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GBL synth

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- Fri, 09 Mar 2018 12:47:56 EST UXNYhWzG No.79011
File: 1520617676505.jpg -(18221B / 17.79KB, 474x192) Thumbnail displayed, click image for full size. GBL synth
Everytime. Every fucking time I try and synthesize GBL using the Sandmeyer reaction, the temperature skyrockets up to 40c and a bunch of foam forms atop the post reaction mix. I've used many different brands of HCl, GABA, and Sodium Nitrite. I've even begun to use a mini freezer to perform the reaction. And yet everytime the temperature goes up to 40 - 50 degrees Celsius. What in the hell am I doing wrong? I am following all of the instructions, but it's impossible to keep the reaction below 2 degrees C, and to stop the foam from developing, even with a goddamn mini freezer. The rate at which I add the HCl does not seem to matter. The amount of stirring doesn't seem to make a difference either. Could anybody help a complete amateur out?
2 posts omitted. Click View Thread to read.
press !//CEObOMBY - Thu, 15 Mar 2018 03:28:47 EST OJvL+al/ No.79017 Reply
what scale are you running it on?
got any notes?
Q !57aon8jsJ2 - Fri, 27 Apr 2018 00:13:55 EST 7gSriUk/ No.79093 Reply
heres an idea. instead of using that reaction why not do an easier synth? i just found a gbl synth thats one step and two ingredients.

Go buy some THF (tetrahydrofuran) a pretty common solvent. then use a strong oxidizer like what i read says to use aqueous sodium bromate but idk if theres anything actual special about that oxidizer or if pretty much any equally strong oxidizer would work. the THF then forms GBL in a one step one pot reaction.
Katsuragi !/pe1aKvMmQ - Thu, 24 May 2018 22:09:22 EST 4Q6JexVr No.79131 Reply
I prefer ethyl-alcohol, 40 proof.
Oh no, you're infrastructure is collapse.
I mean seriously, this is ridiculous.

CBN degradation synthesis from THC distillate

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- Sat, 16 Dec 2017 01:41:53 EST xJMHFoUR No.78945
File: 1513406513820.png -(212108B / 207.14KB, 2251x1508) Thumbnail displayed, click image for full size. CBN degradation synthesis from THC distillate
How would one go about a conversion synthesis of Cannabinol (CBN) from 98% pure delta9-THC distillate? Is there an economic method to do such a thing without an expensive lab or advanced chemical skills?
2 posts omitted. Click View Thread to read.
Aureolus Werrywag - Sun, 17 Dec 2017 18:49:33 EST 9mdhBiEz No.78952 Reply
damn work IP changes.
Katsuragi !/pe1aKvMmQ - Thu, 24 May 2018 22:11:57 EST 4Q6JexVr No.79133 Reply
cannabinoid chemistry is frustrating to think about for me, personally

Is ethanol really that easy?

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- Mon, 22 Jan 2018 20:30:04 EST cTRcFZHN No.78981
File: 1516671004570.png -(68997B / 67.38KB, 1188x464) Thumbnail displayed, click image for full size. Is ethanol really that easy?
I haz a question, /chem/: can I use regular rubbing alcohol for this extraction? I am a brainlet but I would really like to try this without pucking my guts out.

Also do you prefer acids or bases?
Angus Drollerchut - Mon, 22 Jan 2018 23:56:39 EST vEkGw4n0 No.78982 Reply
isopropanol is quite a bit more polar than diethyl ether. I don't think it would work. You could buy xylenes from a hardware store though.
!scyTheNg3k - Tue, 23 Jan 2018 20:05:11 EST hBAZGxou No.78986 Reply
idk who tf wrote that but it's bad sorry to say. here's a real tested tek:

>(all steps to be done under a red photographic light)

>1.) 8 kg of HBWR seeds are ground to a fine powder with the assistance of dry ice or liquid nitrogen.

