The Periodic Table

7:32 AM

\o @San

How're you doing?

I'm chit-chatting in Shadow's Den, and I'm about to leave in five minutes. :\

i be alright, you?

I'm fine. You can go and chat with them.

I need to go now. @San here's the link: chat.meta.stackexchange.com/rooms/721/shadows-den

have a good day/evenng!

1 hour later…

8:46 AM

heh

2 hours later…

A: Bond dissociation energy of carbon dioxide

11:11 AM

That was a quick downvote. :-o

-1

The bond dissociation energy is the energy input required to homolytically break a covalent bond. For carbon dioxide, the reaction is thus: $$\ce{O=C=O -> O + CO}$$ If we can determine the enthalpy change for this reaction, we have also determined the bond dissociation energy. This specific rea...

I could not even read the answer in this time.

3 hours later…

2:15 PM

@Loong Some people downvote the answer too when they downvote the question, so it'll get deleted.

2:29 PM

hello o/

@PH13 hi

everything fine everywhere?

Last I checked it was.

Welcome to chemistry.SE! If you had any questions about the policies of our community, please ‎visit the help center. It would be really appreciable if you elaborate/find sources that back up your claim. Currently, half of your answer is not really informational and could be deleted without any significant loss of info. — inɒzɘmɒЯ.A.M 20 mins ago

@inɒzɘmɒЯ.A.M First, I thought that you want to place this text in the FAQs – before I realized that this is a comment to an answer.

2:35 PM

That's . . . actually a good idea!

@Todd capitalization pet peeve: Why do the excerpts of some tags begin with a capital letter and some don't?

Q: what makes an xray machine's white photographic film go black?

2:56 PM

I understand that xray images are black and white, you have the xrays themselves, the white film, and an object/ person in between. The white being bones / things the xrays couldn't get through, the white film remains white, and black being where the xrays did pass through, and it blackens the w...

silver

> (I didn't know how to tag this so I tagged it silver 'cos apparently that's one of the things in photographic film)

Facepalm

Says a guy who has two gold famous-question badges. :'O

This is why badges are broken. ಠ_ಠ

seems so

@inɒzɘmɒЯ.A.M - dunno - this is in reference to the "silver" tag?

This is in reference to my last message.

I have no idea who I'm referencing.

oh, the X-ray question

looks like more of a physics or photography question

@inɒzɘmɒЯ.A.M - to your question, I don't know why some excerpts of some tags begin with a capital and some don't - probably a remnant of how they were created?

Mithoron

@inɒzɘmɒЯ.A.M Bad movies or books are popular so bad questions too.

3:04 PM

Yeah, that makes sense.

chemistry.stackexchange.com/posts/34987/revisions

facepalm

Please use the mhchem package for $\LaTeX$ formatting. Chemical formulas and equations mustn't be slanted. — inɒzɘmɒЯ.A.M 20 secs ago

I now use "slanted" rather than italicized. I'm a really $\LaTeX$ guy. ᕙ(⇀‸↼‶)ᕗ

@Mith about that question, I'm not sure the guy will understand us, because he (?) even typed BF4^-1 ion. (!!!)

One that doesn't know how to write the charge of an anion isn't qualified to study bonding yet IMO.

Mithoron

@inɒzɘmɒЯ.A.M Who knows ;)

4:09 PM

@PH13 I think, I found out why ChemDraw 2012 and ACD/ChemSketch yield different names for DDT. Apparently, it is not a change in IUPAC rules from 1993 to 2013; ChemDraw has probably one shortcoming here.

so ACD is the better choice for naming stuff

BURN CHEMDRAW

I think, ChemDraw 2012 ignores this IUPAC rule: "The numbering of the identical parent structural unit is retained and, when there is a choice, the locants of the point of substitution by the linking multiplicative substituent groups on the identical parent structure are as low as possible."

question for you guys on a suggested edit i'm looking at - someone has come in and edited a closed question to be a different question entirely - what do i do here?

That looks bad. ChemDraw is dead/

@ToddMinehardt Link.

Q: Temperature of pure oxygen combustion

4:12 PM

-10

I'm wondering what the temperature of pure oxygen being burned is.

combustion

i rejected the edit on the grounds that it didn't improve the question - but like i said, i'm not entirely sure what to do in this case

@ToddMinehardt Reject: clearly conflicts with author intent

ok thanks @inɒzɘmɒЯ.A.M

hi @MadScientist, don't believe we've met

@Loong what's the name from CD 2012?

@ToddMinehardt No PrOBLeMO

@ToddMinehardt He just comes and goes. He usually doesn't talk.

(He has a tab open)

ah i see - ok

4:17 PM

@PH13 I made a test with 1,1'-oxybis(4-bromobenzene), which is explicitly mentioned in the Blue Book. ACD/ChemSketch gets it right, but ChemDraw 2012 names it 4,4'-oxybis(bromobenzene).

@Loong CD suite 13 also does that ... not good

The same for DDT: The correct name is 1,1'-(2,2,2-trichloroethane-1,1-diyl)bis(4-chlorobenzene) but ChemDraw 2012 names it 4,4'-(2,2,2-trichloroethane-1,1-diyl)bis(chlorobenzene)

Rampage mode initiated

Oh gosh is it just me or is chat now BOLD overflow?

@inɒzɘmɒЯ.A.M IT'S JUST YOU

EVERYTHING NORMAL OVER HERE

4:21 PM

ಠ_ಠ That means the rest of the world consists of blind people.

@Loong you could write them an email

This is not a change from 1993 to 2013. The 1993 recommendations include the same rule: The numbering of the identical units and the principal characteristic group is retained, and when there is a further choice the points of substitution by the di- or polyvalent substituent group are numbered as low as possible.

This just proves that all Germans make good detectives.

@inɒzɘmɒЯ.A.M I think that 1...3 germans are enough to extrapolate for 80 mio

Who's mio?

4:25 PM

@inɒzɘmɒЯ.A.M میلیون

Yeah I get it! SHEESH