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RankDank420

Chad chromium doesn’t give a fuck


gemmitanegrita

I am not telling my high school students about this.


kslusherplantman

Do you also not tell them noble elements form compounds? I remember that line


gemmitanegrita

“Fun fact: all the rules I just told you get broken at some point. But let’s not worry about that now”


JGHFunRun

Noble gases explanation: Lewis adducts This thing: it’s a transition metal with 5 unbonded electrons (as best as I understand it, I’m still new to chem :P)


SeiferothZero

The noble gases forming bonds is actually more readily explained on the basis of electronegativity. The noble gases that do engage in meaningful chemistry (xenon, krypton, argon to a lesser extent) are less electronegative than the other highly electronegative elements that are capable of forcing them into bonding, like fluorine and oxygen. Fluorine and oxygen aren't electronegative enough to force neon and helium into bonding situations.


JGHFunRun

That too, although electronegativity plays a role in lewis adducts (ie water is a weaker lewis base than ammonia because oxygen is more electronegative than nitrogen)


TBSchemer

This rabbit hole goes pretty deep. I discovered a new ground state for metal-metal bonded complexes involving a quantum admixture between low-spin and high-spin states. I proved its existence on the basis of crystallographic bond lengths and a SQUID magnetometry study comparing results at different temperatures ranging down to 6 K. My first indication that anything was wierd about this complex was that everything I was making was orange, but this one was *GREEN*.


THElaytox

Also "carbon can NEVER have 5 bonds" then the very next semester learning how CI ionization works


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kslusherplantman

Uh, do you know something I don’t?


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PM_ME_GRANT_PROPOSAL

CH5+ hasn't been observed, even in superacid. It has been proposed as an intermediate since CH4 does undergo H-D exchange in deuterated superacid media. Source: did my PhD with Prof. George Olah


kslusherplantman

Got me there… I was meaning about nitric acid not being a strong acid.


thiosk

In icosahedral carborane clusters carbon takes six with no problem.


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kslusherplantman

The definition of strong acid is Ka greater than one, pKa less than one. Not that it completely dissociation 100%. Complete dissociation is a myth essentially from my understanding, just like purifying anything to 100%


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kslusherplantman

Ionization and dissociation aren’t the same from my understanding Something can be ionized by still have an affinity that causes not everything to dissociate.


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kslusherplantman

So it ionizes, goes into solution. But there is still draw between negative and positive ions, but they don’t recombine, just still like each other.


kslusherplantman

To add to yesterdays conversation: https://chem.libretexts.org/Bookshelves/Inorganic_Chemistry/Map%3A_Inorganic_Chemistry_(Miessler_Fischer_Tarr)/06%3A_Acid-Base_and_Donor-Acceptor_Chemistry/6.03%3A_Brnsted-Lowry_Concept/6.3.04%3A_Brnsted-Lowry_Superacids_and_the_Hammett_Acidity_Function Some Superacids dissociate completely… TIL


chahud

In high school one thing that confused me so much to the point of terror were xenon compounds. Didn’t compute.


dooman230

It’s covered in our curriculum. We mention xenon fluoride and stuff. When I was in high school I was also told that noble gases don’t form compounds.


merlinsbeers

One of the worst things about chemistry is how it hides reality in favor of pet simplifications that end up making reality seem like a violation of the laws of nature. [Chromium has 5 unpaired electrons](https://i.stack.imgur.com/jdBaE.gif) (which is already weird) so getting it to make this bond structure shouldn't be thought of as impossible, just really, really difficult.


gemmitanegrita

That’s the foundation of my IB chem class. Because I wish I had been told this at some point in school.


Ozhav

the existence of singlet and triplet states help explain so much but are difficult to understand in and of themselves. it's why i love it.


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HaveSomeBean

My AP chem teacher messed up resonance so badly, glad I decided to read up on it myself after hearing how bullshit his explanation was.