[note: cold makes the seeds brittle, good for grinding]

>2.) to the seeds is added a chilled (30*F) acidic methanol (80% MeOH/DH2O) solution of tartaric acid (saturated). the ammount needed is just enough to cover
the powder with 1cm of fluid and is allowed to stand cold for 24 hours in the dark. more acidic methanol may be added as the seed powder absorbes it.

>3.) after 24 hours the methanol is removed by vaccume to compleate dryness. the seeds are then made into a slurry with DMF/DCM and loaded into a large column,
the DMF/DCM is allowed to drain through and more is added until test drops evapurate with no residue. save the DMF/DCM filtate.

tartaric acid and lots of other undesirable crap dissolves in DMF/DCM, but salts, including LSA tartrate, do not. we convert the LSA to a salt and then remove excess tartaric acid and most other soluble components of the seed.

>4.) the residual DMF/DCM is then removed by vaccume and the seed powder loaded back into the column and filled with chilled MeOH and allowed to stand for 2hr before
draining. this is repeated 4 times and the methanol extracts combined, filtered and reduced under vaccume to a small volume. cold ether is added to the methanol solution
untill cloudiness does not dispell and is placed in a very cold fridge for the crystals to set overnight. save this solution. this should afford 6-10g mixed LAA's as the tartarate salt.

ok the seed powder is wet with DMF/DCM, so we want to get rid of that before extracting with methanol; when that's done, we extract the powder four times with cold methanol, combine extracts, reduce "to a small volume" and add diethyl ether to precipitate LSA crystals.

tbh i'm not sure what happens to the DMF/DCM filtrate, i can only assume he just wants to recover his solvents. DMF/DCM is probably a 1:1 mixture. note recovery is 0.1% of seed weight so if you only have 10g of seeds you're gonna get back about 10mg of LSA which is a few (active) doses but also a very very small amount of chemical, practically impossible to work with if we're being honest
Katsuragi !/pe1aKvMmQ - Thu, 24 May 2018 22:14:30 EST 4Q6JexVr No.79134 Reply
Tastes like envelope sticky stuff.

Newtons law

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- Wed, 13 Dec 2017 13:10:12 EST vpcNyXDE No.78940
File: 1513188612059.jpg -(23150B / 22.61KB, 633x619) Thumbnail displayed, click image for full size. Newtons law
I'm lost on this physics question please help
Caroline Druttingham - Tue, 23 Jan 2018 03:09:42 EST bd1Er6gm No.78984 Reply
2 forces, force of gravity Fg down and air resistance Fair up combine to form Fnet. Newton's 3 Laws says Fnet = mass * acceleration which is given as a=2m/s^2. So Fnet = 1.0kg * 2.0m/s^2 = 2.0 N. Force of gravity is Fg = mass * g where g is 9.8m/s^2 so Fg = 1.0kg * 9.8m/s^2 = 9.8N. Fg - Fair = Fnet so Fair = Fg - Fnet = 9.8N - 2.0N = 7.8N.
Katsuragi !/pe1aKvMmQ - Thu, 24 May 2018 22:24:44 EST 4Q6JexVr No.79135 Reply
Tell your instructor that you had to go to a chemistry message board in order to even understand his question on Newtonian Mechanics. I think that's unfairly difficult.

Dutchsinse mentioned the chan websites so I'm gonna post

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- Mon, 15 Jan 2018 21:14:28 EST LvZjcpdi No.78972
File: 1516068868667.jpg -(181810B / 177.55KB, 1200x986) Thumbnail displayed, click image for full size. Dutchsinse mentioned the chan websites so I'm gonna post
I've been watching a cool youtube channel about plate tectonics affecting earthquake and volcanoes. Largely from seeing how they can effect the weather and cause massive climactic changes that significantly effected peoples in the far ancient past....anyway he mentioned telling people on 4chan about it. I don't go to 4chan anymore because its all porn and you can't have a meaningful conversation, whereas 420chan you can and people here tend to be woke a f as well as baked a f. I am currently ripped and decided to post it here along with an obscure Byzantine meme.
Katsuragi !/pe1aKvMmQ - Thu, 24 May 2018 22:26:38 EST 4Q6JexVr No.79136 Reply
All of your chans are ridiculous. Not even funny, bad simulation. I don't like it.


