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Michael Evans
США
Добавлен 3 янв 2008
Videos on chemistry!
Synthesis and Reactions of Amines | LTQ 9.1, Spring 2024
00:00 Introduction
00:40 Sandmeyer Reaction
02:51 Reduction of Alkyl Azide
04:45 Hofmann Elimination
06:52 Reductive Amination
10:13 Installing an Aminomethylene Group
12:02 Azo Coupling
14:06 Mechanism of a Curtius Reaction
00:40 Sandmeyer Reaction
02:51 Reduction of Alkyl Azide
04:45 Hofmann Elimination
06:52 Reductive Amination
10:13 Installing an Aminomethylene Group
12:02 Azo Coupling
14:06 Mechanism of a Curtius Reaction
Просмотров: 421
Видео
Reactions of Enols and Enolates; Aldol Reactions | LTQ 8.1, Spring 2024
Просмотров 5344 месяца назад
00:00 Alkylation of an Enolate 02:58 Haloform Reaction 07:07 Aldol Condensation 10:54 Alkylation of a Stabilized Enolate 13:49 Aldol Condensations in Retrosynthesis 15:20 Example 1 17:55 Example 2 19:56 Example 3
Acylations of Nucleophiles | LTQ 7.1, Spring 2024
Просмотров 4505 месяцев назад
00:00 Introduction 01:11 Amides from Amines and Acid Anhydrides 05:36 Hydrolysis of Esters 07:24 Partial Reduction of Lactones 10:35 Considering a Carboxylate Nucleophile 12:46 Reduction of Succinic Anhydride 15:22 Amides from Carboxylic Acids 17:18 Tertiary Alcohol from Organohalide 20:31 Synthesis of Ethyl Acetate from Acetic Acid
Nucleophilic Additions to Ketones and Aldehydes | LTQ 6.1, Spring 2024
Просмотров 4915 месяцев назад
00:00 Introduction 01:09 Imine Formation 05:04 Enamine Formation 07:13 Grignard Reaction 09:20 Acetal Formation 11:55 Hydrolysis of a Hydrazone 14:36 Mechanism of Acetal Formation
Oxidations and Reductions of Alcohols and Carbonyl Compounds | LTQ 5.1, Spring 2024
Просмотров 3875 месяцев назад
00:00 Assigning Oxidation Numbers 03:52 Predicting Products 1 07:11 Predicting Products 2 09:41 Predicting Products 3 11:26 Predicting Products 4 15:25 Mechanism of Ketone Reduction
Aromatic Substitution Reactions Practice | LTQ 4.1, Spring 2024
Просмотров 3845 месяцев назад
00:00 Electrophilic Aromatic Substitution 1 02:32 Nucleophilic Aromatic Substitution 05:14 Electrophilic Aromatic Substitution 2 07:07 Drawing Arenium Ions 10:18 Multi-step Synthesis
Solving a Rubik's Cube 1 (with a Wonky but Working Timer)
Просмотров 2025 месяцев назад
Trying to learn how to solve a Rubik's cube in under four minutes by the end of the Spring 2024 semester.
Diels-Alder Reaction Practice | LTQ 3.1, Spring 2024
Просмотров 6856 месяцев назад
00:00 Predicting the Product, Example 1 06:58 Predicting the Product, Example 2 10:15 Inferring Transition State Structure 14:41 Retrosynthesis, Example 1 18:45 Retrosynthesis, Example 2
Evaluating Aromaticity; Substituent Effects on Acidity Practice | LTQ 2.1, Spring 2024
Просмотров 5126 месяцев назад
00:00 Tetrahedral Atoms and Substituents 01:32 Heteroatoms in Conjugated Rings 05:16 Ranking Acidity 07:06 Resonance Donating and Withdrawing Groups 09:51 Considering Inductive Effects 12:22 Summary
Reaction Mechanisms Practice | LTQ 1.1, Spring 2024
Просмотров 4066 месяцев назад
00:00 Introduction 00:50 Mapping Atoms; Bonds Made and Broken 05:11 An Implausible Proton Transfer 09:08 Proton Transfer 10:46 Nucleophilic Addition to the Aldehyde 12:19 Bimolecular Nucleophilic Substitution 14:16 Summary
Criteria for Aromaticity
Просмотров 6299 месяцев назад
00:00 Introduction 02:03 Geometry and Conjugation 02:59 Conditions for Aromaticity 03:57 Hückel's Rule and Antiaromaticity 05:37 Practice with Determining Aromaticity 10:48 Summary
Combustion Analysis of CHX Compounds | OpenStax Chemistry 2e 4.5
Просмотров 42710 месяцев назад
00:00 Introduction and Setup 03:22 Amounts of Carbon and Hydrogen 04:33 Mass and Amount of Iron 07:44 Empirical Formula 08:41 Summary
Combustion Analysis | OpenStax Chemistry 2e 4.5
Просмотров 42810 месяцев назад
00:00 Introduction 01:19 Experimental Setup 03:58 Determining Empirical Formula 06:11 Practice Problem
Course Review; Preview of Organic Chemistry II
Просмотров 470Год назад
00:00 Concepts of Structure 03:40 Reactions 06:07 Regiochemistry in OC2 08:42 Stereochemistry in OC2
Applying Epoxides in Multi-step Synthesis
Просмотров 361Год назад
00:00 Epoxide Ring Openings in Synthesis 01:17 Retrosynthesis Example 04:47 Advice for Synthesis Problems 05:23 The Forward Direction
Ring Opening of Epoxides Under Acidic Conditions
Просмотров 321Год назад
Ring Opening of Epoxides Under Acidic Conditions
Introduction to Epoxides; Ring Opening of Epoxides by Strong Nucleophiles
Просмотров 398Год назад
Introduction to Epoxides; Ring Opening of Epoxides by Strong Nucleophiles
Radical Polymerization; Radical Reactions in Synthesis
Просмотров 548Год назад
Radical Polymerization; Radical Reactions in Synthesis
Allylic Bromination and Radical Hydrobromination
Просмотров 225Год назад
Allylic Bromination and Radical Hydrobromination
Radical Initiators and Inhibitors; Radical Bromination of Alkanes
Просмотров 318Год назад
Radical Initiators and Inhibitors; Radical Bromination of Alkanes
Mechanisms of Radical Reactions; Chlorination of Methane
Просмотров 461Год назад
Mechanisms of Radical Reactions; Chlorination of Methane
Alkylation of Alkynes; Alkyne Additions in Synthesis
Просмотров 221Год назад
Alkylation of Alkynes; Alkyne Additions in Synthesis
