Exam 1, Organic Chemistry I Live Review (2022)
joechem.io/videos/207 for video on jOeCHEM and attached worksheet + solution (below video on jOeCHEM aka the link)
Practice Exam: worksheets.joechem.io/workshee...
Practice Exam Solution: worksheets.joechem.io/workshee...
Worksheet Solution Walkthrough video: joechem.io/videos/wksht-soln-...
Chapters:
00:00 Intro
03:42 SETUP, Lewis Dot Structure & Choosing Major/Minor Resonance Form -- [Problem 1]
04:46 Lewis Dot Structure & Choosing Major/Minor Resonance Form [Problem 1]
16:01 SETUP, Choose Correct Structure Containing sp3 Nitrogen -- [Problem 2]
17:52 Choose Correct Structure Containing sp3 Nitrogen [Problem 2]
21:34 SETUP, Ranking Structures By Increasing Basicity -- [Problem 3]
23:04 Ranking Structures By Increasing Basicity [Problem 3a]
28:30 SETUP, Identify the Most Acidic Proton in a Structure -- [Problem 3b]
29:53 Identify the Most Acidic Proton in a Structure [Problem 3b]
34:51 SETUP, Predict Favored Side of Acid Base Equilibrium -- [Problem 3c]
35:30 Predict Favored Side of Acid Base Equilibrium -- [Problem 3c]
42:00 SETUP, Determine IUPAC Name for a Structure -- [Problem 4]
43:13 Determine IUPAC Name for a Structure -- [Problem 4]
51:50 SETUP, Free Radical Chlorination Mechanism + Hammond's Postulate Question -- [Problem 5a]
52:50 Free Radical Chlorination Mechanism + Hammond's Postulate Question [Problem 5a]
56:16 SETUP, Draw Energy Diagram for Propagation 1+ 2 Using Hammond's Postulate -- [Problem 5b]
56:16 SETUP, Draw Energy Diagram for Propagation 1+ 2 Using Hammond's Postulate -- [Problem 5b]
57:30 Draw Energy Diagram for Propagation 1+ 2 Using Hammond's Postulate -- [Problem 5b]
01:02:34 SETUP, Identify More Stable Cyclohexane Derivative of 2 Structures -- [Problem 6]
01:04:37 Identify More Stable Cyclohexane Derivative of 2 Structures -- [Problem 6]
01:11:28 SETUP, Compare Free Radical Bromination of Propane & Cyclopropane -- [Problem 7]
01:18:39 SETUP, Draw Most Unstable Newman Projection of Given Structure -- [Problem 8]
01:19:54 Draw Most Unstable Newman Projection of Given Structure -- [Problem 8]
01:23:32 Outro
Study Guides:
- worksheets.joechem.io/study-gu...
- worksheets.joechem.io/study-gu...
This is a live review for content that is typically covered on a first exam in Organic Chemistry I. The topics covered (with fully worked examples) are:
- General Chemistry (acid base equilibria analysis, hybridization, molecular orbital diagrams, resonance)
- Naming, both Common and IUPAC systematic
- Cyclohexane Chair Stability
- Free Radical Chlorination/Bromination (drawing the mechanism, explaining selectivity between Br and Cl due to thermodynamics, hyperconjugation)
- Hammond's Postulate
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Пікірлер: 8
ty sir joe, helped me a lot, upload more videos . i love you ur videos.
great video, helped a lot
1:21:57 Thanks so much for this great review! Why is Br aligned with tert-butyl more unstable then CH3 with tert-butyl? Thanks one again.
@jOeCHEM
9 ай бұрын
Br is MASSIVE (in terms of molar mass) compared to a non-branched alkyl group such as a CH3 (by branched, I mean like isopropyl and t-butyl are branched substituents, whereas methyl/ethyl/propyl groups are not branched). So because Br has a molar mass of 79 g/mol and CH3 total has a molar mass of ~16 g/mol, a Br t-butyl steric hindrance is more unstable than CH3 t-butyl. Let me know if that makes sense or not!
Great video but when solving 3c isn’t the unstable acid the weaker acid because the most stable/has resonance have a lower Pka and are stronger acids
@jOeCHEM
Жыл бұрын
Hey, Dina! Thanks for watching! In terms of acids & bases, stable = weak since a weak acid/base came from a strong conjugate, so stable can also be used synonymously since it’s lower energetically than its strong counterpart. So just like weak = stable, strong = unstable, since a strong acid/base will react & do it’s job and move to its lower energy, more stable (aka weaker) counterpart. Did that make sense? Let me know if not!
@dinamatari5193
Жыл бұрын
Thanks I think the wording makes it a bit more confusing. When looking at two different Lewis structures the one with a double bond would be more stable and have the lower pka making it the stronger acid. Correct? Is that different from that question or is it just looking at it in different terms such as energy
You explain the topics so well, I think i love you 🫠 Thank you so much for all your videos