The Periodic Table

Avnish Kabaj

12:11 AM

@GaurangTandon I meant case 2

@Abcd If you go to sleep at 7 and wake up at 5 won't that pattern mess up with your exam

Abcd

@AvnishKabaj ... I have no idea whats happening right now...I am completely messed up and clueless...

What is a half blind chemist?

Mathew Mahindaratne, College Station, TX, USA

109 3

Mithoron

12:27 AM

@M.A.R.ಠ_ಠ It just got bad answer :(

Abcd

12:42 AM

55 mins ago, by Abcd

Why is there no "too broad" flag option?

OH!! Sorry guys! please ignore this message!! Really sorry!

Gaurang Tandon

@M.A.R.ಠ_ಠ i have read we must have dinner at least two hours before sleep time

@AvnishKabaj what are you even saying? :/ there was never any hexyne anywhere...

Avnish Kabaj

1:13 AM

@GaurangTandon cyclohexyne

Abcd

@GaurangTandon i think bold is fine...Why did you remove that with the edit?

Gaurang Tandon

1:37 AM

@Abcd there were only three sentences in your question and you boldened one of them; and since that bold part was a repeat of the new title, I felt no reason to leave it boldened

feel free to edit it in back though

@AvnishKabaj "cyclohexyne undergoes tetramerization to yield the dimer (40)"

from that book

both 36 and 37 are enclosed in square brackets and are transient intermediates

Avnish Kabaj

2+2=4

@GaurangTandon theres a single arrow

Not a double one

Gaurang Tandon

@AvnishKabaj you mean an equilibrium one?

Avnish Kabaj

@GaurangTandon no no not that

The one which is used for reversible structures

I mean

<->

And not

<=>

The arrow used there is ->

Gaurang Tandon

yeah so it's correct because both are required for the sequence, first dimerize then tetramerize; but don't you see the square brackets? neither of 36 or 37 is isolated and neither is more stable than the other

how do you even compare anti-aromaticity with ring strain

:-O

Avnish Kabaj

@GaurangTandon I can't I'm just interpreting the mechanism

You do know that anti aromatic compounds exist

Gaurang Tandon

1:46 AM

now i am curious, they do exist?

gimme an example

Avnish Kabaj

@GaurangTandon not for long they rearrange ofc

hBy2Py

2:18 AM

And we like to gripe about our dreck that hits HNQ, @M.A.R.ಠ_ಠ...

1

Q: Is there any harm of leaving Ethernet outlet unplugged?

I was wondering if leaving an active Ethernet port with no plug in it was safe . We have one in our kitchen right next to our face level and I was wondering if leaving it unplugged in the open was safe like does any radiation or infrared laser/light come out of it. Might sound very paranoid but I...

ethernet port

Gaurang Tandon

@AvnishKabaj so they are unstable right?

hBy2Py

@santimirandarp Depends on what you have in mind, really.

Avnish Kabaj

@GaurangTandon yeah I'm not disagreeing with your answer

Gaurang Tandon

@AvnishKabaj okay...

Avnish Kabaj

It's just that a very unstable compound won't make a more unstable compound

Gaurang Tandon

2:23 AM

okay...now I get it....yep it should be that way...you could write in your answer to make this more explicit (" The second compound....which you've drawn is more stable because so and so.")

apart from that, it's fine ^_^

1,3-feeds

0

Q: How to properly reject suggested edits that add mathjax to the title?

This happens once or twice every week with little variation: Let's go through the situation quickly: A new user has his first attempt at improving the content of an SE post. He puts up a decent attempt, and adds an edit summary highlighting what he did. So far, so good. But, they add mathjax...

discussion suggested-edits

Avnish Kabaj

2:40 AM

@GaurangTandon Sure

Gaurang Tandon

6:32 AM

@AvnishKabaj that recent table you inserted - 10/10

great!

Akash. B

6:44 AM

Why water splits into hydrogen and oxygen when we pass electricity through it?

hm

Avnish Kabaj

7:17 AM

@GaurangTandon thanks : )

Gaurang Tandon

7:43 AM

@Akash.B that's called ionization; you pass electricity, ions are formed from neutral molecules

@AvnishKabaj welcome

Nehal Samee

10:06 AM

Can anyone help me regarding this ?

