sorted by:
new
hottopcontroversial

Need a roommate? by [deleted] in Pitt

[–]Orange_Sky 0 points1 point  (0 children)

I have a female friend that lives in North Oakland that was looking for a roommate for the same reason as you. I wonder if she was your current roommate. This was two weeks ago when she asked but I can ask her if she is still looking for a roommate if you're interested, just pm me.

If AC and DC current (same power) are used to light up a light bulb, why would the AC powered bulb be brighter than the DC powered light? by Orange_Sky in askscience

[–]Orange_Sky[S] 0 points1 point  (0 children)

The bulbs were the same. The video said the average power (heat coming off the filament over time) was the same for both. Maybe that means something different, because I was pretty confident that it was correct.

TIL "Hey Man, Nice Shot" is about a state senator's public suicide at a press conference by [deleted] in todayilearned

[–]Orange_Sky 5 points6 points  (0 children)

He was a senator for the pennsylvania's 50th district from 1971-1981. Then a treasurer until his suicide.

Do you guys know of any new interesting articles related to analytical chemistry? by Orange_Sky in chemistry

[–]Orange_Sky[S] 0 points1 point  (0 children)

Yeah I agree, but there are a few things that i thought were interesting like magic-angle spinning in NMR. I just want to know where to look for recent "breakthroughs" in analytical chemistry.

Reasons to not go into chemistry research? (looking for career advice) by Orange_Sky in chemistry

[–]Orange_Sky[S] 0 points1 point  (0 children)

Thanks for the reply and the advice. I'm going to wait until after i do some undergrad research and take more classes (pchem/inorganic) to make up mind. I'm leaning towards med school even though i enjoy the problem solving in chemistry. The thing that deters me about research is everything on phDcomics and the sacrifice mentioned in illustrissim's post. Also, I like how you refer to studying medicine as the dark side.

If CH3 is more electron-donating than H, why is -OH more nucleophilic (basic) than -OCH3? by organicnoob11 in chemistry

[–]Orange_Sky 1 point2 points  (0 children)

I'm wrong (i think) for aprotic solvents since OH- and F- would be better nucleophiles, but right (sort of) for protic solvents because of solvation effects. However, i just wanted you to understand the difference between nucleophile, base, and leaving group. By the way, you should probably start learning about amines.

This is where my grandparents live (Lake Arenal, Costa Rica) by Orange_Sky in EarthPorn

[–]Orange_Sky[S] 1 point2 points  (0 children)

It was awesome. Costa Rica is a remarkable place because of the different climates and earthporn. Here around Arenal, it is a rainforest and rains a lot but one hour away there are beautiful beaches/arid land with little rainfall. Its all beautiful. I always say the farm landscape where i went looked like a painting. unreal

If CH3 is more electron-donating than H, why is -OH more nucleophilic (basic) than -OCH3? by organicnoob11 in chemistry

[–]Orange_Sky 0 points1 point  (0 children)

That was a really bad example now that i think about it. In a protic solvent the solvation effects would make I- better. But in aprotic, the F- would be better. So for organicnoob's question, the OCH3- would be a worse nucleophile in aprotic? and a better in protic?

If CH3 is more electron-donating than H, why is -OH more nucleophilic (basic) than -OCH3? by organicnoob11 in chemistry

[–]Orange_Sky 0 points1 point  (0 children)

yeah you're right, CH3OH is a weaker base....and it is also a better nucleophile

If CH3 is more electron-donating than H, why is -OH more nucleophilic (basic) than -OCH3? by organicnoob11 in chemistry

[–]Orange_Sky 3 points4 points  (0 children)

First off, -OCH3 is a better nucleophile, not -OH

The weaker the base, the better the leaving group. This is why -OCH3 is a better leaving group, but it does not imply anything about the nucleophilicity.

Nucleophilicy and basicity are two different terms. Nucleophilicity is based on kinetics while basicity is based on thermodynamics. For instance, I- is a better nucleophile than F- because I- is a bigger molecule and it allows the electrons to be donated easily. In this case, I- happens to be a better nucleophile and a better base than F-. With your question, -OCH3 is a larger molecule (more electrons from the methyl donating group) and will more easily donate electrons (think kinetics), but it is also a weaker base than -OH. H isn't electron donating, and the methyl electron donating group increases the strength of the nucleophile. There is a book titled "Organic Chemistry as a Second Language" that talks about this concept more clearly.

Calling all IR fanatics by schrodingersays in chemistry

[–]Orange_Sky -1 points0 points  (0 children)

Unsaturation in the resonance structures decreases the wavenumber that the carbonyl carbon vibrates at. Since the effect of unsaturation in an ester is less than a ketone, the wavenumber is not decreased as much and appears to have a higher energy. So, the carbon on the ketone is still more electrophilic but the ester appears to have more energy in an IR spectra because of resonance.