#molecular geometry

[leatheslay]

girl you're looking so. tetrahedral today :3

[polarmolecule]

molecular geometry my sweetheart my baby. electron orbitals kill yourself.

[explainedchemistry]

sp2 Hybridization: Covalent Bonds Course (19)

Course Chemical Bonds: Covalent Bonding and Shapes of Molecules (19) Hybridization sp2 Hybrid Orbitals—Bond Angles of Approximately 120° In sp2 hybridization, the s orbital hybridizes with two p orbitals. We say “2” indicating the number of involved p orbitals. Notice, this leaves one p orbital unhybridized. This orbital typically forms the pi covalent bond. Here, carbon is sp2 hybridized,…

[dripisdaidiot]

Surv is Chemistrying

[queer-reader-07]

been brushing up on electron & molecular geometry because i'm so cool and sexy like that (read: am about to do ochem) and as a result my dad is being made to sit through me going through a whole table of common shapes from memory with interludes featuring me explaining why water "looks like that"

[artastic-friend]

Currently in that “I hate everything” phase of my chemistry homework...

Who invented Lewis dot structures and molecular geometry and why?!? /j /neg /rh

[glassamphibians]

dipoles my greatest enemy

[yisanged]

it's so over for me guys. we're so done for. i cried today after my bassoon lesson because it was really embarrassing it's been so long since i've practiced i did so shit. it's because i'm busy with school but my teacher doesn't know that she probably thinks i'm just flaky and shit at bassoon. which is sort of true but it makes me sad. i actually tried my hardest to practice the d flat major scale which i've been on since like july and i sort of got it but then she tried getting me to do d major beforehand out of nowhere and i couldn't because i forgot like all the fingerings and that threw me off so hard i couldn't get the d flat scale. fuck my stupid baka life

[sidewalkchemistry]

Abundance always begins from the miniscule.

[swannieluv]

I hate chemistry...

[buttfrovski]

WHAT THE FUCK WAS THAT-

7:30am chem final today

[studyingselene]

august 14, 2024 - trying to find ways to memorize these molecular geometry shapes

༊࿐ ͎. ｡˚ ° ⊹ ˚.

14 de agosto de 2024 - estoy intentando encontrar la forma de memorizar estas geometrías moleculares

[tanadrin]

So obviously even if life arose on another planet that was chemically very similar to the primordial Earth it would not use the exact same biochemical arrangements. There are lots of simple sugars that could form genetic polymers, even ones with a helical structure, and lots of different possible nucleobases, and even the correspondence between codons and amino acids (including what amino acids life uses in the first place) are arbitrary. As long as everything is water soluble and the bonds aren’t so weak that big organic molecules fall apart nor so strong that you can’t take them apart to reuse (or get any kind of stochastic changes at all to drive Darwinian evolution), it’s mostly a question of what particular chemical combo your alien microbes happen to land on, with an assist from molecular geometry and stuff.

A lot of this has been played with experimentally—xenonucleic acids and unnatural nucleobases and such—but of course mostly with an eye to doing practical stuff like antisense therapies or studying the history of life on Earth. What I have a less good sense of is what kind of chemically-similar-but-totally-historically-distinct developments you could get in such a scenario. Could you have a genetic molecule based entirely on amino acids? Are there other organic macromolecules that could be efficient ways of storing genetic information? Is it absolutely necessary to have genetic information be totally distinct from proteins in the first place—could you have some kind of system where certain critical proteins built copies of themselves and other important functional proteins?

I don’t see an immediate reason why not, but I really don’t know enough about molecular biology to be confident in that assessment, much less what such structures would look like!

[chemblrish]

hii how are you? I'm currently studying inorganic chem, mainly coordination compounds but it's proving difficult. I'm unable to fully grasp what's going on. Can you please advise me on coordination compounds and inorganic chem in general? thank you!!

Hi!

Inorganic coordination chem is part of my thesis, you've come to the right place :) Also, I'm going to make this a university-level thing - I didn't study coordination chem in school, so I'm assuming that's the level you expect - but if you actually need advice on studying high school inorganic chem, please let me know!

