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Help getting into organic chemistry
After already learning general chemistry I took up the task to read Claydens, Greeves, Warren and wo ...
22-5-2019 at 09:04
by: Sigmatropic
Troubles with Lithium-Halogen exchange reaction.
Gather some in process control samples. Specifically quench a sample with some protic solvent and ta ...
19-5-2019 at 01:53
by: Sigmatropic
Heavy metals waste
For copper specifically, I add aluminium foil wait for the exothermic reaction to set in.
Ot if th ...
10-5-2019 at 08:25
by: Sigmatropic
A little question about Wittig reaction.
I would explain it by the oxophilicity of phosphorus.
I usually assume the oxophosphetane can colla ...
26-4-2019 at 23:15
by: Sigmatropic
Making Nitric Acid from Sodium Nitrate and Hydrochloric Acid
An month spent in the laboratory will save a day spent in the library.

You are a kw3l and you sho ...
16-4-2019 at 10:14
by: Sigmatropic
Dumb Question
Generally speaking there are two types of chlorination.

1) electrophilic chlorination typically u ...
4-4-2019 at 01:58
by: Sigmatropic
phenyl ring and piracetam
Depends on where on the molecule you'd want to put it. It would be interesting if you tell us where ...
25-3-2019 at 01:31
by: Sigmatropic
Nitration of 2-EH
Nitroso compounds, nitrite esters? I've seen them blue and green and would not be suprised to see th ...
22-3-2019 at 16:20
by: Sigmatropic
Working out concentration
For most acids there are charts where one can look up what density corresponds to what concentration ...
18-3-2019 at 21:44
by: Sigmatropic
Predicting the color of an organic compound
The 4-fluoro has been reported as a yellow solid. I would be quite confident in predicting this comp ...
17-3-2019 at 14:00
by: Sigmatropic
dcm-water separation
This gets interesting when you have an organic salt in there, I've had a three layer system with eth ...
15-3-2019 at 11:43
by: Sigmatropic
dcm-water separation
Ya, your aq. solution will have been very concentrated and thus more dense than the DCM. Check misci ...
15-3-2019 at 11:39
by: Sigmatropic
dcm-water separation
Did you take the lower layer of the initial basic biphasic mixture? It appears you have collected th ...
15-3-2019 at 09:33
by: Sigmatropic
Predicting the color of an organic compound
Based on the color of benzylideneacetone I would be made to believe this compound is yellow. I'll ru ...
12-3-2019 at 14:27
by: Sigmatropic
How to concentrate azeotropic HNO3?
No, NO2 has a different and lower oxidation state than NO3- hence there has to be a reduction before ...
6-3-2019 at 12:41
by: Sigmatropic
New proposal for EU regulations
Can you find annex 1? my search comes up short but apparently they define maximal legal threshold co ...
21-2-2019 at 09:48
by: Sigmatropic
Recycling acetone after use in dry ice bath
Where does dry ice come from? Considering how cheap it is I would guess it's a byproduct from an ind ...
21-2-2019 at 09:24
by: Sigmatropic
rururu
No. The ketone stays a ketone during substitution.
16-2-2019 at 11:07
by: Sigmatropic
HOLY MARY MOTHER OF GOD! Hoffman made LSD without making LSD?
No reference, I call bullshit.

This has been suggested before, that the high experienced by hoffm ...
15-2-2019 at 13:06
by: Sigmatropic
Need advice on ester formation
10 minutes of searching later: http://www.orgsyn.org/demo.aspx?prep=CV4P0084

Be sure to check out ...
14-2-2019 at 14:17
by: Sigmatropic
Need advice on ester formation
Fischer esterferication of 2-bromoethanol and benzoic acid comes to mind. This method is used alot i ...
14-2-2019 at 14:09
by: Sigmatropic
Chloroform in ether synth?
Agree with fusso, Except that the oxygen lithium bond is stronger than sodium oxygen. In my experien ...
12-2-2019 at 11:40
by: Sigmatropic
Organic copper salts
It seems they are generally prepared by buffering a solution of amino acid with an alkali acetate an ...
8-2-2019 at 11:13
by: Sigmatropic
Organic copper salts
Don't bother with copper anthranilate, it is simply too insoluble. Or at least for what I intend to ...
8-2-2019 at 09:07
by: Sigmatropic
Organic copper salts
I should point out that those are not my pictures, unfortunately.
8-2-2019 at 03:53
by: Sigmatropic
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