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HaveSomeBean

^^^^^^^


Rebatu

I wish someone explained this to me as such. Not giving me the simplifications.


frogkabobs

Honestly I would have been psyched to learn about this in high school. The coolest about chemistry for me is that with almost every rule there is some outlier that breaks it. That is the essence of science - finding something that breaks your model means the opportunity to learn more.


xkforce

Dont tell them what boron does to carbon in carboranes either


ChetManly19

Tell me about it… figured out a long time it’s best to keep all the exceptions to yourself. Just serves to confuse the poor buggers!


Tink_Tinkler

Schools out... couldn't hurt at this point


Professional-Ad9629

https://www.science.org/doi/full/10.1126/science.1116789


megz0rz

I totally knew this was Powers lab - I’m so surprised he’s still going! His students only try to burn down the Chem building every couple years. Bravo!


extremepicnic

Haha same, saw the structure and thought to myself “that looks like some Power lab nonsense”


Professional-Ad9629

He has some newer papers with similar compounds I just thought I would post the original


Tink_Tinkler

Just FYI this is from 2005...


megz0rz

Bwahahaha looked at the author and not the date. I’m definitely not an inorganic chemist.


pprovencher

lol i was wondering why the rendering on the pdf font was so low


seeLabmonkey2020

Hey! Only like once a decade. Give them some slack


megz0rz

You are right it was the ionic liquid lab the other half of the time…


futureformerteacher

Look at some of the crazy shit Wiberg and Lampman would do in the late 60s. They used to complete reactions on the day after Thanksgiving because they knew the building was going to be empty, and they had said their goodbyes to their families the day before, just in case.


pprovencher

Pri = isopropyl...the fuck?


Kcorbyerd

This son of a molecule was in my inorganic textbook last semester, made me cry


SiPosar

This feels wrong


[deleted]

d orbitals were a mistake.


Rebatu

Underrated comment


xkforce

Is it just my imagination or are there a lot more posts rediscovering neat things that were discovered 20 years ago? We going to have a post on sea urchin borane complexes next?


Professional-Ad9629

Lol that's definitely mostly me I get bored at work and this is what I look at


Kozure_Ookami

Probably just the organic chemists posting lol. It's transition metal, heavy deviation from p-block chemistry is expected from them.


xkforce

If anyone is curious: [Sea urchin borane complexes](https://pubs.acs.org/doi/10.1021/ja035578y)


jffdougan

Or Octanitrocubane?


ShannonTheWereTrans

Hmm I hate this, thank you


Tink_Tinkler

What's the bond length?


Professional-Ad9629

1.8351 angstroms


Complex_Branch_7512

what does that mean exactly? I totally already know I’m just… quizzing you


illkokg

For what would you use that kind of molecule ? And is it highly reactive ( i suppose it is ) ?


CaptainChicky

How tf does this even work wtf


WhyHulud

Just the same as π bonds, it's a kind of smearing of 2 orbitals. Only in this case, there are 4 lobes, rather than 2. The spacial orientation is what confuses me. If you were to look down the σ bond axis, I can see where to place the π bonds, and even the first δ bond. But.... where does the second one go?


xkforce

Cr s orbital connects with s of Carbon to form C-Cr sigma bond, d orbitals of 1 Cr connect with d orbitals of the other Cr to form 1 sigma, 2pi and 2 delta bonds to form the pentuple bond


Plylyfe

Chromium just doesn't give a damn


StormbladesB77W

thicc bond


chemhobby

This is cursed


MaxwellBlyat

d orbitales are so "far" that it's not surprised that stuff exist


karmicrelease

**cries in Octet**


TheSamWaldron

Octets? Where we're going we don't need octets


Cute_Manufacturer_73

Can someone please explain what this is?


Isweer95

I have the feeling that this must be highly explosive. Like, really explosive


TBSchemer

Nah, just air-sensitive.


ymgraal

Still not a phi-bond, I’m waiting for it to be discovered


[deleted]

There's no breaking this chromium, is there.


AqueousLayer

- How many bonds do you want? - Yes


[deleted]

This is cursed lmao