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- Fri, 17 Nov 2017 21:12:19 EST +YUSEic8 No.78910
File: 1510971139080.jpg -(153912B / 150.30KB, 800x640) Thumbnail displayed, click image for full size. Alternatives...
I've been on 420chan for a long time, and so i ask this with respect. Is there a better place that some of the more serious chemists here talk about things?

Not to hate on 420chan but I feel like there may be better places to discuss chemistry with people who are like minded. Perhaps IRC?
15 posts and 4 images omitted. Click View Thread to read.
press !AX.nZBombY - Thu, 21 Dec 2017 15:08:50 EST urbKaVqv No.78956 Reply
are you sure its unregulated and unwatched? that seems suspicious.
in germany we have multiple watch lists, some of which are "volunatrily" followed by suppliers.

id love me some, all youd need would be some hydrogen and Pd, but ill stick with postponing my "mescaline from baking aroma, antiseptic and rc fuel" pipedream for now
Bombastus Werrywag - Fri, 05 Jan 2018 16:46:24 EST uvAHW/WE No.78963 Reply
Yes. It's not specifically banned by anything I know of. He's been slowly taking a few mgs from it from work every every week and throwing it in a pile at his house. I can tell him to sell it on ebay or on his local craiglist, too. Probably among some other research chemicals used for plastics and vinyls as he does that for a hobby in his barren wasteland of a house in my barren wasteland of a town in the giant barren wasteland that is Canada.
Cornelius Bunham - Thu, 11 Jan 2018 22:17:09 EST hBAZGxou No.78967 Reply
Learn to speak Russian

Mercury Storage

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- Thu, 04 Jan 2018 19:11:36 EST UniRKo9r No.78958
File: 1515111096151.jpg -(3326056B / 3.17MB, 5312x2988) Thumbnail displayed, click image for full size. Mercury Storage
sup /chem/

I have a small elements collection and I needed to know about the storage of a small amount of mercury...

I have (attached) glass vial bought from Hobby Lobby for like 2$. I am wondering if it would hold a small amount of mercury. We're talking 5mL maximum, probably less (may fill up an inch of the bottom of the vial). The top glass cork will be wrapped with a few layers of parafilm from my lab. It will be on a sort of "display" shelf, not behind any glass but out of reach to be knocked over. I am more worried about the vapors that could possibly form over time than any spillage.

Any input would be appreciated,
1 posts and 1 images omitted. Click View Thread to read.
press !AX.nZBombY - Fri, 05 Jan 2018 15:20:50 EST 4D6UnT/b No.78960 Reply
id get a thinner container to let it show more of its shiny toxicity, and maybe get something threaded. doesnt look as chemistry-y but itd be much more convenient

you could store it under mineral oil to reduce oxidation and evaporation

i am neurotox man //
410,757,864,530 DEAD CHEMISTS
Bombastus Werrywag - Fri, 05 Jan 2018 16:42:53 EST uvAHW/WE No.78961 Reply
get yourself these

and seal the ends using a propane torch. look up "ampoule sealing"

That way you can still play around with the mercury in a fun size. When not in use, wrap the test tube in a piece of aluminum foil coated bubble wrap insert. If the mercury escapes, it'll go right into the aluminum which will make it less hazardous as it's a mercury capture mechanism. For spills, use powdered sulfur. You can buy that on ebay in like 100g quantities.
Cornelius Dummlelare - Sun, 07 Jan 2018 02:26:09 EST UniRKo9r No.78965 Reply
Thank you for the replies. I ordered myself some of the shown test tubes and am not sure how long they will take to arrive to me. I currently have a very small amount (barley covering the bottom) held in the glassware shown, with several layers of parafilm and it is being kept outside. I believe this should sufficiently hold until I am able to make ampules.


