Organic Chemistry PDF Worksheets: www.video-tutor.net/orgo-chem.html Full-Length Exams & PDF Worksheets: www.patreon.com/MathScienceTutor/collections Access The Full 1 Hour 34 Minute Video: bit.ly/3kDe8P2 SN1 SN2 E1 E2 - 4 Hour Test Review: bit.ly/3Bt4ghw

i miss when this was just nomenclature

It’s actually kind of sad that this guy can teach me in 40 minutes what takes my profs 3 hours… love the conciseness

@anj7108

2 жыл бұрын

Some people are natural teachers and most professors aren’t

@lesliesanchez6811

Жыл бұрын

paying someone who’s not even doing there job. it’s disappointing but that’s how life is now :(

@learnchemistrytactics4778

Жыл бұрын

Indeed he is good teacher. But you can learn from it because you have some basic knowledge about it.

@Grak70

Жыл бұрын

The other 2 hr and 20min is explaining why all this shit happens. This is just a cheat sheet. Useful yes. But if you don’t know what E2 means, it’s useless.

@JackAidenMarch

8 ай бұрын

@@Grak70 except in those two hours and 20 mins he ain't explaining shit. Just rambling on expecting it to click in our brains.

It is one of the greatest gifts we have in our modern technology era to be able to teach millions (probably closer to billions at this point) a variety of subjects with the level of mastery you possess... and for the most, part free of charge. You are simply the best.

I have an orgo chem test in 2 days, and I work a full 8hr shift in between, this is an INVALUABLE review session!!!

@PunmasterSTP

Жыл бұрын

How'd your test go?

@norainnoflowers1551

Жыл бұрын

@@PunmasterSTP I got a 76 for the final (which was WAY better than what I was expecting) and I passed the class _with a B!!_ 😊😊😊 not a terribly high one, but I wouldn’t have been able to even have half a shot at passing without his videos!

@PunmasterSTP

Жыл бұрын

@@norainnoflowers1551 I'm glad to hear that!

@reference_realistic

Жыл бұрын

And I'm glad to read these comments 😃

Wow I can't believe how time flies. I remember watching the organic chemistry tutor for algebra II in highschool and now I'm actually taking organic chemistry and still watching. you are the #1 GOAT channel

i appreciate all your work and effort into these videos. I tend to fall behind a lot in classes, so this is great for me to study with. Very much appreciated. Hope you see this. Keep uploading, your helping people all around the world. ♥️ty.

This is the most helpful video I've ever watched so far. We can't thank you enough man. Our professor took him a month to teach us those and you just taught us those mechanisms in 38 minutes

Me who's not even taking organic chemistry: I like your funny words, magic man.

@dianavanwinkle2299

6 күн бұрын

Me, except I am taking organic chemistry… for the second time.

This was amazingly well done! I could follow along easy when I've been struggling to find material to learn these reactions with.

SN2 SN1 E1 E2? More like "Super great amazing lectures for you!" The chart as well as the entire rest of the video was solid gold, and judging by the comments, you've already helped countless people, myself included.

Ya I'm convinced I owe you all of my tuition. You taught me more in this 38 minute video than my prof did in 1.5 months

Thank you so much for this. I needed some refresher courses for a standardized test I may decide to sit for.

@PunmasterSTP

Жыл бұрын

Hey I was just curious. Did you decide to take that standardized test?

If anyone is confused about 16:09 and why the CH3OH isn't mentioned or why the SN1 or E1 reaction will not take place, he actually explains it in the next example at 19:45 .

Thank you for the videos. You save lives Man. Thx

This video is very useful to me , thanks a lot.

One of your best video's imo. Not the easiest subject, but you explain it so clearly! I'm half way of the first year of my bachelor, and for literally every subject I've had so far your video's came in handy. Thank you so much!

I was just about to try and make a chart like this as a reference to look back to while watching his other videos!

Thank you for your explanation on this subject. It is very helpful

Thank you i have an exam today so this couldn't have come at a better time! God bless you.

