Nomenclature: Crash Course Chemistry #44

Ever feel like there's an international team of bad guys changing all of the easily remembered chemical names and turning them into test-failing, number-infused, pain-in-the-neck names? Well... you're not wrong. IUPAC exists, but try to keep in mind that they're doing it for the greater good. In this episode, Hank talks about IUPAC, prefixes, suffixes, ranking, numbers for carbon chains, and cis or trans double bonds.
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: apple.co/3d4eyZo
Download it here for Android Devices: bit.ly/2SrDulJ
Common Functional Groups: en.wikipedia.org/wiki/Function...
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Table of Contents
IUPAC 0:00
Every Organic Compound Has Only One Name 1:02
Prefixes 2:16
Suffixes 2:47
Ranking Functional Groups 4:18
Lowest Possible Numbers for Carbon Chains 1:54
Cis or Trans for Double Bonds 6:35
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[@crashcourse]

Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App! Download it here for Apple Devices: apple.co/3d4eyZo Download it here for Android Devices: bit.ly/2SrDulJ

[@Mikej1592]

I thought I was confused and not able to understand this stuff, then I watched this video, now I KNOW I am confused and unable to understand this material.

[@salmonorigami]

At least you learned something then, right?

[@Mikej1592]

AbuBakr Akram I passed the class with a B so I guess I did.

[@rebekahsadie]

@@abubakrakram6208 you know what's crazy? You have the same beginning name of my chemistry teacher. "Abu Baker"

[@izj-19]

Bwahaha

[@kelliefiteturner6836]

PREACH

[@jefffceee8930]

"IUPAC is the international organization responsible for your unhappiness" lmaooo

[@emma-bg3zb]

Chemistry test tomorrow, let's do this

[@drfifteenmd7561]

emmy irene I got an average of 69% on mine. :( I actually tried too.

[@sdslayer100]

Hey 2 years later did you pass

[@louisbradbury2347]

@@sdslayer100 Hey 2 months later, i think thats a no

[@sdslayer100]

@@louisbradbury2347 Hey 4 minutes later that sucks

[@KatherinePierce_81]

Just a friendly reminder for other young ppl studying for exams Don’t forget to study your textbook 📚

[@TheTootsiegal6797]

"You don't need to know theses by heart" lol in grade 12 chem you do :'(

[@JohnnyDoeDoeDoe]

I came here for the exact same reason :( Good luck on exams

[@TheTootsiegal6797]

John Doe you too man, you too.

[@RianKashfi]

He said "beyond the complexity that we have here," meaning that he was taking about like huge-ass molecules that are super-duper complex, so don't worry. :3

[@kitaisuru]

lol i'm in grade 11 herealso have to do all kind of chemical equation between these things

[@cubedude01]

Kitai Suru If you go into college Chemistry you'll be in for a shock. 11th and 12th grade chemistry are nothing compared to even first year Chemistry.

[@oafkad]

Albert Einstein - 'Never memorize something that you can look up.'

[@vaibhavkumar8541]

Hey, Folks! Wtf ....

[@kedaariyer4887]

Wtf the internet never even existed when Einstein was alive

[@kennygucci]

Kedaar Lyer Umm.. “looking up" means from dictionaries, or any encyclopedia.. Yes, you can look up things from sources other than Internet... *sigh*

[@SeraphicGoddess]

I wish someone would tell my Ochem professor that 🙃

[@sniperammow4865]

Deondre Johnson I am just in high school and I am dying, how much pain are you going through.

[@kylehazachode]

I've been watching CrashCourse forever now, and I just realized something awesome. The animations are very similar to the animation cutscenes used in The Hitchhiker's Guide to the Galaxy nice

[@JanelChristensen]

Nomenclature was always my favorite in organic chem. Even when I was failing the class, I always did well on nomenclature.

[@19jewels95]

I think so many students find these videos, and similar youtube videos so helpful is because you have already learnt this in class. Hearing it for the first time is always so much more confusing, but having it solidified in a different format and with a different perspective makes all the difference. This is mainly because I'm trying to study chemistry on my own (screw you GAMSAT), and watching CrashCourse when trying to learn a new topic for the first time, I find I actually learn very little. So, whilst CrashCourse is a great resource to catch your interest in the sciences, or as a quick refresher for students, it is pretty bad for people learning it the first time. So if you're having a lot of trouble learning, its not you. Keep studying, and it'll make sense soon enough :)

[@chocozeus920]

That's right; I don't agree with the people that say they learned much more from a 15-minute video than a 3-hour lecture. It's simply that the first time it's all foreign concepts heard for the first time.

