Ochem - ACE organic

Anyone in ochem or has taken ochem ever had ACE organic homeworks?

I loved how we had unlimited tries for most of the homeworks. Until we started to spectroscopy. Prof decided to flip a bitch on us and give 20 tries per problem.

I wish they'd get their time zones straight. Due dates have been really confusing because of that...

I've never had organic chemistry. All I can tell you is what I've heard about lab time and equipement use in any field of scientific research: It's limited. Any laboratory you'll work in will time limits imposed on its use. Your boss may give you 5 weeks or 5 years to work on a problem, but you may only have a few hours or so of access time to the lab or specialized equipement per day, or per week or so. Consider your teacher's condition of the 20-try limit preparation for real-world corporate-style lab work: Limited time with limited access to materials and equipement.

OP here. OH SHIT... I'll take that into consideration since I've been gearing towards the bio-med industry. The time you do get to spend in lab is really precious.

The thing was with spec is that we started it right after the first midterm and we didn't have a lot of practice. (spec is cake now. :D  ) I heard that IR, C and H NMR was actually taught near the end of the course.




We're going into Stereochemistry now. Is there any easier way to determine the absolution configuration of a chiral center(S or R)? What has worked for you?
I'm really just thinking about making a generic tetrahedral carbon model and spin the damn thing clockwise or counter clockwise..

What are ACE homeworks? Is that something like lon-capa?

Assuming you have a generic tetrahedral carbon model with 4 different coloured balls, you are fine.

1.  Assign precedences to 4 different groups.
2.  Assign each group to a ball.
3.  Look down the bond between carbon and lowest precedence group.
4.  If 1-2-3 goes clockwise then R.
    else if 1-2-3 goes counter clockwise, then S.

Agree with OP, there is not enough lab time; it is very precious.

Oh ok. I guess I was on the right track with a generic carbon model..

ACE is like our online homework. We usually get 10-12 problems where we (usually) have to draw out the molecule like in MDL ISIS/draw (but i think its actually in java). Sometimes we get Multiple choice questions. For example, a question would be: "Draw the structure of (E) but-2-ene."


I've got the lab today actually. Synthesis of acetaminophen. Ugnh.... I don't understand how scratching the conical vial or whatever with a glass rod induces crystallization but it does. =\

I have horrible memories of Organic I with that ACE horse shit.  Such a waste of time.  The thing I couldn't get, but get now taking org. II were all the mechanisms.  Our exam had the one for Wolf-Kichner reduction which was ridiculous.  For stereochem. I suggest just taking S R and using those instead of Fischer projections.

OP again, I totally bombed the mechanism in the last exam. We had to fill in the rest of the flow chart, it was a generic alkene reacting with hydronium.

We just got into Fischer projections. Funny that you mention that,  lol.

Apparently this lab is a two part lab. We're gonna do TLC next week or some shit. What are ochem II labs like? Is it more of the same shit, crystallizing something and finding its MP and then recrystallizing something and finding its MP again?? I heard though that the reports are MUCH MORE demanding. Like how a notebook is kept and what not.

>I don't understand how scratching the conical vial or whatever with a glass rod induces crystallization but it does. =\

Scratching the side agitates the solution and give the crystals somewhere to form. same reason you aren't supposed to stir caramel as you cook it, crystals

HA I hope none of you take an Advanced Organic course.  You have to use Pchem, Orbitals, and rules discovered by our good friends Woodward and Hoffman (not Corey) to show the logical progression of a mechanism.  Once you get it it's a million times easier to do everything else in Ochem, but until then.... Well Good luck.

In my O-Chem II it's mostly just a bunch of syntheses via whatever happens to be the most important mechanism in the chapter we're covering. Notebook isn't bad, just have to write a couple paragraphs about eachlab 4 intro, write out balanced eqns, physical constants, figures, everything you actually do during the lab, then conclusion/calcs.

Er, Organic Chemistry is the easiest chemistry.  What are you all whining about?

Go take some physical chemistry/analytical chemistry, realize how much math you don't do in orgo, and then proceed to slap yourselves in the forehead.

>>11
every course i've done with math in it was easy mode/

Organic chem is my easiest class. Srsly all I do is study the night before the tests. In last semester and all of this semester I have never missed a single point on a synthesis problem. and have received several 100%'s on written section.

>>13
Congratulations, you go to a shitty school.

>>>13
>Congratulations, you are a Jew.

Fix'd

The word pirahna, is all I can think of that rhymes with marijuana

Marijuana MUST be legalized.