Hydrohalogenation and Hydrations of Alkynes
Просмотров 141Год назад
Hydrohalogenation and Hydrations of Alkynes
Reductions of Alkynes to Alkenes or Alkanes
Просмотров 150Год назад
Reductions of Alkynes to Alkenes or Alkanes
Structure, Acidity, and Preparation of Alkynes
Просмотров 159Год назад
Structure, Acidity, and Preparation of Alkynes
Practice with Alkene Additions; Alkene Additions in Synthesis
Просмотров 137Год назад
Practice with Alkene Additions; Alkene Additions in Synthesis
Halogenation of Alkenes; Halohydrin Formation
Просмотров 190Год назад
Halogenation of Alkenes; Halohydrin Formation
Thank you very much for this video
This video is over 7 minutes long in defining organic chemistry and the terms carbon compounds were never used, I wonder why?
@@derrick_smitty Because the video is about how to think about and solve problems in organic chemistry, not a definition for the field itself. (I mention as much at the start of the video.) For the collegiate audience I’m talking to, the definition of organic chemistry as the study of carbon-containing compounds is obvious after a couple of minutes with the textbook. What’s less obvious is the fact that applying the problem-solving strategies they used in intro chemistry won’t lead to success in organic chemistry.
@@mevansthechemist thanks for the reply and I watched the post and understand your intent but the title of the post is "what is organic chemistry? " that implies that a definition is in the content.
amazing video, well done
thankz you po, sir
Thank you so much !!
Thannnkssss💕💕💕💕
thx
thank you michael!
4:22 Dr Moore says that the first step is an oxidation at carbon 3. Is this a mistake? To my eyes, the oxidation would occur at carbon 2. This would induce the alpha carbon’s hydrogen to be acidic. This leads the way for elimination of a hydrogen and phosphate and formation of a double bond between carbons 3 and 4.
Ur video is very confusing to me fr.
Please never take these videos down. They are incredible!!!
tnx you
thanks for the video! Saludos desde Argentina!
Gracias! Best of luck in the Copa final! 😁
Thank you so much!! 🧪⚛️ Watching from Ecuador. I'm a spanish speaker, but this explanation was better than in my language 🥹
Great job ♥️ thank you ♥️
this is so confusing goooood
Thank u sir.. crystal clear
Thank you for the video it helped me alot
hello, I have a question. Do we have flow of electrons if we use voltage meter with very high resistance? i’m guessing with such high resistance there is no anode or cathode and we have an open circuit so there are no reactions occurring. if i’m wrong please correct me thank you
Voltage meters do use very little current, although the flow of a non-zero amount of charge is necessary to make the measurement. The voltage meter can only “sense” the higher-energy electrode when some charge moves. This does cause a voltage drop, but it’s a very tiny one that the meter can correct for. We use the terms “cathode” and “anode” generally to refer to the short-circuit or load situation, when the galvanic cell is acting as a battery to power something.
What level is needed to kill a plant? would one drop placed on a leaf kill the entire plant? Would accidentally spraying a small section of emerald arborvitae kill the tree?
The blocking of similar pathways, in people or plants! A wonderful example of how important this is! Particularly for Parkinson’s,and many similar diseases.
Really great explanation! Perfect refresher, thanks!
no body cares about your favourite reaction little bro 3:26
What if you would have a bifunctional initiator to induce anionic chain growth of bifunctional epoxides? Now the chain grows from 2 sides and can also connect to other growing chains, would this be considered as step growth?
Exactly what I wanted to know. Thanks
Finally i understood.
Thank you for this 🧡
Thank you so much
best video sir
My lecturer had an example of steric hindrance that could be overcome by a strong enough nucleophile. I thought it was because nucleophilicity had something to do with the thermodynamics and therefore the high energy scenario that steric hindrance is could be overcome if the nucleophile just made it thermodynamically favorable enough. If nucleophilicity is purely kinetics, that theory goes out the window. If you by chance had any time to enlighten me on the situation, I would of course be very grateful, but I understand if you dont have the time. (:
Thanks.
Niceeee!
Good video.
Thanks.
Great Video.
Nice.
Great video.
Thank you, professor.
Thank you very much, sir. I am an incoming international PhD student at NU, and I am certain that these videos will help. God bless you.
though i would use a match
noice i can understand everything
Thank you so much ❤ Finally after years i can understand organic chem so well 🎉❤️🧿
That was really helpful !🫶🏻
Thanks for watching!
Super great video, thank you!
Thanks Michael. ❤
FOR FREE??? OMG
Which software do you use sir
ty very much
thanks
In case of ortho/para directors which one is major product
In most cases, as a rule, the para product dominates for steric reasons. There are exceptions involving directing-group effects or other subtleties, but as a rule, the para product forms in higher yield.