[@shaniaali1497]

yup

[@jennali9800]

Actually, I'm trying to study on my own too, and I find Crash Course very easy to understand. But then again, I've always been a fast learner, and I'm also the kind of person who likes watching at 1.5x speed...

[@sniperammow4865]

Julie Lam lol your funny, in grade 12 this is an Independent study unit, I am learning thermal while doing this. There is a 30 min presentation and a test in and we only get 4 weeks.

[@abinashsharma5036]

thankyou

[@acetylen42]

7:26 - tell that to my chemistry teacher, back when I was in highschool.

[@sniperammow4865]

My chem teacher says to our choice if we want to memorize, most people do because they don’t want to spend 3 house after school to finish there test.

[@6mozuke9]

"You don't have to memorise this!" Tell that to my Organic Chemistry lecturer and my unit coordinator... :(

[@craydenrosario7847]

Amazeballs!!!!! Totally mind boggling way of explaining!! You've just showed something worth living to and understanding so deep in the curious that you can never imaging. Stay blessed n continue the amazing work!!

[@AironExTv]

Another awesome lecture. I'll try to remember this when i need to look it up again. Thanks.

Standardisation, it's a pain in the ass. But it's just that kind of pain in the ass that actually saves your life. Just like a prostate exam. Wait what.

[@sniperammow4865]

Nahuel Méndez Diodati you are amazing.

[@elizabethralston6486]

I kind of love your right now. You made more sense in this video than my chem teacher did in a week of learning this. He is horrible at explaining! Thank you so so so much! (seriously, I'm on the verge of tears right now because this has been the longest day, and not understanding chemistry has been the icing on top of the evil monster cupcake. Thank you)

[@nanziie2876]

Thank you so much! this helps me understand more of organic chemistry. I've learned about Trans and Cis before my class teacher explain to us. Now, I feel like a nerd haha

[@icestonevulpix3469]

3:19 no you get drunk.

[@FriarTug]

"And no, I'm not doing the cinnamon challenge... Ever!" Didn't I just recently seen you do the cinnamon challenge. (Starts searching through every episode) Oh, that was your brother. Never mind.

[@anonymousaubergine4455]

what ep was it?

[@Alex_Off-Beat]

I think it was the World History ep on the spice trade.

[@FriarTug]

I swear that I remember answering your question, Robert Dmitri, by posting that link in a comment to you. It's weird that I remember doing this, but clearly I didn't.

[@Alex_Off-Beat]

It's World History #23: The Colombian Exchange

[@anonymousaubergine4455]

The Reasonable Gamer nope, never heard of you

[@paigehardy7236]

I actually enjoy watching all his videos and find them very helpful! thank you!

[@megansnyder1899]

this is perfect, i needed a quick review. none of the 55 min naming compounds like all the other videos. Thanks!

[@jackwaynard6480]

In case anyone was wondering about the exact precedence of the functional groups listed in this video (ranked in decreasing priority): #1 Carboxylic Acid #2 Esters #3 Aldehydes #4 Ketones #5 Alcohols #6 Amines

[@HerTheOneAndOnly]

"She was right, that girl was trouble" I am actually in tears

[@RahulBasu2001]

Just the enthusiasm with which Hank teaches makes me smile :D

[@WhiteKillerRabbits]

This was a fantastic video- Hank's the best!

[@annthorn8956]

Hey, Crash Course, staff. Great thanks, for your videos pep's it's really helpful to me ever since G-11 up to now especially in the world of science, biology, chemistry and etc. especially chem.

[@juaniusm]

when these KZbin videos teach you more than your college professor does... thank you so much for these videos

[@imreadyfornothing]

Ive spent hours trying to find a video finding a video that explains this so I can understand, and this one did, tyvm!

[@CHUCKLZLORD]

Wonderful episode

[@Yamikaiba123]

It would be so useful if KZbin gave us a 0.75 speed.

[@TheRok]

Video Speed Controller extension for Chrome.

[@lkjkjhhgf]

why just why

[@tejasmenon8643]

It gave spees

[@limitless_j]

Your wish was granted

[@CRUSHURFACE1]

JOmegaRadical I guess there is a god after all 🤷🏻‍♂️

[@Waggles1123]

It'd be cool if there was an online game where you could build molecules based on IUPAC names.

