EPT
For the first time in my life
| Blogs > Steelflight-Rx |
|
Steelflight-Rx
United States1389 Posts
| ||
|
Plutonium
United States2217 Posts
| ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Plutonium
United States2217 Posts
It's obviously some superpower - you got yourself on such a immense level of understanding of the organic chemistry that you subconsciously gained the ability to alter your own brain chemistry, and synthesized yourself a hallucinogen. That, or your body was trying to kill itself. I just got off a 2-day bender (midterm yesterday) where I had like six hours of sleep total, and I never want to see a Ketone or an Aldehyde mechanism ever again. (Except for Wittig reactions, that shit is cool.) | ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
MoNKeYSpanKeR
United States2869 Posts
+passdrugtestezpzlemonsqueezy | ||
|
Plutonium
United States2217 Posts
I did kick ass on my midterm though! Remember that small detail about methyl alpha carbons off of a ketone reacting with base and excess dihalogens? It totally came up, and I'm not even going to tell you what it does so you're going to go crazy unless you look it up. What school are you at? | ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Steelflight-Rx
United States1389 Posts
 | ||
|
Plutonium
United States2217 Posts
What happens is that the methyl carbon actually leaves, and you get a deprotinated carboxylic acid (RCOO-) and a a tri-halogenated methyl ion, something like Na+CBr3- if the dihalogen is Br2. Edit: What you're thinking of is just dihalogen in base. I'm talking excess dihalogen in base, and there is a difference. | ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Plutonium
United States2217 Posts
Edit: Well, now you know it. Malonic esters will come up definitely too! Know the mechanism? It's a tricky little fucker, and you should at least know the general reaction. | ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Plutonium
United States2217 Posts
| ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Plutonium
United States2217 Posts
Find the chem majors. Where are you going anyways? Right now I'm trying to remember what the synthesis problem I got was. All I remember was that it was really easy. | ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Plutonium
United States2217 Posts
All the Pre-med and Bio guys are just memorization hacks, they couldn't do a creative synthesis to save their lives. | ||
|
ShaLLoW[baY]
Canada12499 Posts
| ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Plutonium
United States2217 Posts
![[image loading]](http://i2.photobucket.com/albums/y32/gkclarkson/chemproblem.jpg) This was the synthesis problem on my midterm, and I loved it! So much easier that I expected, and you can do it it two steps with no other products. | ||
|
Steelflight-Rx
United States1389 Posts
I donno if i can get it in 2 steps, was thinking turning OH into carbonyl, then adding organolithium (or grignard), then doing some sort of elimination to get double bond. Maybe i should study some more =p (altho i think you have more material than me, that malonic ester shit isnt until next chapter for me) | ||
|
CapO
United States1615 Posts
 | ||
|
Plutonium
United States2217 Posts
+ Show Spoiler + ![[image loading]](http://i2.photobucket.com/albums/y32/gkclarkson/chemsolution.jpg) Use a Wittig Reactant. I can detail the mechanism if you don't understand it. Also, the PhP-blah is supposed to be PH3P-blah. | ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Plutonium
United States2217 Posts
*Cracks Whip* | ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Plutonium
United States2217 Posts
| ||
|
Plutonium
United States2217 Posts
![[image loading]](http://i2.photobucket.com/albums/y32/gkclarkson/chemproblem2.jpg) | ||
|
Plutonium
United States2217 Posts
+ Show Spoiler + ![[image loading]](http://i2.photobucket.com/albums/y32/gkclarkson/chemsolution2.jpg) | ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Plutonium
United States2217 Posts
| ||
LosingID8
CA10828 Posts
![[image loading]](http://img214.imageshack.us/img214/5776/ocheme3synthlb2.png) ![[image loading]](http://img140.imageshack.us/img140/1528/ocheme3synthgp0.png) | ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Plutonium
United States2217 Posts
![[image loading]](http://i2.photobucket.com/albums/y32/gkclarkson/chemproblem3.jpg) | ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Plutonium
United States2217 Posts
| ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Steelflight-Rx
United States1389 Posts
![[image loading]](http://img206.imageshack.us/img206/7551/ochemdy0.jpg) ![[image loading]](http://g.imageshack.us/g.php?h=206&i=ochemdy0.jpg) | ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
LosingID8
CA10828 Posts
i go to USC, btw. *edit* ah, i see. | ||
|
Plutonium
United States2217 Posts
