/sci/ - Science & Math

>>4813888
So what you're saying is that you failed freshmen chemistry.

The crux of this question is heat flow. At the very least you have to consider convection in the fluid, surface area through which heat can exchange, insulating properties of the glass (particularly the different thickness at the bottom), air flow around the glass, and room temperature.
tl,dr. I don't know.

>>4806868
Surface Chemistry =!= Inorganic Chemistry

Too many idiots getting to to grad school these days I guess.

>thinking communes work
>believing in post scarcity utopia
>2012
ISHYGDDS

>>4806358
As I said, I'm not familiar with inorganic chemistry.

Oxygen is highly reactive. This is why almost every material ends up with an oxide coating at it's surface. Activation energy for lots of oxidation reactions is high because bond forming is a spin forbidden process. In the case of CH bonds you have to break the spin paring of the electrons that form the sigma bond. If you don't think oxygen is reactive then you need to revisit your high school chemistry notes.

>>4806170
I don't think the eg and t2g orbitals are valence. I suppose there is some shielding from the outer orbitals. Ligand effects are probably important stabilizing factors as well.

I'm not an inorganic chemist so I can't speak with authority on the bonding in transition metals. I can say that the same diradical nature of molecular oxygen is what causes it to be unstable.

>>4805403
Delocalization of 4N electrons in a ring is unfavorable because it creates a pair of partially filled molecular orbitals that essentially create a diradical. This is unstable (thermodynamics, reactivity, etc.). The easiest way to visualize this is to construct frost circles for a few different molecules.

http://totallysynthetic.com/blog/
http://newreactions.wordpress.com/
http://www.coronene.com/blog/

>>4805307
antiaromatic system don't delocalize

>>4804912
You don't need a catalyst and you should be wearing gloves.

I'm out. Time to hit the bars.

>>4804886
Only when doing chem demos. It isn't a useful catalyst in any of the work I do.

>>4804875
>>4804869
I'm impressed. You've assembled a collection of jury rigged materials and hazardous chemicals and combined them with just enough knowledge to be dangerous to yourself and others. Nice hazard labels on that stuff by the way.

>>4804831
Post pics of your lab. I haven't had a good lol today.

>>4804789
I'm agreeing with blackman.
Does this make me a bad person?

>>4804761
What are your qualifications?

>>4804218
Normally when I'm giving explanations like that to students it's because the full, technical explanation will only garner blank stares and befuddled silence. It's easier for the teacher and the student to leave it at 'because I say so.'

http://www.youtube.com/watch?v=UTgIxhfhRcg&feature=relmfu

Skip to about 7 minutes in.

>>4804088
Because a pi bond isn't stronger than a sigma bond. Double bonds are stronger than single bonds, but that is because they are a combination of both a pi and sigma bond.

http://pipeline.corante.com/
http://totallysynthetic.com/blog/
http://blog.chembark.com/
http://newreactions.wordpress.com/
http://wattsupwiththat.com/
http://chemjobber.blogspot.com/

See if you can guess my profession.

>>4794221
You'll be assigned to a graduate student who will be training you. Just don't break anything and clean up your messes and you'll be ahead of the curve. I'd suggest you read the last couple papers on the topic that the PI published and understand everything in them. If you can do all that then you'll be golden.

>>4794208
I work next to a group that does organic semiconductors and dyes. Lots of synthesis, materials characterization (mostly UV/Vis and fluorometry), and physical organic to be had in that area. Plus they have easy columns to run because they can see all their spots as they flow. Most of their compounds crystallize too so columns aren't always necessary.

>>4794132
X-ray facilities are nice for some types of research, but if you don't work on materials that crystallize then they are useless. Still, they are the sign of a quality department.

High resolution Mass-Spec is elemental analysis.

When evaluating NMR facilities it is important to check the brands. Both Bruker and Varian make good stuff, but you will want to learn to use one or the other, not both. So make sure there will be enough of one brand to satisfy your needs. An active organic division of about 50 students should keep about 2 instruments booked full time and a third at about half.

I'd also recommend a good quality materials analysis lab if you are at all interested in macro/polymer/materials chemistry. TGA, DSC, DMA, SE-HPLC. SEM and TEM facilities are also nice.

You should work for E. J. Corey. I hear that he is really nice to his students and they enjoy their work.

>>4794099
DGR?

http://dgr.rints.com/

>>4794041
What do you want to do? Total synthesis? Methodology? Materials? Catalysis?

Organic is a big field. You'll need to be more specific for us to give any real advice.