-3

Q: Indicator at neutralization point

Which indicator is suitable to be used at the neutralization point of $NaHCO_{3}$ and $HCl$ ? Please state some reasons behind it . Some told me about phenolphthalein , but I am not sure if it ...

redox

Avnish Kabaj

10:23 AM

5

Q: Why is phenolphthalein an appropriate indicator for titration of a strong acid with a strong base?

How does the pH at the equivalence point, as well as the pH range over which the colour of phenolphthalein changes, make it a suitable indicator for titrations between strong acids and strong bases?

acid-base titration

Ok that's not relevant my bad

Akash. B

10:52 AM

IF so if we pass electricity through NaCL it doesn't split into Na and CL what may be the reason for this?

Avnish Kabaj

12:32 PM

@Akash.B chem.libretexts.org/Under_Construction/Core_Construction/…

Abcd

@AvnishKabaj Quick question: Bromination of N-Methyl anniline, whats the major product according to you?

@Akash.B Cl*

Avnish Kabaj

@Abcd sunlight?

Or alcl3

Abcd

@AvnishKabaj $\ce{AlCl3}$

Avnish Kabaj

@Abcd meta?

Tell me the answer

Abcd

@AvnishKabaj Only para

Avnish Kabaj

12:46 PM

@Abcd chalo that's good

I was legit confused why were you asking this question

Abcd

@AvnishKabaj Hmm wait, the problem is:

in Room for Abcd and Secret, 1 min ago, by Abcd

And because $\ce{-NHCH3}$ is very similar to $\ce{-NH2}$ I felt that it should be at all three positions in its case too

Avnish Kabaj

@Abcd steric crowding at ortho

Abcd

@AvnishKabaj Was expecting that, but are you sure?

Avnish Kabaj

@Abcd yeah

Abcd

@AvnishKabaj Okay fine!!!

Avnish Kabaj

12:51 PM

Any other o chem questions?

Abcd

@AvnishKabaj I'll ping you when I have them!

Avnish Kabaj

Ok

Bounty Hunter

1:12 PM

-1

Q: Hyperconjugation in ethane conformers

I refer you to this set of presentation slides. On slide 8, the author explains the preference for the staggered conformation of ethane by saying that there is a favourable hyperconjugative interaction between $\sigma^{}_{C-H}$ of the C-H bond in one methyl group and $\sigma^{*}_{C-H}$ of another...

organic-chemistry molecular-orbital-theory conformers hyperconjugation

Abcd

1:33 PM

in Room for Abcd and Secret, 25 mins ago, by Secret

I suspect purely electronically, the reaction will be the same as the aniline case, except much faster (since you have a methyl on the amine which has a lot of electron density to donate to the pi system)

@AvnishKabaj ^^^

Avnish Kabaj

2:03 PM

I think the extra methyl group is enough to tip the sces and make the para isomer major

Can't be sure

Tho never seen the reaction anywhere

Nehal Samee

2:22 PM

Any help here ...

0

Q: Calculating Kp in two different ways

The degree of dissociation of $NH_3$ at $\pu{1 atm}$ is 20 % as follows: $$\ce{2NH3 <=> N2 + 3H2} $$ I follow two ways but end up with two different answers. Here, I assume that initial amount of reactant mole is 2 and this rod produces 0. Then I take the amount of ammonia in equilibri...

equilibrium

Nehal Samee

2:36 PM

Any help in the above question...?

Gaurang Tandon

2:56 PM

@NehalSamee what do you mean by "this rod produces 0" in your question?

M.A.R. ಠ_ಠ

@GaurangTandon We should, but who listens to that stuff

Nehal Samee

Sorry ... That's a mistake @GaurangTandon...

Bit can you help me ..? @GaurangTandon...

M.A.R. ಠ_ಠ

3:14 PM

@NehalSamee If you still have a problem why did you accept an answer?

I am momentarily on a computer, and I probably want to post some meta thingy.

What should I post?

Avnish Kabaj

An editing index and obvious do's and don'ts

M.A.R. ಠ_ಠ

@AvnishKabaj We already have something similar; hidden points of editing

Avnish Kabaj

@M.A.R.ಠ_ಠ that's fancy tricks

Pentavalent carbon gave a very good approach for fixing homework problems

Gaurang Tandon

@M.A.R.ಠ_ಠ you could post another question about tags

i have three drafts ready

@NehalSamee if it is, then please correct it; what is it supposed to be?

or you could organize all different meta posts in a neat big list

Avnish Kabaj

@GaurangTandon yeah that

Gaurang Tandon

3:26 PM

i found lots of hidden gems while scouting meta-2017-questions

Avnish Kabaj

Chemistry editor's guide to the Galaxy

Gaurang Tandon

felt they could be better organized under different sections like editing, closing, question posting, blah

@AvnishKabaj yeah, more like "Chemists' guide to their community" ;)

nice alliteration also

Avnish Kabaj

:P

M.A.R. ಠ_ಠ

@AvnishKabaj which is?