+ Show Spoiler + I would oxidize two equivalences of ethanol with PCC and react them both with NH3, then use a radical reaction to add a lithium to one of the carbons, deprotinate the benzene with a strong base, and then finish it up with a SN2 to add the carbon chain. I'm not really sure how this one would work. | ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
LosingID8
CA10828 Posts
+ Show Spoiler + ![[image loading]](http://img405.imageshack.us/img405/268/ochem1answerzv5.png) + Show Spoiler + ![[image loading]](http://img301.imageshack.us/img301/5098/ochem2answeruw0.png) | ||
|
Plutonium
United States2217 Posts
Here's what I was looking for: + Show Spoiler + ![[image loading]](http://i2.photobucket.com/albums/y32/gkclarkson/chemsolution3.jpg) | ||
|
Plutonium
United States2217 Posts
In fact, a lot of that stuff I haven't seen before. | ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Plutonium
United States2217 Posts
Yeah, your way would work just fine, I was just looking for an example where you can react a cyanide with acid/base and heat to form a carboxylic acid. | ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
LosingID8
CA10828 Posts
we're using Solomons/Fryhle 9th Ed., and we're finishing up Ch 24 out of 25 possible in the book. 1st semester ochem we covered chapters 1-11 1: bonding and molecular structure 2: functional groups, intermolecular forces, IR spectroscopy 3: acid and base reactions and mechanisms 4: nomenclature and conformations of alkanes and cycloalkanes 5: stereochemistry 6: SN and E reactions 7+8: alkenes and alkynes - elimination and addition 9: H/C NMR and mass spectrometry 10: radical reactions 11: alcohols and ethers 2nd semester, chapters 12-23 12: redox, grignards 13: conjugated unsaturated systems 14: aromatics 15: reactions of aromatics 16+17: aldehydes and ketones - nucleophilic addn to carbonyl groups, enols and enolates 18: carboxylic acids and derivatives 19: synthesis and reactions of B-dicarbonyl compounds 20: amines 21: phenols and aryl halides 22: carbohydrates 23: lipids 24: amino acids and proteins ch25, which we won't cover deals with nucleic acids and protein synthesis the material in 2nd semester was SOOO much more dense than 1st semester though, lol. god i feel like i'm going to die on the final this time. | ||
|
L
Canada4732 Posts
Edit: Solomons/Fryhle 9th Ed. Oh vomit. Really bad practice problems in ol' solomon. I'd learn theory there and switch to another text for problems if you're really keen on chem. | ||
|
Ilikestarcraft
Korea (South)17727 Posts
Wow its from deathnote right? | ||
alffla
Hong Kong20321 Posts
HELPPPP i'm so glad i dont have to ever touch that shit again | ||
|
Xiberia
Sweden634 Posts
| ||
|
LastWish
2013 Posts
| ||
|
Equinox_kr
United States7395 Posts
On May 01 2008 13:59 ShaLLoW[baY] wrote: In my Chemistry class, we've deduced that bases have a pH > 7 and that acid rain is acidic. Woo~ OH MY GOD HAHAHAHAHAH | ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
GrayArea
United States872 Posts
Ok so, I didnt read pages 3 and 4 because I was too excited to post, but ya, I know everything you guys were talking about and am having exams on it right now. This is too cool. I learned the diethyl malonate and ethyl acetoacetate synthesis, so I could do those problems. Um, if you want I can post some synthesis problems also, they are so fun. Anyway, we should keep this thread going all the way through finals, so when we are studying and if we have questions, we can ask each other. | ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
Steelflight-Rx
United States1389 Posts
On May 01 2008 13:43 Plutonium wrote: It will totally come up - It did on mine, and because I know I got it right it will ruin the curve for others! I lol'd when it came up in the first question on the exam | ||
|
Steelflight-Rx
United States1389 Posts
+ Show Spoiler + ![[image loading]](http://img241.imageshack.us/img241/6733/ochemtv4.jpg) ![[image loading]](http://g.imageshack.us/g.php?h=241&i=ochemtv4.jpg) Explain why this does not further oxidize to benzoic acid. (Also write mechanism, but i got that part). | ||
|
Hittegods
Stockholm4641 Posts
| ||
|
gravity
Australia1861 Posts
On May 02 2008 09:47 Hittegods wrote: I'm so glad I'm never going to take chemistry again. Me too, I only took it in first year but even then, Organic was horrible . If this thread is anything to go by it looks like it only gets worse later on. | ||
|
Steelflight-Rx
United States1389 Posts
| ||
|
GrayArea
United States872 Posts
On May 02 2008 07:48 Steelflight-Rx wrote: The one question that stumped me: + Show Spoiler + Explain why this does not further oxidize to benzoic acid. (Also write mechanism, but i got that part). I think you have to look at the solvent. Had the solvent been protic, like H2SO4, you would have the proton donor to make the carboxylic acid. Because the solvent is pyradine however, you don't have the proton donor so it stops at just the carbonyl. This my thinking at least, what do you think? | ||
|
GrayArea
United States872 Posts
| ||
| ||
