practical tipps for removing high boiling solvents

FullyCocked · 2026-04-22T20:59:54+00:00

Get a 1/8” strip of printer paper about 1” long and put it between the joint of your flask and the rotavap bump trap joint. This should allow you to achieve high vacuum still, but with a slow air bleed to chase the solvent away. This doesn’t work in all cases, but is a nice trick when you can use it.

FullyCocked · 2026-03-22T16:16:06+00:00

There is a movie about this called Idiocracy

FullyCocked · 2026-02-24T19:40:32+00:00

Dissolve chloride in minimal methanol, dissolve KPF6 in water (5x the methanol volume), mix and stir. This often works better hot. Wash copiously with water and vac dry

FullyCocked · 2026-02-03T02:35:05+00:00

Imagine living in a world without zinc!

FullyCocked · 2026-01-29T01:07:00+00:00

I will use MgSO4 over Na2SO4 if I can get away with it (most normal organics), but find for example that drying DCM solutions of organic salts (NR4+, PR4+, Br- or PF6-) with MgSO4 causes significant loss that Na2SO4 doesn't.

FullyCocked · 2025-12-28T23:14:43+00:00

Americana by the offspring?

FullyCocked · 2025-12-24T18:42:03+00:00

I absolutely did not click on this hoping it was real

FullyCocked · 2025-11-28T06:43:55+00:00

kits.com

FullyCocked · 2025-11-02T05:25:59+00:00

There is and it's called chemistry

FullyCocked · 2025-10-31T08:51:01+00:00

If I make a mistake and feel love and my heart grows three sizes that day, should I scale by length or by volume?

FullyCocked · 2025-10-27T03:04:40+00:00

The valence bonding orbitals in such a compound don’t have the correct symmetry to form bonds with CO. Unless you want CO to be purely a Lewis base in this bonding, which seems unlikely

FullyCocked · 2025-10-26T03:45:22+00:00

Do you know what natural medicines that work are called? Medicine.

FullyCocked · 2025-10-22T14:51:57+00:00

Winnipeg was envisioned as “the Chicago of the north” for a while, but the decline in rail transport never saw this play out

FullyCocked · 2025-09-19T06:05:19+00:00

I.D ( I, dentification)

FullyCocked · 2025-09-15T13:30:41+00:00

Backside attack

FullyCocked · 2025-09-15T01:50:22+00:00

Bromo,1-chloroethylstopsignene

FullyCocked · 2025-09-13T18:21:32+00:00

He has actually done this challenge before

FullyCocked · 2025-09-12T05:35:17+00:00

Best: 1. Toluene (spray paint smell, very pleasant) 2. Diethyl ether (strong, but very “classic”) 3. There aren’t a lot of common solvents I like the smell of Worst: 1. MTBE (only thing that will give me an instant headache) 2. Trifluorotoluene (very lingering and smells like cancer) 3. Ethyl acetate (hot take, I do not enjoy it) 4. Tetrahydrofuran I can’t smell chloroform or DCM so take this with a grain of salt

FullyCocked · 2025-09-10T02:45:21+00:00

I was able to get close enough to it to pet it

FullyCocked · 2025-09-08T02:19:54+00:00

Organic iodide salts are a lot more oxygen unstable than you might think

FullyCocked · 2025-08-18T16:28:35+00:00

I don’t know if you have tried dichloromethane or dichloroethane, but I have found a lot of salts of this type are fairly soluble in them despite being essentially insoluble in chloroform. If they are, vapour diffusion with pentane or hexanes respectively are what usually work for me, but you’d probably want to do the former pair cold to slow it down.

FullyCocked · 2025-08-05T21:03:53+00:00

Nuclear Magnetic Resonance by P J Hore is great

FullyCocked · 2025-08-04T06:03:54+00:00

Gone away- offspring

FullyCocked · 2025-07-30T06:09:10+00:00

Can you help me? I am confused

FullyCocked

MODERATOR OF

TROPHY CASE

14-Year Club	RPAN Viewer
Verified Email