The Periodic Table

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1:04 AM

Anyone who feels that my answer is incorrectly approximated (remember, i am forgoing sig figs) feel free to give your opinion as to what you think the correct approximate answer is. It's not like i am tying anyone's hands here. — chemrxn101 5 mins ago

what a troll lol

1,3-feeds

Q: Use of a diagram in a publication

I am a PhD student and I'm conducting research into the measurement of citrate in human biofluids using the indirect citric lyase method. The final step involves the differential absorbance of NADH/NAD+ at 340nm. I've found a very useful diagram on your website and would respectfully request perm...

discussion

5 hours later…

MartianCactus

5:51 AM

what do you call an acid with an attitude?

A mean-o Acid

;)

5 hours later…

Bounty Hunter

10:34 AM

Q: Why do aromatic compounds have an upfield shift upon coordination to metals?

Why do aromatic compounds have an upfield shift upon coordination to metals e.g. ferrocene? The 1H NMR shows a single environment at ~4.1 ppm. This is in contrast to the usual aromatic shift of between 6-9 ppm. At the moment, I have the following rationale, although I am not convinced about 2/3: ...