Nehal Samee

@M.A.R.ಠ_ಠ ... You will notice that I've recently started a discussion today ... After finding a new way of the question ..

Gaurang Tandon

3:30 PM

@NehalSamee yep you did but the green checkmark explicitly indicates to people that your query is "solved"

kindly untick it if your query is unsolved

Nehal Samee

@GaurangTandon ... I'll clear it out . That's not a major thing ... But it would be helpful for me if you could clear out my doubt ...

M.A.R. ಠ_ಠ

*my question

Gaurang Tandon

@NehalSamee ofc but please edit your question first

M.A.R. ಠ_ಠ

"doubt" is not countable

That's the 4729th time, people

Gaurang Tandon

@M.A.R.ಠ_ಠ take it, 4730th - chemistry.stackexchange.com/questions/93715/…

"a lotta doubts"

the "doubt"-army will win over you grammar-perfectionists one day

mark that

M.A.R. ಠ_ಠ

3:31 PM

@GaurangTandon The thing is, whatever meta post contains should be unique, and not found anywhere else

@GaurangTandon NEVAR

Avnish Kabaj

in Spring Cleaning, Mar 11 at 15:56, by pentavalentcarbon

1. is it ok for it to stand alone, as-is, just by removing the hw tag, with no other edits?

Gaurang Tandon

@M.A.R.ಠ_ಠ there currently is no single, actionable, organized list of all important meta posts divided by sub-categories

Avnish Kabaj

See the transcript

@GaurangTandon start a community wiki

M.A.R. ಠ_ಠ

@GaurangTandon You'd start to realize what you want is just a part of your diary to document what you know about the SE model. That's how I felt anyway.

Nehal Samee

@GaurangTandon ... I've done that .

Will you proceed ?

M.A.R. ಠ_ಠ

3:34 PM

@AvnishKabaj That's about the tag, not how to prevent me no likey HW close votes

Which isn't a big deal

Gaurang Tandon

@M.A.R.ಠ_ಠ no, I didn't mean to curate my diary, I meant to curate an open diary for all new folks willing to get more involved in the administrative aspects (editing/closing) of this site as well as very new folks trying to put together good questions

Avnish Kabaj

¯\_(ツ)_/¯

Gaurang Tandon

in separate sections, ofc

M.A.R. ಠ_ಠ

@GaurangTandon And how will it be different from what's already documented?

Avnish Kabaj

@GaurangTandon Why don't you start a meta discussion on the diary thing first

You're legit talking only to mar

Gaurang Tandon

3:36 PM

@M.A.R.ಠ_ಠ it will be a list of everything that's already there, just waiting to be found

@AvnishKabaj i may, but not now, especially given there are several unresolved meta discussions already

M.A.R. ಠ_ಠ

@GaurangTandon Then it would be too long to read. I get it, this is sparked by the info being in too many different places, but a single post can't solve everything

Plus, it's too big a project and you just can't get it as right as you want

Gaurang Tandon

@M.A.R.ಠ_ಠ yep; it isn't supposed to "solve everything", it's just supposed to "link" to the existing content

M.A.R. ಠ_ಠ

OK, I gotta leave. The new year is about to begin!

Gaurang Tandon

@M.A.R.ಠ_ಠ CWiki ;)

@M.A.R.ಠ_ಠ oh that's great have a good new year night!

M.A.R. ಠ_ಠ

@GaurangTandon Who'd be bored enough to contribute . . . OK, I really should get going

Merry new Iranian year everyone! AKA happy nowruz!

5

Avnish Kabaj

3:40 PM

@GaurangTandon those are boring

Tbh this will also be boring

2 mins ago, by M.A.R. ಠ_ಠ

@GaurangTandon Who'd be bored enough to contribute . . . OK, I really should get going

I agree with that

Gaurang Tandon

well when there's no good, new questions to answer, anyone could spend that extra time curating that list...

Avnish Kabaj

@GaurangTandon that's true but that sort of a major project requires a looooot of community participation

Gaurang Tandon

@AvnishKabaj ofc...

Transcript for