I do a lot of cough syrup

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- Mon, 23 Oct 2017 16:30:22 EST yfT/VnIi No.78884
File: 1508790622871.jpg -(1441692B / 1.37MB, 2550x3300) Thumbnail displayed, click image for full size. I do a lot of cough syrup
i am artist who does a lot of dissocitatives

dissociatives involve a lot of nonsense
i have no talent in chemistry but i wanted to show you this
this KLSSTR is nonsense (benzene?)

but alas
alchemy is the precursor to chemistry
six rocks can be achemically arranged in a 6grid if you write K L S S T R in sharpie on them
use this knowledge to advance the chemistry my dear friends


My dad is a bretty good chemist
>gregory kaplan
10 posts and 2 images omitted. Click View Thread to read.
Bombadoodle Wolframwag - Thu, 09 Nov 2017 21:42:53 EST od/nOgRU No.78903 Reply
heh, yeah. the attitude here is nice since we're all on some sort of drug. also because memes.

also because you can literally just check this board once a month and be "up to date" with the /chem/. same thing with /other/ and /hooch/ and basically every board... nvm i kinda miss old /chem/, yeah.

Blood sttranded

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- Sun, 05 Nov 2017 15:33:50 EST Wd54ldDh No.78892
File: 1509914030601.png -(311159B / 303.87KB, 471x459) Thumbnail displayed, click image for full size. Blood sttranded
What does blood get like really after large amounts of it leave the body and stay on the ground like in a war-field?
2 posts omitted. Click View Thread to read.
Phoebe Fanville - Thu, 23 Nov 2017 20:21:40 EST xdtGflx/ No.78923 Reply
a middle ages era battle field is probably one of the best fertilizer sources nature could have hoped for
Fucking Dartway - Sat, 25 Nov 2017 00:55:02 EST MdBNaDoT No.78925 Reply

I would agree with this. Decomposition, denaturation, and bacterial/fungal consumption would render blood into basic chemicals. As mentioned, full of potassium salts along with sodium/chloride/iron/copper/etc salts. The proteins would be be broken down into various organic chemicals or utilized by the local flora. Any saccharides floating around in the blood would be consumed almost immediately; nature likes sugars.

This is just my own speculation.

I got into University

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- Sun, 06 Aug 2017 16:10:13 EST +YUSEic8 No.78765
File: 1502050213796.png -(11782B / 11.51KB, 370x294) Thumbnail displayed, click image for full size. I got into University
So I went back to college recently to pursue chemistry, I just got accepted into a pretty good uni to do Organic chemistry.

Now since i'm not that young anymore I really need to do well and not fuck this up, so since i really enjoy chemistry and need to make this work i've been putting a whole load of effort into making sure it goes well.

Please give me some recommendations for pre uni reading so I can get a head start.

Also share experiences? I did a pretty short and condensed course to get here I learned all the basics during that but i've stilled missed out on a lot of stuff an 18 year old would have done at the college level, so i'm expecting my first week at uni to be a bit overwhelming and full of things i need to learn but then i've heard from a few people that it's like that for everyone no matter how much extra reading you've been doing.
27 posts and 4 images omitted. Click View Thread to read.
William Sicklefune - Tue, 28 Nov 2017 11:23:17 EST 6w3Nr5Vv No.78928 Reply
Always remember that you're always doing carbohydrates, ie carbon, hydrogen, and oxygen, that means no using acids, etc...
William Sicklefune - Tue, 28 Nov 2017 11:24:52 EST 6w3Nr5Vv No.78929 Reply
I apologize for the spam


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- Thu, 05 Oct 2017 11:42:33 EST +YUSEic8 No.78876
File: 1507218153397.jpg -(71488B / 69.81KB, 815x1080) Thumbnail displayed, click image for full size. Mathematics
I'm struggling with the maths of chemistry.