[@IceMetalPunk]

Your wish has been granted: web.chemdoodle.com/demos/iupac-naming

[@Mompellion]

I've found something similar to the topic you spoke about at 1:40-2:05. In 1668, John Wilkins tried to create a language in which each word represented the thing itself. For instance, Zi identifies the Genus of “beasts” (mammals); Zit gives the Difference of “rapacious beasts of the dog kind”; Zitα gives the Species of dogs. (Sometimes the first letter indicates a supercategory- e.g. Z always indicates an animal.)

[@steelguard3]

Very nice and complex material. Keep doing that good job!

[@rebeccaclark1885]

watching this in 2019 and remembering the cinnamon challenge was a thing

[@Fenkick2021]

I’ve never been so confused about something in my life

[@ionalang7888]

This is so helpful! Thank you!

[@rajnishbhatt]

cool video!!!!!!helped me a lot

[@slystitched507]

I still cant believe we took this in class dont remeber any of this

[@xcarsan]

Now I have hope on passing my exam. Thanks!!!

[@gabriellathompson7134]

James Ryder

[@Cillyman17]

SO HELPFUL

[@noxjoe]

Bro, youre awesome. Gonna watch your vids after every new lesson.

[@matthewcilia2498]

The flash: Hank Green, the fastest man alive

[@misaoayakarox]

5:23 I can't be the only one who saw Pit from Kid Icarus as the angel there, right?

[@sarkisianelin]

YOU SAVED ME thank you for these amazing videos!!!

[@jacobreinvented]

This was really helpful. Thanks.

[@MoonSpotRoXX]

Thank you IUPAC! Need more of these systems, or naming conventions ideologies, being used in more fields/subjects. Time is better spent learning and understanding the material in depth. Which, in my view, is a big chunk of what good nomenclature enables. Rather than being forced to stroke some (often) dead persons ego. Be tested on their life's woes, and why 'X' is named after them, or why they got to chose what to call 'X'. Leave that kind of 'trivia' for the more fanatical people. Or perhaps history classes ;)

[@SanaMF]

I'm done with Chemistry and Biology ! Next semester I'll be taking Physiology and Physics ! I would appreciate it if you make us a few videos to explain annoyingly non-understandable material into fun understandable ones. :D

[@50doctorwho]

after this series is done they're doing another "mini series" I know that john is doing another literature one, I'm not sure what hanks doing but Physics seems like the logical next big series for Hank

[@Teaj383]

introductory physics is fairly easy if you're good at math, and also very logical. At least to me. I wish you luck in physics, though, as I know that it's not everyones strong suit.

[@SanaMF]

thank you guys

[@KemaTheAtheist]

Khan Academy

[@Kmartsmart]

If you're decent at math, introductory physics is really, quite easy. Just make sure you know how to use your formulas and you'll do great!

[@siriy2869]

Wonderful and quick explanation/ revision for the night before the exam!

[@johnlittlejhn3632]

I've literally binged this whole thing I have my psychology and chemistry exam on Monday yay

[@tiggerthecat1]

I dont use these videos to actually study with! They are great for review and consolidating or reinforcing the knowledge I already have! Not only that but they are actually funny and entertaining to watch!

[@AbujanDiico]

ok... that somehow got stuck in my brain more than the 2 hours lecture! is it the colors and picture? our chem prof is not exactly the nicest thing to look at. just saying thanks for the vid it helps.

[@pinkvio]

I’ve been having the hardest time with this and I laughed from my heart at the intro

[@caitlynk4449]

This is awesome I love these videos thank you so much

[@shnitzle]

I got a 77% in chemistry as we speak, that’s about to go down tomorrow.

[@ttamdude]

Am I the only one that wants a crash course physics? I love this stuff!

[@jessicacanary4017]

I needed that intro. Thank you.

[@daanush468]

Awesome work. Totally subscribing.

[@asdfafafdasfasdfs]

Why can't we just spell out the formula...

[@georgebright9046]

When you say add "-one" onto ethane to make ethanone isn't that incorrect? A ketone needs at least one carbon on either side of the carbonyl, ethane with two carbons can only be an aldehyde. The smallest ketone is propanone.

[@marciolazzarotto4971]

Ethanone hurts my ears

[@ptolemycleopatra]

Thank you so much I was looking for a good Nomenclature video last week and here we have one!

