Uploaded July 2021 | Updated September 2026, 2 weeks ago
Resonance structures in chemistry got you down? Resonance is when a molecule or ion can be described by multiple valid Lewis structures and the true structure is an average. Resonance structures can also be called resonance forms or resonance contributors.
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Time Stamps:
0:00 Describing a rhinoceros to aliens with a limited vocabulary
0:44 Resonance explained
1:20 Resonance structures of the carbonate ion
2:55 Resonance arrow
3:18 The true structure is an AVERAGE
#Resonance #Rhinocerous #Chemistry
Resonance structures in chemistry got you down? Resonance is when a molecule or ion can be described by multiple valid Lewis structures and the true structure is an average. Resonance structures can also be called resonance forms or resonance contributors.
Watch the whole playlist: youtube.com/playlist?list=PLvUW25kBaMMuKRkW9gDV7vlAk4Y9WRU7c
Playlists to ACE Chemistry:
youtube.com/playlist?list=PLvUW25kBaMMssGHFrR4Ee7_-8cFBvBkgN
youtube.com/playlist?list=PLvUW25kBaMMs9m0GL4dz8jSs0K4PWfqCp
youtube.com/playlist?list=PLvUW25kBaMMvs5nsG1VUQA0wsP9LGEQha Can you solve it before Kekule?
youtube.com/playlist?list=PLvUW25kBaMMuHwUffHLOozSFQ0Cz_iTnC
youtube.com/playlist?list=PLvUW25kBaMMv7_3jTEAe3vVZqPhsjf5Oy
youtube.com/playlist?list=PLvUW25kBaMMtc45U4K2b0Dm88L9D7d0EE
🍵Buy the Professor a tea to keep the videos coming: patreon.com/c/ChemistryinaNutshell
🧪 For the chemist who prefers eyebrows: Grab the complete collection of 11 hand-drawn lab safety posters: payhip.com/b/SNQL0
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Time Stamps:
0:00 Describing a rhinoceros to aliens with a limited vocabulary
0:44 Resonance explained
1:20 Resonance structures of the carbonate ion
2:55 Resonance arrow
3:18 The true structure is an AVERAGE
#Resonance #Rhinocerous #Chemistry







![SN2 Trap: Why (R) Doesnt Always Invert to (S)
Think SN2 always inverts R/S configuration? Dont fall for the (R) to (R) trap on your midterm! If youve been taught the Golden Rule that SN2 must flip between R/S, this video is required viewing.
Were dissecting a textbook lie utilizing a 1970s breakthrough from the H.C. Brown lab. Ill show you exactly how an (R) reactant can produce an (R) product through a perfectly standard SN2 mechanism, WITHOUT breaking a single rule.
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🧬If you need a refresher on chirality for mechanisms to make sense, start here: https://www.youtube.com/playlist?list=PLvUW25kBaMMupOdw1Wgy8YauiQ40J_5nx
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What youll master in this gotcha question breakdown:
• The CIP Trap: Why (R) to (R) isnt a mechanism failure, but a priority change.
• Super-Hydride Logic: Dissection lithium triethylborohydride (LiEt3BH) to see why its the surgical strike of nucleophiles.
• The Spatial Literacy Test: Using 3D molecular models to see the backside attack when the 2D drawings fail you.
0:00 The 5-Point SN2 Chirality Trap
0:23 Tiebreakers: Assigning Priorities to the Reactant
1:00 The Hand Rule: Confirming the (R) Configuration
1:26 Is Super-Hydride too bulky for SN2?
1:48 [SOURCE] Krishnamurthy & Brown Paper (1982)
2:08 3D Model Walkthrough: Geometry of the Nucleophile
2:54 The Mechanism: Concerted Backside Attack
3:55 The Umbrella Inversion vs. Configuration
4:30 Re-evaluating Priorities for the Product
4:56 The Hand Rule: Why the Product is (R)
5:10 The Verdict: Why (R) stayed (R)
5:23 Pro-Tip: How to assign R/S in seconds
📖The Research (Primary Source for LiEt3BH): Selective reductions. 31. Lithium triethylborohydride as an exceptionally powerful nucleophile. A new and remarkably rapid methodology for the hydrogenolysis of alkyl halides under mild conditions
S. Krishnamurthy and Herbert C. Brown
The Journal of Organic Chemistry 1983 48 (18), 3085-3091
DOI: 10.1021/jo00166a031
https://pubs.acs.org/doi/pdf/10.1021/jo00166a031
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Citations:
Paula Yurkanis Bruice, Organic Chemistry 8th ed
https://openstax.org/details/books/organic-chemistry
https://openstax.org/details/books/chemistry-2e
Music: https://youtu.be/lL6AsbG07xY SN2 Trap: Why (R) Doesnt Always Invert to (S)](https://i.ytimg.com/vi/IHSRGx_GlZA/mqdefault.jpg)


