1337 oclock

by h20xyg3n • 15 Jun 2011, 13:37 • Journals
Bitches.


---------------------------------------------------------------------------------------------------------------------------

EDIT: So hey I just installed Brink (skidrow ofc) pretty crap isnt it?
Comments
46
▼
spiROZE 15 Jun 2011, 14:38
ethanol + butanal (in a concentrated H2SO4 solution).. how do these react with eachoter.. pls tell me someone :DD
▼
Complex 15 Jun 2011, 14:39
http://www.google.be/search?sourceid=navclient&hl=nl&ie=UTF-8&rlz=1T4DABE_nlBE289BE289&q=ethanol+butanol+H2SO4
Parent
▼
spiROZE 15 Jun 2011, 14:47
I've already searched on google and didn't find anything that could help me with it
Parent
▼
Complex 15 Jun 2011, 14:56
is héél lang geleden maar ethanol en buthanol zijn beide brandstoffe en H2So4 is extreem zure omgeving dus ik vermoed dat...
Parent
▼
spiROZE 15 Jun 2011, 14:58
?

het is trouwens butanAl en niet butanOl
Parent
▼
b4lu 15 Jun 2011, 15:27
must be a Sn2
Parent
▼
spiROZE 15 Jun 2011, 15:38
je bedoelt van een alcohol naar een ether gaan door een substitutie2 ? Dan heb je 2 alcoholen nodig he.. ik heb het over ethanol en butanAL
Parent
▼
bloxie 15 Jun 2011, 18:27
je hebt altijd meer dan 1 alcohol nodig...
Parent
▼
spiROZE 16 Jun 2011, 09:58
zeg ik toch
Parent
▼
bloxie 16 Jun 2011, 12:41
ik heb het niet over scheikundige shit sherlock:P
Parent
▼
oLGaa 15 Jun 2011, 15:54
Sn2 are between a nucleophile and an electrophile. but if the electrophile is a carbonyl or carboxyl, then it is called "nucleophilic substitution reaction on carboxyl/carbonyl"
Parent
▼
oLGaa 15 Jun 2011, 15:52
alcohol and aldehydes with acid catalysis usually form structures like R-CH(OH)-OR but in since concentrated H2SO4 is also a dehydrating agent, it could form an ether, but I am still not fully convinced of my own idea :D
will check it by literature

e : checked now the literature.
if the ethanol is stoichiometric, a hemiacetal is formed.
if the ethanol is in excess, an acetal is formed.

so here I would say an acetal is formed.
Parent
▼
spiROZE 15 Jun 2011, 16:01
I'm guessing that my teacher made a mistake while typing out and that the butanal is supposed to be butanol cause that would make sense.. 2 alcohol's together in an acid solution form an ether
Parent
▼
spiROZE 15 Jun 2011, 16:01
hmm ok gonna read what you typed and try to understand :D

brb
Parent
▼
spiROZE 15 Jun 2011, 16:07
hmm I just checked my book again and I think I skipped the essential part :D but that's because the teacher told us not to learn that stuff. (my exam question is from a few years ago so that makes sense).

So after reading I think that this should be the answer:

Butanal ->(reduction) forms an alcohol

so then we just have ethanol + the formed alcohol wich will make an ether since we are working in an acid solution

I guess that's how it works?
Parent
▼
oLGaa 15 Jun 2011, 16:30
i agree that 2 alcohols form an ether under acid catalysis, but the trick here is the concentrated sulphuric acid, which is a hygroscopic and oxydizing acid. It keeps the water away from the reaction.
what I dont get is the "butanal -> (reduction)" part. If an aldehyde is treated with a nucleophile it becomes an alcohol (reduced version), BUT it is not reduced if the nucleophile is an O-nucleophile, because the oxidation number is depending on the substituents attached to the carbonyl-C. if a double bond to an oxygen atom is transformed to two single bonds to two oxygen atoms, the oxidation number doesnt change.

In your example, there is no reducing agent present and when the acetale is formed it should have the same oxydation number on the "carbonyl"-C than before.

e: I can post the mechanics of the reaction if you like :)
Parent
▼
Complex 15 Jun 2011, 14:38
nice life
▼
schNee 15 Jun 2011, 14:39
brink never heard of it
▼
t4Mj 15 Jun 2011, 14:41
14:37 here.
▼
sCope 15 Jun 2011, 14:41
12:37 sorry man
▼
zeddd 15 Jun 2011, 14:54
Posted by h20xyg3n on Wednesday 15th June 2011, 14:37

derp :|
▼
sn0oz 15 Jun 2011, 14:59
1337 oclock (12 comments)
Posted by h20xyg3n on Wednesday 15th June 2011, 12:37 GMT
▼
Spero 15 Jun 2011, 15:32
yeah he lives in GMT +1 THANK YOU FOR KNOWING TIME DIFFRENCES
Parent
▼
denuo 15 Jun 2011, 15:54
wtf means 1337?
▼
P5Y 15 Jun 2011, 16:00
i hope this is a troll :s
Parent
▼
Suyodhana 15 Jun 2011, 16:13
He's a cancer Polak, what you'd expect?
Parent
▼
denuo 15 Jun 2011, 16:45
eheh wannabe polak says that
Parent
▼
Suyodhana 15 Jun 2011, 19:11
I'm not a wannabe Polak, I just fuck yo bitches! :D!
Parent
▼
denuo 15 Jun 2011, 20:35
in wich city do u live?
Parent
▼
Suyodhana 15 Jun 2011, 20:41
It's called "I fuck Polish bitches", you won't know it.
Parent
▼
denuo 15 Jun 2011, 21:07
yeh i heard about your right hand
Parent
▼
denuo 15 Jun 2011, 16:46
really its hard to write?
Parent
▼
Indloon 15 Jun 2011, 16:08
wtf means 1337?
▼
xiN 15 Jun 2011, 17:06
Leet
Parent
▼
Indloon 15 Jun 2011, 19:12
Wtf means leet???????
Parent
▼
xiN 15 Jun 2011, 20:01
Nice troll buddy.
Parent
▼
Suyodhana 15 Jun 2011, 16:12
For fucks sake, get crapped on already!
▼
Nub 15 Jun 2011, 16:31
Posted by h20xyg3n on Wednesday 15th June 2011, 14:37
▼
Ethr 15 Jun 2011, 18:23
brink could have been so goodbut it wasnt
Back to top