@PunmasterSTP

Жыл бұрын

I know it's been a year, but how'd your exam go?

@buqbooQ

Жыл бұрын

@@PunmasterSTP i know it's been 8 months, but how'd your exam go?

@PunmasterSTP

Жыл бұрын

@@buqbooQ I wasn’t actually in a class, I just tutor some people in various subjects and come on educational channels to brush up on stuff. But I do remember my ochem tests back in college and they were fairly tough.

don't stop . you have made more video in organic chemistry... it is so useful for fundamendal learners. 😆😆😄😄😄😄

Thank you I've been waiting for this lesson

Why are you so much better than my chem prof

literally the ONLY video that made me understand. Thank you!!

let me not lie to you man, its day before my exam and you have literally carried me through organic chemistry fr

I passed my midterm because of this video, Thank you sir!

Right on time, thank u so much

😭😭you've just saved my soul.....thank you soo much

Best video ever on This mechanism

Thank you teacher from ethiopia 🇪🇹🇪🇹🇪🇹

The best video I have seen on this topic

Just what I needed! thank you

Very helpful 🥺❣️ love it

im a huge fan ...any fun livestreams :') ?

damn usually your videos really help me but this one confused me even more lol

why pay for tuition when I have you. life saver

like I could not understand my professor said at all, but now I am getting all the answers after watching a couple of his videos. Now I am thinking... there are three options. 1. I am dumb, but this dude is amazing in teaching concepts. 2. I am not dumb and this dude is amazing. 3. I am not dumb and my prof sucks and this dude is great. I think it's three. Hopefully lol

On jah bruh you ain't mess around with these videos b

shoot this is what i need to understand but do not know what is going on

I have a test on this Monday! GOD BLESS AHAHA

@saniahussain6074

3 жыл бұрын

LOL same girl Ohio State?

@ryansnyder7614

3 жыл бұрын

@@saniahussain6074 Go bucks! Good luck

i understood this less and less as the video went on

WHAT A BEAUTY THIS IS !!!!!

Primary halide, it undergoes SN2. If use bulky base, the reaction goes in E2 mechanism. Incase of strong base it will proceed as an SN2 and if primary substrate is sterically hindered it undergoes E2 reactions.

WOW, zoom students everywhere thank you

Why he didn’t give the protic and aprotic solvents a value role in his answers ??

YOU NEVER MISS

Thank you!!!!!! 🤩

Tertiary alkyl halide favour SN1 mechanism and E1 reactions. Using strong base with tertiary alkyl halide favors E2 reactions.

Hello, i have an exam in two days, but I dont understand why in minute 34:50 , it is an SN2 reaction. Because the solvent (CH3OH) is not appropriate since is polar protic. Why is SN2??

ur the goat fr, thank you!!!

What a baller. Respect 🙏

Which mechanism is in the first example ?

Clutch as always!

I have to give my ACS exam today for organic chemistry 1 wish me luck!

Thank you!

Bruh I needed this a week ago

Just in time for my exam next week!

@justingenco7413

2 жыл бұрын

just in time for my exam tomorrow!

@-snazzysnek-5570

2 жыл бұрын

Good luck!!!

@PunmasterSTP

Жыл бұрын

@@-snazzysnek-5570 Hey how'd your exam go?

@PunmasterSTP

Жыл бұрын

@@justingenco7413 How'd the exam turn out?

@-snazzysnek-5570

Жыл бұрын

@@PunmasterSTP I don’t remember lol but I’d like to think this helped for sure! In biochem this semester

Wow I just learn this few days ago but I still don't understand who knows u suddenly upload bout this tutorial video.. NICE😂😂

Secondary alkyl halide, if we use aprotic solvent like DMF, DMSO, I, CN it favors SN2 mechanism. If we use protic solvent Including water, methanol, it will favour SN1 and E1 mechanism. Sterically hindered Secondary alkyl halide with strong base and bulky group give E2 mechanism over SN2.

Education attaches all continent 😊

On the first example, why is it only the SN1 reaction that occurs and not the E1 as well?

