The Periodic Table

A: Why is the para product major in the nitrosation of phenol?

2:18 AM

@GaurangTandon Can you do that professional citation thing for this answer

0

Ortho and para positions are activated due to the +R effect of the $\ce{-OH}$ but the preference of the para product can be explained by the mechanism. The mechanism proceeds through a dienone. The ortho dienone intermediate will experience strain as $\ce{=O}$ annd$\ce{=NH}$ lie in the...

Thanks

Q: How to name binary (inorganic) compounds given their chemical formula, and vice-versa?

2:33 AM

17

I wish to understand how to name binary (inorganic) compounds when given their formula. When I am a given compound like $\ce{B2F2}$ or $\ce{N2O4}$, I have little to no clue on how to write their chemical names. Similarly, I also trip up when trying to convert a given chemical name - say diboron d...

Q: In Reimer-Tiemann reaction why does phenol attack the carbene from ortho position?

2:43 AM

Um uh I have a request for the mods

I just realized that my bounty message is a bit too casual can it be removed

1

From the Wikipedia article on Reimer-Tiemann reation: In step 5, why doesn't the oxygen attack the carbene. The way I see it: upon attacking the carbene from ortho position, the mechanism proceeds via a non aromatic intermediate. Oxygen bearing a negative charge is a good nucleophile too...

organic-chemistry reaction-mechanism carbonyl-compounds

Q: In Reimer-Tiemann reaction why does phenol attack the carbene from ortho position?

1

From the Wikipedia article on Reimer-Tiemann reation: In step 5, why doesn't the oxygen attack the carbene. The way I see it: upon attacking the carbene from ortho position, the mechanism proceeds via a non aromatic intermediate. Oxygen bearing a negative charge is a good nucleophile too...

organic-chemistry reaction-mechanism carbonyl-compounds

3:01 AM

@Zhe you can change the shortcuts as per your wish ;) and enclosing the selection in \mathrm by pressing - say - Alt-R is going to be undoubtedly faster than typing it all out

@AvnishKabaj checking

@hBy2Py requested ping

3:13 AM

@AvnishKabaj just flag it for mod attention

@AvnishKabaj done

@GaurangTandon thanks

Secret

4:15 AM

onlinelibrary.wiley.com/doi/abs/10.1002/anie.201713108

Next time when calculating main group chemistry with ab initio methods, it might help to also include the core electrons explicitly and see if it has impact on the unsaturation

The calculations they used are CAS-SCF

5:05 AM

@Martin-マーチン This question has more than 1k views. Is there anything at all we can do to make those visits meaningful? — Gaurang Tandon yesterday

Anyone?

Abcd

What has happened to this site?

First their used to be no answers, now even questions have almost stopped.

No answers, no questions these days.

Q: Why or why not can hydroquinone and 2H-pyrrole act as ligands?

5:20 AM

2

I want to understand why hydroquinone and 3H-pyrrole can or cannot act as ligands in transition metal complexes. If they are ligands, then what is their denticity? I think the denticity for the second molecule should be 1, since there's only 1 donor atom N, but would it be a weak ligand as th...

coordination-compounds

7:05 AM

@Abcd academic session yet has to begin

In a lot of countries

Questions take a dip around July

Though the number of questions asked this year are slightly lower that 17

Well something is weird

Stats for this month are exceptionally low

2

Q: What are the similarities and differences of adiabatic and diabatic states?

7:52 AM

1

The idea of an adiabatic potential energy surface or adiabatic state is closely related to the Born-Oppenheimer approximation. This has been discussed on this site before in some detail. People frequently talk about diabatic states as well. It seems based on the reading I have done that a diabati...

theoretical-chemistry

8:08 AM

@AvnishKabaj you were running SEDE, which updates its database only every sunday. so those 186 questions are till 10th June only. Roughly tripling to 650 questions in this month, including the spike for monthly unit tests...Hmm that's still very low compared to last year :(

8:35 AM

**Is there a list of all websites where people can ask chemistry questions?** (aka websites which may be driving our traffic away) I made a small list:
1. Conceptual: Quora (_coughs_) and more?
2. Homework help: Chegg, AskIITians, Meritnation, brainly.in and several such Indian homework help forums.

(We needn't worry ourselves with homework help forums though because they don't hurt our traffic)

8:47 AM

@GaurangTandon Ate you going to hacke em

@AvnishKabaj i'm going to try figure out how many expert chemists they have and why they are there

1:58 PM

@GaurangTandon Yeah but that doesn't help

I have to come up with the shortcut and remember it?

2:33 PM

@GaurangTandon um uh ok

A: Identifying 5 unknown substances

3:43 PM

0

+1 to @JannesAndreska's comment-You are correct my friend-Actually $\ce{PbCO_3-PbO+CO_2},$\ce{PbO_2}$ is not at all formed in the reaction,so that's incorrect

@ JannisAndreska-Please turn it into a comment on your comment — user65214 14 mins ago

Commentception

A comment on an answer that should have been a comment for another comment

5:27 PM

@Zhe well it isn't really as hard as you think it is... I've been using it for a while, you would barely need more than six shortcuts on Chem.SE, and it almost became a reflex action for me within two days

@AvnishKabaj xD

@GaurangTandon Do you know how many shortcuts I need to remember for all of the different applications I use?

:/

@Zhe oh well... :( so you're asking that the userscript should give a button in the toolbar to use all those functions?

I can do that I think

Didn't try yet though

@GaurangTandon No I'm not

I'm saying I can't imagine ever using this because the cognitive overhead of remembering more shortcuts is high

It's just easier for me to type it out

Though other people may find this tool very useful

Especially if you don't remember the LaTeX commands

Alright then

I personally can't live without it though, I find it faster to just highlight text and press a hotkey :)

5:42 PM

@GaurangTandon All the more reason to have it

Some times you have to build your own tools

@Zhe yep, that's why I feel great at being able to build a userscript, being able to suit any and every webpage to my own needs

btw, please have a look at: "Is there a list of all websites where people can ask chemistry questions? (aka websites which may be driving our traffic away)" do you know of such public forums which the grad/phd chemists might be using?

?

6:08 PM

@GaurangTandon I don't understand this question

Most people don't ask questions on the internet

then what do phd or grad students do to solve their queries?

or they don't ever have queries? (a bit unrealistic)

@GaurangTandon Your best bets are, in no particular order: (1) ask someone else in lab, (2) ask your professor, (3) consult a text reference, (4) do a literature search

Searching on the internet is generally pretty useless

5

That's not how academics work

They like real sources, which basically translate to (3) or (4)

hmm asking on the internet may give it the "many eyes effect"? Basically, when more than one person has a look on a particular problem, they will come up with more than one good way to do it. So, you can distribute the problem among the people on the internet, they all can try figure it out, and come up with different ways. At least that's what I think should happen.