First, a textbook rec: I studied off Cotton's Basic inorganic chemistry a lot and I liked it. My professor recommended Atkins' Inorganic chemistry too; I admit I didn't use it that much bc I also had some Polish textbooks I found very helpful, but from what I did see, it seemed very comprehensive and in-depth - so if Cotton isn't enough, Atkins might be better for you.

Inorganic chem

orbitals matter: I think it's important to grasp orbitals and hybridization before going any further. This stuff keeps coming up again and again, so if you find yourself struggling with understanding concepts in inorganic chem, I'd suggest making sure you understand atomic and molecular orbitals first.

periodic table trends: please don't memorize them. Please. Understand them. There's a reason why, for example, atomic radii decrease within periods even though both electrons and protons are added as you move to the right (the screening effect - and again, orbitals!). Once more, I liked the way it was explained in Cotton's textbook.

I found flashcards very helpful for studying the properties of the elements and their compounds as that's mostly memorization. Same for HSAB, really.

if your inorganic chem course covers elements of group theory too, here is a website my thesis supervisor told me about :) I think it's pretty great. If you're digging really, really deep into it, Cotton has a whole textbook on group theory in chemistry (Chemical Applications of Group Theory), but I doubt you'd need it for a basic inorganic chem course.

I've also answered an ask on studying chemistry in general - perhaps you'll find it useful too.

Coordination chem

surprise, surprise: ✨ orbitals ✨. Once more, to understand what's going on with coordination compounds, first you need to understand the molecular orbital theory well.

metals oftentimes have a preference for a specific coordination number. Frequently, a whole group will have a preference for the same CN (group 7 ions, for example, prefer CN = 6). That doesn't mean other CNs don't exist, but knowing there's a pattern can be helpful while studying.

coordination numbers aren't totally random. The rules may not be strict and foolproof, but again, there's a general pattern that's worth keeping in mind: bigger ion usually = higher CN (duh?), CNs are usually even (and we still don't really know why that's so! Although it may have to do with geometry and symmetry) and sometimes depend on the charge of the ligand.

crystal field theory. Okay so CFT is really cool, but I see how it can be super confusing too. I'm not sure how deep you have to dig into this stuff for your course, so apologies if I go a little overboard 😅 My advise for studying it would be:

try to visualize the given complex, actually see the position of the ligands in relation to the orbitals

remember: it's all about lowering the energy. That's the core of CFT. Pauli's exclusion principle always, always stands, but CFT tells us coordination compounds are systems that "want to" have the lowest possible energy so bad they'll sometimes break Hund's rule to obtain it

keep in mind CFT is only a model. Some parts of it may not make any sense to you (like the fact it treats all metal - ligand bonds as purely ionic). It just so happens that despite its many simplifications that are obviously not true, CFT still accurately describes many complex compounds

I've had an ask on studying nomenclature, too.

again, I don't know how complex (pun not intended) you need my tips to get, so if you have any specific questions, feel free to hmu :) I'll try my best to explain

[cbirt]

Molecular geometry modeling, which involves building models that show the spatial arrangement of atoms in a molecule, usually helps with this understanding. The field of molecular modeling has been transformed by geometric deep learning. However, due to molecules’ inherent 3D shape and the intricate interactions between their constituent atoms, standard deep learning algorithms need help to solve this challenge. While the current generation of neural network models approaches ab initio accuracy for molecular property prediction, high computing costs, and insufficient geometric information usage have hampered their use in drug development and molecular dynamics (MD) modeling. 

Microsoft researchers introduced ViSNet, an equivariant geometry-enhanced graph neural network that predicts molecule structures with minimum processing costs while elegantly extracting geometric features.

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[sarcasticmothdraws]

Taking a break from molecular geometry shit to say Sollux or TZ for Trickster Mode (I’d suggest Alpha Dave, but my irl is here now and he would hunt my ego for sport)

Of course you would want to suggest A!Bro pfft.

But we got the fundip boy!

I'm blasting Education Connection in my ears rn