How is this an introduction? I need to know....

Can you please clarify on example of the 2-bromo-3-methyl butane with the -OCH3. The solvent listed is protic, so would that not solvate the base/nucleophile and push the reaction toward an SN1/E1 reaction instead of SN2/E2?

@paolaortiz6

3 жыл бұрын

-OCH3 is a strong base, so you would not be able to form C+

@georgieacero7043

2 жыл бұрын

Kinda late but for whoever else was wondering, looking at problems like these I believe that even in the presence of protic solvent, as long as you have a strong base it will go E2/SN2. The solvent is a rule to follow, but more of a hint that MAYBE the mechanism will want to go E1/SN1, you have to look at the whole mechanism as a hole and figure out what will really happen. Usually most mechanisms can be dictated by looking at possible carbocations and the strengh/bulkiness of the base/nucleophile Edit: Think of it like this, the NaOCH3 used will ionize into Na+ and OCH3-, it will continuously create another OCH3 by taking the H from CH3OH, therefore regardless of having a protic solvent, you’ll always also have strong base/nucleophile present. Now, here’s a tricky part, at the end then which will you get most of SN2 or E2? For this you have to look at the SIZE of the base/nucleophile. Anything smaller than ETHANOL will act as a base = Elimination product Anything larger than ETHANOL will act as a nucleophile = substitution product WITH THE EXCEPTION OF: Acetate ion, Sulfurs, and negative carbons!

@user-jk8iu8io8o

2 жыл бұрын

@@georgieacero7043 Hi, thanks for the explanation, may I please ask what you mean by "smaller" or "larger" than ethanol? Atomic mass?

@georgieacero7043

2 жыл бұрын

@@user-jk8iu8io8o it’s a pleasure! And I simply mean the size when drawn on paper, it’s a simple trick that works

im confused for his e1 products he doesnt draw the double bond

In case of methyl bromide, the reaction will proceed using SN2 mechanism. It doesn't matter what type of solvent is used.

Hi I would like to ask if my substrate is tertiary alkyl halide ( it is 3 hexane connected together and then attach to the carbocation carbon we 2 more methyl which gives u tert) with tert butoxide and THF what will be the mechanism?

@ongqingxiang7124

Жыл бұрын

i meant 3 cyclohexane

At 10:10 you say that the product is a racemic mixture and that the isomers could be wedge or dash, but is it possible for the OCH3 to be in the plane of the molecule--neither wedge nor dash?

@claytonhoward6296

9 ай бұрын

Idk if this is too late but no it’s not possible because the stereochemistry of the leaving group it’s taking the place of is not in the plane itself. Depending on where the OCH3 comes from depends on which isomer form it becomes!

Thanks admin

summarization coming in clutch

Thank you so much

28:40 since acetate is a bulky base, why would that not be E2?

thanks

this guy has saved every engineer's life

@snow4870

Жыл бұрын

and pharmacists'

@poramessianparapio9547

Жыл бұрын

Absolutely

@gobogoblin8498

7 ай бұрын

And entomologists'

i should have just started with this video instead of sitting through 2.5 hours of sub/elim lecture

Father, thank you.

At 12:37 , why would the Hydrogen be removed rather than the methyl group? why would it not form an alcohol?

Great

@ 30:32 why is it an SN1 reaction?

18:50 But you said that 2 degree substrates with protic solvents show SN1&2 and E1 reactions Then why does this show E2 reaction and doesn't even show E1?

At 16:21 , why is it SN2 when there is a polar protic solvent ( methanol) and not SN1

Thanks!

In one of your examples reacting 2-bromo-3-methyl butane with sodium methoxide and methanol you don’t do a hydride shift from the 3’ to 2’ carbon. Why not?

this is for free is a blessing

16:54 for this example, Sn2 would not occur because methanol is a protic solvent, and Sn2 can only perform in aprotic solvents

@ahmadjarrad2635

2 жыл бұрын

Yeah that part confused me it’s in a protic solvent….

