The Periodic Table

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03:02

!!img/silver perchlorate

Chemobot

5 hours later…

Secret

08:08

!!img/squalene

Chemobot

Secret

!!img/squalane

Chemobot

Secret

!!img/squarane

Chemobot

No result found.

Secret

08:08

!!img/cubane

Chemobot

Secret

!!img/dicubane

Chemobot

No result found.

Secret

!!img/nitrocubane

Chemobot

Secret

08:09

!!img/octanitrocubane

Chemobot

Secret

!!img/tesserene

Chemobot

No result found.

1 hour later…

DHMO

09:27

is it more efficient to do esterification through the conc. H2SO4 pathway or the acyl chloride pathway?

DHMO

10:01

We can react acyl chloride with ammonia to form amine... can't we remove an amine group?

1 hour later…

paracresol

11:15

@Kaumudi.H Ohhhhhhhhhhhh! That one...I'm still cracking up over that! X'D

user228700

Sure -_-

paracresol

For reasons, I don't really understand, I feel immensely gratified when I'm able to piss you off :D

user228700

Alas, although I may come across as pissed off, I don't give almost random strangers on the internet any power over my feelings :-]

paracresol

@Kaumudi.H Hey, it's just that you tend to over-react to stuff I say...whatever I said/typed, it was in jest. Geez, I'm sorry if you're the extremely delicate type ;P

@Kaumudi.H O_o

@Kaumudi.H That last edit was scary :O

user228700

@paracresol I'm not sure whether that ^ is an apology or if it's another one of your attempts to piss me off. In any case, it's okay. I'm certainly not as delicate as you think. Perhaps it's just your tendency to try to piss me off that really sort of annoys me. Almost. Whatever :-P

paracresol

11:22

@Kaumudi.H It was an apology ._.

user228700

I feel that sometimes, you say provocative crap just to see if I would react :-P But I don't know if that's really the case or if we're genuinely complete opposites in literally every way.

paracresol

( @ortho's watching this from his corner...I hope I don't get suspended -_- )

@Kaumudi.H Nope, we're definitely opposites ._.

user228700

Okay :-P

paracresol

So, moving on to more important things...

I'VE GOT MORE HAT'S THAN YOU! HAH!

user228700

:-) I didn't try. @SirCircumference is really the only reason I've got at least 9 hats.

paracresol

11:26

@Kaumudi.H Um...well... my top hat's shinier than yours ;D

user228700

@paracresol So this is an attempt to lighten the mood(a.k.a crack a joke)?

paracresol

@Kaumudi.H Nope...that's just me trying to piss you off X'D

user228700

x'D Aha! Exactly!

user228700

I'm sorry to burst your bubble man, but I honestly don't get pissed off that easily.

user228700

Oh, and I assume that ur denial of my gender is also an attempt to piss me off? x'D

paracresol

11:28

@Kaumudi.H Was that an invitation to try harder?

user228700

@paracresol Invitation is the wrong word--it's up to you.

user228700

Why tho? Why are u trying? :-P

paracresol

@Kaumudi.H Nah, most people I talk to often here are human males ( at least I hope @Jan is ) so I "accidentally" keep referring to you as a "he" :/

@Kaumudi.H What makes you think I'm trying? 3:D

user228700

4 mins ago, by paracresol

@Kaumudi.H Nope...that's just me trying to piss you off X'D

paracresol

Jan 1 at 17:18, by paracresol

@Kaumudi.H Yup, you've got wonderful memory :3

user228700

11:33

Nah, that's just me trying not to be absent-minded, boi.

user228700

Anyhoo, how's prep.?

paracresol

It's ...going ._.

Boards this March, wish me luck!

On second though...don't

user228700

What? Why not? .__.

user228700

U're Bio Math, right? (Since u were complaining about Math before)

user228700

Are ur practical exams over?

DHMO

13:25

Is there correlation between strength as nucleophile and strength as base?

Chemobot

13:44

edited !

orthocresol

@DHMO As long as the donor atom is the same, there is a general correlation.

However, consider HS- and HO-. HS- is a better nucleophile but HO- a better base.

DHMO

@orthocresol is ethoxide a strong base but a weak nucleophile?

orthocresol

Ethoxide's a pretty decent nucleophile in its own right

DHMO

@orthocresol why is HS- a better nucleophile?

strong base promotes elimination (E2) while strong nucleophile promotes substitution (SN2)?

orthocresol

Sulfur's 3p orbitals are higher in energy than oxygen's 2p orbitals.

Consequently, there's a better energy match with the empty orbitals of an electrophile.

And yes, in general, that is the case with E2 vs SN2.

DHMO

13:53

but if there is a correlation then... they pretty much happen 50-50?

orthocresol

Yes, it's possible to get a mixture of products.

DHMO

So we would need to use concentration (of base/nucleophile), heat, and solvent to control the favoured product?

orthocresol

Yeah, pretty much.

DHMO

thank you

4 hours ago, by DHMO

is it more efficient to do esterification through the conc. H2SO4 pathway or the acyl chloride pathway?

orthocresol

Depends on your molecule. Chucking conc H2SO4 at a molecule may not always be the best way to go.

DHMO

13:58

e.g. ethanoic acid + ethanol?

orthocresol

oh well, that one you can use anything you like

DHMO

then what are the circumstances that we cannot use the conc. H2SO4 pathway?

orthocresol

if you have something that is acid-sensitive

DHMO

oh, like a carbon-carbon double bond?

orthocresol

say, idk, an epoxide?

DHMO

14:00

I know nothing about epoxides lol

4 hours ago, by DHMO

We can react acyl chloride with ammonia to form amine... can't we remove an amine group?

4 hours later…

Bounty Hunter

18:01

Q: Rates of Keto-Enol Tautomerism

Are there any databases with rate constants for keto-enol tautomerism in small molecules? I'm looking for rate constants if possible.

3 hours later…

Jan

20:40

@paracresol Not sure if I should be sad, happy, glad or laughing.

Hm, someone was removed again.

Loong

21:00

@Jan Did it hurt your reputation?

Mithoron

@Loong Looks ron lost over 100, but is it much difference fo him...

A---B

$b = 4 \text{Volume}_{molcule} \times N_a$ or $b = \text{Volume}_{molcule}\times N_a$. b is van der waal constant. ?

Loong

21:23

@A---B The usual interpretation is four times the volume of the particle.

Jan

@Loong Yeah, I lost about 0.2 % of my rep ;)

Loong

21:57

> Apparently, compounds with a higher molecular mass have a boiling point.

That's correct, but I think the sentence is missing a word. ;-)

Mithoron

@Loong :D

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