVE YOU RESPECTFULLY
You're very welcome.
I used to be afraid of O chem, but now I know I'm gonna get A in the class fs..... Thanks Chad!
Love the confidence - you can do it!
Thank you Chad. You are saving my Ochem grade. May god bless you for sharing this information.
You're welcome - and Thank you.
you are the best professor i have encountered
Wow - thank you.
You are awesome Chad! Clear explanation of every little detail. Are you by any chance also making new physics playlist for 2020-2021?
Hello Ruben! I'm currently maxed producing this ochem playlist and a high school playlist during the current school year. I'm looking at a new biochem playlist during the summer and new physics and gen chem playlists next school year. But at least the old physics playlist is available. While I plan to update the new physics playlist with better lighting and sound, is there anything in particular you would have liked to have seen that isn't in the old playlist?
Thanks and Happy studying!
@@ChadsPrep No problem. Just curious. I will definitely let you know if there's anything in particular I have trouble with. Thank you for your hard work, definitely helping me study for the OAT exam.
@@ChadsPrep I cant wait for that BioChem lesson, I've literally been using you for all of my studying because the way you teach makes learning the subjects so much easier and I've gotten an A in both Chemistry courses and Organic Chemistry 1, I'm going into Ochem 2 this coming semester and Physics 1 so Ill definitely be using more of your videos, Thank you so much for these you've made a huge difference in my life and I can't thank you enough!
I really appreciate your explanation !
BTW, can you explain how is it sp2 on 37: 31?
Thank you thank you thank you so much !
Seriously, you are a legend wow How can you make these things sound so simple?
I hope this comment makes your day just like you did to me
Glad you find the video so helpful, Joy Lee - I appreciate your saying so!
thank you so much 4 helping us ❤
You are most welcome!
You are amazing, I love the T-shirt
Thank you x2!
Sir I don't what to say. You are just the best.🎉🎉🎉
Watching from Africa❤
Kind words - thanking you from USA - Happy Studying!
@@ChadsPrepThank you❤.
Am knowing your channel late. By the way my juniors will enjoy it🎉.
Cheers!
@@AFCOE Excellent!
You are a really good teacher chad! But I didn’t quite get the reason behind the stability of various resonance structures based on degree of the carbon.
Thanks Kiran! I didn't actually get to explaining the reason behind it in this lesson but it's called hyperconjugation. I'll be covering it in chapter 6 and you can see an explanation of it in my old ochem playlist at 2:40 here: ruclips.net/video/OzrWMNMNvuM/видео.html&feature=emb_logo
Hope this helps and Happy Studying!
Would you please let me know what textbook are you using here?
I got a 4/10 then a 2/8 on my first two quizzes. Realized it was time to double down because I was not getting it. Your videos are helpful so far! Do you have practice problems available anywhere? Or something you recommend for me? All the best.
I love your shirt!
Thanks!
you're the reason i'm passing chemistry, thx
Glad to hear it!
Hi Chad,
why is it not allowed to branch out when developing the different resonance formulas?
Which part of the video is this?
Hello Chad, I have a chapter named pie bonds as electrophiles do you have videos related to that chapter? I couldn’t really find anything
Hi Parna! Not the typical way such a topic is titled, but this likely refers to nucleophilic addition to carbonyl groups and possibly similar reactions which most is commonly a 2nd semester topic. I cover it in chapter 19:
ruclips.net/video/3zYqM0aUwFg/видео.html
If your chapter also includes nucleophilic acyl substitution reactions, I cover those in chapter 20.
Hope this helps!
@@ChadsPrep thanks a lot👨🏫
@@parnasoleimani3153 Most welcome.
king.
Thank you :)
what about a conjugated diene? how do we determine if something is more or less stable than it
?
Hey Zain - are you asking about resonance structures for conjugated dienes or comparing conjugated versus non-conjugated dienes for stability?
@@ChadsPrep if we had several alkenes and one with a conjugated diene- how would we go about it ?
Conjugated dienes are more stable than alkenes, but can you be more specific with what you are trying to compare?
boss man
Thank you.
I am a chemistry teacher from India. I would like to know about chemistry topics that will teach grade 9 to 12 students.please kindly share it.