@saadinhalf

2 жыл бұрын

Fair point- I think that was just a slip-up on his part As far as I can tell, he's basically trying to say that the base always takes precedence over the solvent. That said, yes. SN2 only occurs in protic solvents. He should have put a protic solvent there, so just act like there is. Pretty sure he just made a mistake- hope this helps

@ahmadjarrad2635

2 жыл бұрын

@@saadinhalf SN2 occurs in aprotic solvents not protic solvents.

@megankorkoleo5495

2 жыл бұрын

The substrate is on secondary carbon and has a stronger base in the reaction, so even though the protic solvet is used, the SN2/E2 would occur. If it is a protic solvent but no strong base, then SN1/E1 would then occur. If you look at his table at the beginning of the video he lists the reactions depending on the solvents/bases used.

@isaach8289

2 жыл бұрын

he also did this for the following problem with the sterically hindered base. usually hes good but this is kinda throwing me off

In minute like 14:46 shouldn’t that “minor” product be the major one since the bad and carbocation are very sterically hindered or am I confusing something

Can someone explain why he was able to use another water molecule to remove a hydrogen atom in the SN1 reaction at 7:59 ... when the reaction only started with one water molecule?? I'm confused

thankyou

Man I love you

thanks dad

0:00 does substrate also mean electrophile in this case?

@jacob-fiallos2163

2 жыл бұрын

yes the substrate is the electrophile

Could someone explain what sterically hindered means

@amanmohamed478

3 жыл бұрын

Sterically hindered basically means the reaction can't happen coz group is too bulky, in a way it literally body blocks the incoming nucleophile if the compound has multiple branches that's why tertiary C is bad for Sn2

@sthvxa

3 жыл бұрын

It's like heavy groups surrounding an atom. As you can think of a carbon atom surrounded by 3 methyl groups which doesn't allow other molecules to attack on it. It basically gives repulsions to the attacking molecule.

Good

Hello! At 16:45 , could the C+ rearrange to a terciary and react throught E1 SN1?

@amorozov_9811

7 ай бұрын

that's what I was thinking, just reached out with this exact question to my prof. and we will see how she responds!!

Great Sir

How about allylic, benzylic, vinyl?

8:36 why do we add that H next to the carbocation

@shaimasaleh8987

Жыл бұрын

Since its an elimination reaction, the water attacks a beta hydrogen, not the carbon, so we draw the hydrogen so we can visualize it

How do you know that methoxide is a strong base? Like what makes it a strong base?

@crockettd840

Жыл бұрын

It has a pKa of 16, same as OH. So it’s equally basic. Same goes for any -OR, as far as I’ve learned

@shiken69420

Жыл бұрын

You know that normally OH- is basic as it was the case for an acid like NaOH kOH, BaOH CaOH, just with OH- itself they are strong bases. Now if we replace H with an R group( electron donating), it will cause increase in charge over the oxygen which makes it more electron dense than OH- and hence a stronger base (think of it as a lewis base) than OH-, and OH- itself is a strong base (pOH~ 12-13)

@shiken69420

Жыл бұрын

At least this is a more logical way to think of it. I might not be considering somethings but anyway

watching this 12 minutes before my final 👍

Why do I bother paying for uni when I can just watch the organic chemistry tutor

What’s a bulky base?

@Tom-to7dy

3 жыл бұрын

I’m not sure because I’m not an English native speaker. But I guess it is a base that is very voluminous, so like it has a lot of large groups around it and acts as very bad nucleophile because of steric interactions. An exemple would be : ethanolate is not a bulky base but the base of 2-methylpropan-2-ol is a bulky base thanks to the 3 methyl around the carbon linked to the negative O.

@Tom-to7dy

3 жыл бұрын

Sorry for my English btw, I’ve tried my best haha

@sthvxa

3 жыл бұрын

Bulky base is something which has CH3 ( methyl group ) giving so much of steric hindrance to the molecule. Like , sodium tetra butaoxide. It's structure kinda looks like three methyl groups attached to the carbon atom which indeed is giving the overall molecule much hindrance.