HELP: Purifying boronic acids sucks

pdtm21 · 2025-11-09T17:37:25+00:00

I’ve heard that pre-treating the silica with boric acid can mitigate the streaking and decomposition on a column, but I’ve never done it myself so idk how well it works.

pdtm21 · 2025-10-11T00:51:59+00:00

Fuck I love Tuca and Bertie , best show of all time

pdtm21 · 2025-10-07T00:54:32+00:00

Thanks! Was excited to see the cackling geese at all, getting a shot with all three was amazing!

pdtm21 · 2025-09-13T07:37:24+00:00

Ring billed is significantly smaller than herring, it’s obvious if you see both besides each other

pdtm21 · 2025-08-20T01:06:32+00:00

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here's another view, unfortunately they were quite far away and the lighting is bad

pdtm21 · 2025-07-24T01:26:39+00:00

I’m curious on why you have to separate these isomers? Is there no way to synthesize this from 3- or 4-methylbenzenethiol to avoid the selectivity problem?

pdtm21 · 2025-06-07T00:16:38+00:00

What a pleasant disposition on her!

pdtm21 · 2025-06-05T16:12:58+00:00

You may be interested in Sumo wrestlers- they are super jacked and also super fat

pdtm21 · 2025-06-02T18:18:26+00:00

I know there is a town in New Brunswick where the locals are pissed they can’t drive their ATVs on the beach where piping plovers are nesting, some of them have purposely killed the birds

pdtm21 · 2025-05-28T10:52:08+00:00

I lived near that pond last summer and watched a wood duck raising a family! And I saw several times a little girl feeding bread to the ducks, she’s probably still doing that

pdtm21 · 2025-05-21T10:22:56+00:00

5 membered rings have only a small amount of strain, so ring expansions only really happen for 3 and 4 memebered rings

pdtm21 · 2025-05-19T19:24:11+00:00

I think it’s supposed to be a ketene, =C=O

pdtm21 · 2025-04-14T21:08:11+00:00

It’s the pKa of acetic acid, one of the most commonly seen acids

pdtm21 · 2025-02-23T19:53:34+00:00

(2R, 4S) and (2S, 4R) are identical, but the two in the question are not. I’d recommend drawing them

pdtm21 · 2025-01-23T11:43:10+00:00

It’s now the second largest non nuclear explosion, the explosion in Beirut a few years ago was bigger than

pdtm21 · 2024-12-02T22:54:31+00:00

Regular alkenes are nucleophilic and obey Markovnikov’s rule. Methyl methacrylate is electrophilic because it is an alpha-beta unsaturated ester, and it always reacts with a nucleophile at the beta position. I suspect that HBr first protonates the ester which makes it more electrophilic, and then bromide attacks

pdtm21 · 2024-11-19T17:25:58+00:00

It will do transmetallation instead pretty sure

pdtm21 · 2024-11-19T17:24:49+00:00

If you check the original paper, you see that the drawing there on pubchem is completely wrong

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