[cpchem]

Presumably the hydroxyl goes axial, and methyl equatorial - smaller vdW radius for OH minimises 1,3-diaxial interactions.

[EierVonSatan]

(Original post by Turdburger)
http://www.fsj.ualberta.ca/CHIMIE/gif/Image390.gif

Found that, which i presume is basically the answer. Sorry to be thick, but is diequatorial the cis isomer?

My thinking was orginally diaxial wont exist as it will ring flip to form the diequatorial -- diequatorial being far away from each other so trans. Wheras 1 equatorial 1 axial is closer so cis. Confused.

If it's trans they can't both be axial or both equatorial- so you're going to have to pick which is more stable; the hydroxy equatorial or the methyl. See A-values

[Turdburger]

Cheers guys thanks a lot. Would rep if i havent already repped you both too recently. I get myself in such a muddle with ring chemistry its going to be best to learn to learn the stuff off by heart rather than by principal.

Past paper 71/100 with 4/20 in rings suggests I need to work on it a bit

[cpchem]

Tomorrow's lecture will be awesome. DEL, chugging through last year's paper at a furious pace. I can hardly wait

[Brianstorm91]

I guess I ought to show my face here, all things going to plan I'll hopefully be starting at Bristol this autumn. Now just to get these exams over and done with...

[EierVonSatan]

(Original post by Brianstorm91)
I guess I ought to show my face here, all things going to plan I'll hopefully be starting at Bristol this autumn. Now just to get these exams over and done with...

Welcome

Exams are annoying arn't they? Best of luck with them though

Bristols a lovely place, I know a couple of people went there to do their PhDs too.

[Brianstorm91]

(Original post by EierVonSatan)
Welcome

Exams are annoying arn't they? Best of luck with them though

Bristols a lovely place, I know a couple of people went there to do their PhDs too.

Thanks, I don't mind the exam as such, just the extended answer bits (10-odd marks!) they always seem to be on the more annoying parts to write about like colour and glc.

I love the synthesis questions, though

[Zedd]

I've just made a late application for chemistry...considering we barely cover the higher chemistry coursework (we only do two units out of the three and don't take end of year exams) I am slightly nervous but enthusiastic

[EierVonSatan]

(Original post by Zedd)
I've just made a late application for chemistry...considering we barely cover the higher chemistry coursework (we only do two units out of the three and don't take end of year exams) I am slightly nervous but enthusiastic

Excellent, another chemistry victim applicant

Don't worry about the coursework aspect it's pretty irrelevant to what you'll be doing at university

[Zedd]

Yep, reporting for service

By irrelevant I'm guessing you mean it doesn't even scratch the surface of actual chem, right?

[EierVonSatan]

Sort of, it's just that the types of experiments done are old fashioned and the theory to interpret them too simple

[raceforthefishman]

urg
Le 'french bloke's' principle + kinetics + me + practical assessmnt =

[MGIL]

equilibria has to be the easiest thing

[raceforthefishman]

(Original post by MGIL)
equilibria has to be the easiest thing

oh its not hard----its just---effort!
*i hate revision*

im confuzzzzzled about how im going to calculate anything from my titration either bc it has nothing to do with our little brief thing but nver mind!

[Zedd]

(Original post by raceforthefishman)
urg
Le 'french bloke's' principle + kinetics + me + practical assessmnt =

The only way I can remember his name is by thinking "The Sh*t Italy", works quite nicely for me.

[EierVonSatan]

(Original post by Zedd)
The only way I can remember his name is by thinking "The Sh*t Italy", works quite nicely for me.

that's one way I guess

[Kinkerz]

Question for homework says identify the main organic compound formed when the mixture is refluxed.

What exactly does reflux mean? I've never known, and you see it quite alot...

[EierVonSatan]

(Original post by Kinkerz)
Question for homework says identify the main organic compound formed when the mixture is refluxed.

What exactly does reflux mean? I've never known, and you see it quite alot...

Reflux is where you heat a mixture so that it boils, but instead of letting the solvent (or other volatiles) boil off you put a condenser on top to recycle the mixture so that you don't lose anything.

We say something is refluxing when its boiling and dropping back down once condensed

[Kinkerz]

(Original post by EierVonSatan)
Reflux is where you heat a mixture so that it boils, but instead of letting the solvent (or other volatiles) boil off you put a condenser on top to recycle the mixture so that you don't lose anything.

We say something is refluxing when its boiling and dropping back down once condensed

Ah. Makes sense...

Danke.

[Sardine]

hi chemistry buds. I cant get to grips with the buchner funnel, I've been researching it but still to no luck. Like we used it in class for the manufacture of aspirin, but i didnt have a clue what was going on. What is the point of the water from the tap, and what is the aim of using it? Please help!