[@erikamoses3848]

you are a complete blessing like you're literally amazing

[@trewq333]

Dang it! Playing at normal speed sounds like he drank too much coffee, and at 0,5x he sounds like a drunk person!

[@NithilanVincent]

isn't 7 hept not sept?

[@Maryam-dr3se]

+Nithilan Vincent no it's sept

[@NithilanVincent]

ok well then my chemistry teacher is teaching me incorrectly MemeeihD

[@Maryam-dr3se]

Nithilan Vincent oh

[@LeeMisLabiosx]

+Nithilan Vincent My Lippincott's biochemistry text book says it's hept! :/

[@jacobburton1213]

Latin = Sept Greek = Hept

[@arandomzoomer4837]

this video made me happy

[@epicminecrafter5404]

*Always makes our lives easy thanks man*

[@livintolearn7053]

This guy is so much better than my teacher...

[@wildbanana5628]

ha ha ha

[@kitsumyr9752]

7:31 "thats why we have the internet and textbooks..." tell that to my prof 😂

[@banaalani7216]

OMG YOU SAVED MY LIFE! MY EXAM ON SATURDAY AND I WAS SUFFERING FOR A WEEK TO UNDERSTAND THESE CONCEPTS I WISH YOU ARE MY PROF :( MY LIFE WILL BE SO MUCH BETTER.

[@tanmaydeshpande5748]

u r doing a great job...!!

[@frollard]

Not to be too brash... but this is a fucking nightmare. I love it :)

[@zekebednarczuk5739]

*bout 6 minutes in on my 10th time watching* "OH NOW I GET IT"

[@ezelanne]

This gave me hope

[@brojeshrishimukherjee9411]

Too good explanation of nomenclature

[@selbmannlisa]

Thankfully i am about to learn most of that by heart. Fun times!

[@TheFireflyGrave]

Finding the longest carbon chain feels like finding the longest road in Settlers of Catan.

[@ArtificialDjDAGX]

The IUPAC list isn't in the description...

[@yukelid]

exactly

[@madhughneasai7106]

en.m.wikipedia.org/wiki/Functional_group#Table_of_common_functional_groups

[@neoretrodude]

The issue was not this - it was that in the video there is a link below for assigning names in molecules with multiple functional groups, like a hyrachy

[@neoretrodude]

it's mentioned in about four minutes fifteen in

[@rockyp3917]

This was the most entertaining and most difficult video at the same time. 😂😂

[@Departedreflections]

awesome video, well organized

[@H3c171]

make the speed 2... 0.0 bruh

[@makecostaricahome]

Cristiano Ronaldo and then .5 speed for a drunk giggle

[@Rin-qj7zt]

+Cristiano Ronaldo yeah, sometimes that's exactly what my professor sounds like in class.

[@malinarobertson4272]

+Cristiano Ronaldo HAHAHAHAH

[@TM-hd4ih]

how do you change the speed?

[@anjalaabner8962]

0.5 LOL

[@malaak.623]

Biochem exam tomorrow✌🏻😬

[@lordheaviside2605]

This video was so helpful I watched it over and over again. I decanted 236.588 mL ± 12.350 mL of oxidane into a cylindrical poly(ethyl benzene-1,4-dicarboxylate) flask and drank it to maintain a tonicity suitable for homeostasis.

[@BoldOpal]

lots of information, I'm going to have to watch this again to fully absorbed it.

[@heddiepalazzola7118]

*I need essay writer. Please recommend.*

[@deidrestaner1388]

*essay.0b0.all-about.in* - *this service has done well with all the papers I requested or needed.*

[@Moseslimky]

i wonder whether John has disowned Hank for wearing a Manchester United shirt

[@liammegill749]

it's a Swindon Town shirt...

[@crazyaaliyahcharger]

Was doing chem recap and couldnt help but notice that you're a manu fan!

[@LigerZero1985]

is always delightful i understand what he says in the video without jumping back to text book. anyway, this is a very useful video for organic chem students.

[@starfirenonie]

isnt the prefix for seven hept?

[@abubakrakram6208]

starfirenonie Yes..........................

[@alexhartley3576]

ya :/

[@fatimadelowar9106]

starfirenonie yp

[@Erik-yw9kj]

This video was a lot of fun =) No I'm not being sarcastic!