Anyone else hate the maths side of things? I see it as a necessary evil but I still hate it.
2 posts and 1 images omitted. Click View Thread to read.
press !XIxc6BpKnU - Tue, 07 Nov 2017 15:45:46 EST 4coI32Fl No.78897 Reply
im a bit ashamed to admit it but im still really happy i never had to do quantum physics .

one sort of "trick" that helped me to keep my motivation high enough to actually practice enough to pass was to come up with thought experiments or bullshit problems that required me to use the maths. using the idea work as play to your advantage gets really hard with stuff like a fucking particle on a sphere

a part from that i often find myself thinking "wow thats really interesting, im sure this is a fascinating concept, but id rather leave this to somebody else that actually enjoys this. id rather do retrosynthesis or let a computer do the calculating or eat ass right now

is there a particular area that you are struggling with

i remember those by using base ten stuff. you can quickly derive those by messing around with potencies of ten
Ian Pucklemare - Wed, 15 Nov 2017 11:47:19 EST +YUSEic8 No.78907 Reply
>is there a particular area that you are struggling with
Everything really, it's just i'm pretty fresh to all of this and have spent a long time out of education before going back into it. Things can kind of make sense when i tackle them head on but if a couple of days after that I come across a problem, i'll struggle to actually think of the best way to calculate an answer.

I can't think of any problems off hand but if one comes up i'll post it here.

>gets really hard with stuff like a fucking particle on a sphere
I did have some problems on this and it was bullshit. Can't the computers do all of this and i'll stick to learning my way around the organic labs.
Basil Bucklesuck - Mon, 20 Nov 2017 22:44:13 EST pmYWBMz8 No.78919 Reply
I used to sip whiskey and do chemistry hw when I was going to community college

I somewhat grew to like the elegance of trying to solve a problem with a line of fractions and words that cancel out.

gib stank token plis

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- Wed, 15 Nov 2017 12:52:49 EST UwpwKm1P No.78908
File: 1510768369587.png -(46191B / 45.11KB, 2080x656) Thumbnail displayed, click image for full size. gib stank token plis
Bombastus !uYErosQbLM!!Mybq1UbK - Thu, 16 Nov 2017 04:07:15 EST Fd7VfiYK No.78909 Reply
This can be a good thread. The society itself isn't based around alchemy but to achieve the golden standard through a thought process. Something against the scientific method but still very valid.
It used to be some sort of annoying half-cult but actually provided introspective determination for the members so long as you sign away a bit of your freedom and resources. Kinda like a church or a society of chemists (ACS) that later developed from this structure.

Leibniz's concept of a metaphysical Monad can fit nicely into the school of yestercentury. Something that I have yet to be able to understand fully but can see how it would tie to the alchemical societies back then. He predicted nuclear physics through the destruction of monads (mind to matter "transfer) instead of the more widely accepted concept of indivisible "particles". Though obsolete, it can still be applied today.

We need more metaphysical quantum alchemists today.

Organic synthesis

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- Sat, 28 Oct 2017 09:13:55 EST EfFKvnWj No.78885
File: 1509196435374.png -(1526865B / 1.46MB, 750x1334) Thumbnail displayed, click image for full size. Organic synthesis
Anyone have any books on organic synthesis. The basics how Synthesis works?

Chemistry is Fucking Crazy

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- Thu, 12 Oct 2017 18:54:47 EST UeKrF7rB No.78879
File: 1507848887987.jpg -(52812B / 51.57KB, 500x553) Thumbnail displayed, click image for full size. Chemistry is Fucking Crazy
I'm barely learning about hybridization theory and already it's requiring my fullest attention and focus to keep up with the concepts. Normally I can half-pay attention in anything from anatomy to calculus to history and grasp the underlying concepts with ease. Is it because I can't see the orbitals and electrons so my mind has difficulty making a "mental map" of it? I thought chem would be as easy for me as all the other sciences but it's shockingly complicated. I'm not even in O-chem yet. Will my brain adapt to this new mode of thinking and I will be okay?
Molly Chindlematch - Mon, 16 Oct 2017 20:03:15 EST JlSfW3Ow No.78880 Reply
tis normal, it's a good sign to study, good luck!

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