[@sprout1727]

Watching this minutes before a chemistry test, thank you 🙏🙏🙏

[@hoohooswag]

OMG HANK I LOVE U SO MUCH

[@BecauseWeCanTheChannel]

Want to lose weight? Say the IUPAC name of table sugar before consuming it. (2R,3R,4S,5S,6R)-2-[(2S,3S,4S,5R)-3,4-dihydroxy-2,5-bis(hydroxymethyl)oxolan-2-yl]oxy-6-(hydroxymethyl)oxane-3,4,5-triol Don't ask me why KZbin decided to put a line through parts of the name.

[@andrewephron4389]

umm... i think i'll stick to glucose or sucrose...

[@BecauseWeCanTheChannel]

But how do you know the structure of sucrose without saying (2R,3R,4S,5S,6R)2[(2S,3S,4S,5R)3,4-dihydroxy-2,5-bis(hydroxymethyl)oxolan-2-yl]oxy-6(hydroxymethyl)oxane-3,4,5-triol?

[@spypruduktion]

The swedish namnes for organic compounds are actually quite funny... Every aldehyde compound basicly ends with the swedish word for "anal" Makes for a bit of giggeling during a lesson

[@barbarabelcher9326]

dewitt green

[@barbarabelcher9326]

find dewitt green singing a playing.organ

[@papisuckmypoosay69]

butanal

[@amithsaranyuds861]

dude you are the best and the coolest chemistry teacher

[@TheRok]

That intro was hiiiiLAAARIOUS!

[@Arizona9001]

dafuk is going on O_O my head hurts. i'll stick to architecture.

[@PPMBlast]

if only .75 speed existed

[@georgebateman3876]

Blast He goes fast so you can get through them all. You're supposed to reverse the video where necessary; that's why they put a table of contents in the description as well.

[@georgebateman3876]

Blast He goes fast so you can get through them all. You're supposed to reverse the video where necessary; that's why they put a table of contents in the description as well.

[@yrf3766]

Blast Video speed controller for chrome ! you can have speeds from 0.25, 0.5, 0.75. 1.25, 1.5 . 2

[@anjalaabner8962]

IT DOES

[@MrAnshulrai]

i love your T-shirts hank! :D

[@RaHuL-sb6uo]

U r one of the best tutor Mr. Hank ❤️

[@MrHSX]

Personally, I hate the 'common names' cause they don't serve any purpose anymore I mean I am never allowed to experiment with the compound in its natural state so why do I have to learn the common name which has no use to me?! And neither is there any other information that I can get from it. So why cant we just get rid of it...! I know its impossible, but at least in school level we can keep it to a minimum The IUPAC is sooo much superior as for many reason Hank mentioned

[@georgebateman3876]

MrHSX What country's system are you on? Here in the UK, we exclusively use IUPAC names in school (at least on my course) at the 16-18 level.

[@MrHSX]

I'm in India In the ICSE board (which is considered an 'international' education board)... And damn you're lucky...

[@georgebateman3876]

MrHSX Well, I have heard that the old names still haven't been replaced in industry, so you might find that you have an advantage if you become an industrial chemist. Otherwise, yeah. Not much fun. They make a real effort to be standards-compliant in UK chemistry courses. The old British spelling "sulphur" is out, and we're told to use the more international "sulfur", for example. I don't mind but it takes a while for the teachers to adapt.

[@MrHSX]

George Bateman Yeah, true dat... Fortunately or Unfortunately, not gonna dive much deeper into the Chemistry field... Lol, that just makes us more confused, to follow British (which we do usually do) or to adopt the growthing US standards... But yeah, I guess it's great for everyone at the end of the day to speak the same language world wide...

[@xboxboy93941]

+MrHSX The reason we still use common names is for the same reason why people call reactions in which electrons are taken away "oxidations" or how one coulumb is not equal to the charge of one electron: scientists in the past started doing things one way, and when they realized there was an easier way to do things, they more or less just kept doing what they were doing. Old habits die hard, you know? It's easier to just create a new system than to overhaul an existing one. Plus, common names are useful in some classes of compounds, like diacids. Nobody calls them by their IUPAC names. Everyone uses common names for those. Just remember, mother makes Oh My Such Good Apple Pie, Sweet As Sugar.

[@xXTheREDCometXx]

Hept>sept

[@ozzigzach7013]

Thankyou so much!

[@chhagankapse3223]

Short and simple,👍👍👍👍👌thanx team crash course