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Unexpected ruby red colour
OMG..... another useless topic about playing impure chemicals.
This is not chemistry, but pure amat ...
14-3-2018 at 13:43
by: kmno4
Nitroguanylurea
It looks like the article from [i]Gazzetta chimica Italiana[/i] gives wrong compound, used as the su ...
10-2-2018 at 09:45
by: kmno4
Color of Phenylacetone
[rquote=505289&tid=80128&author=Master of the Elements]
Is phenylacetone truly colorless?
...
30-1-2018 at 03:13
by: kmno4
Crystallisation of divalent metal sulfates in excess of sulfuric acid
[quote]
The value is given as 8,85 %.[/quote]
This value is taken from the reference:
[code]http: ...
28-12-2017 at 01:50
by: kmno4
Preparation of Diethyl Sulfate
[quote]Na2SO4 is added to the pot as a dehydrating agent.[/quote]
Of course, Na2SO4 cannot serve as ...
23-12-2017 at 13:40
by: kmno4
Crystallisation of divalent metal sulfates in excess of sulfuric acid
[rquote=501152&tid=79158&author=Vylletra Heart]I fear that the excess acid can protonate sul ...
21-12-2017 at 14:32
by: kmno4
Failed attempt at making NO2Cl
[quote]From literature I understood that ..... reaction is said to be smooth and complete[/quote]
I ...
20-12-2017 at 16:49
by: kmno4
Chemistry of Terephthalic acid
[rquote=500735&tid=63196&author=Boffis]Hi kmno4, to get the 90% yield do you mean you had to ...
20-12-2017 at 02:51
by: kmno4
Separating Gd, Ce, and Nd
[rquote=500606&tid=79020&author=elementcollector1](...)The proposed method was electrolytic ...
16-12-2017 at 14:22
by: kmno4
Chemistry of Terephthalic acid
[quote]For Na2S2O4 reduction it was:
2 g of nitro-TPA, 5,8 g of Na2S2O4 (assuming ~85% purity), 2,3 ...
16-12-2017 at 14:18
by: kmno4
Reduce cinnamaldehyde to hydrocinnamaldehyde
This "review" about Mg/MeOH, from COCh, again returns like shitty boomerang.
And again returns refe ...
30-11-2017 at 13:49
by: kmno4
p-benzoquinone+acetone condensation
Thanks for the informations.
From time to time, I still think about this reaction, ha.
I attach th ...
29-11-2017 at 12:45
by: kmno4
Chemistry of Terephthalic acid
For Na2S2O4 reduction it was:
2 g of nitro-TPA, 5,8 g of Na2S2O4 (assuming ~85% purity), 2,3 g of N ...
29-11-2017 at 12:38
by: kmno4
Chemistry of Terephthalic acid
[b]Reduction of nitro-TPA (II)[/b]
a) Fe
2 g of nitro-TPA, 2 g of NaCl, 2 g of pulverized Fe, ~50 ...
29-11-2017 at 02:34
by: kmno4
Chemistry of Terephthalic acid
[b]Nitration of TPA[/b]
Additional runs and interesting observations.

1) 6 g of TPA, 5 g of KNO3 ...
19-11-2017 at 12:51
by: kmno4
An unknown, yellow Nickel compound
[rquote=496985&tid=78099&author=Tetra]An unknown, yellow Nickel compound [/rquote]
This is ...
11-11-2017 at 08:47
by: kmno4
Chemistry of Terephthalic acid
Boffis, I made this titration with phenolphthalein as indicator, because it changes its colour at pH ...
1-11-2017 at 12:41
by: kmno4
Chemistry of Terephthalic acid
[b]Nitration of TPA[/b]
Trial run.

To 100 cm3 Erlenmeyer flask with 30 g of conc. H2SO4 and magn ...
26-10-2017 at 16:10
by: kmno4
Nitration of phthalic acid
Part 2, 3NPA

Cooled (r.t.),pasty post-nitration mixture is transfered (several portions) with aid ...
13-10-2017 at 11:02
by: kmno4
Nitration of phthalic acid
Acronyms:PHA - phthalic acid;PHAN - phthalic acid anhydride; 3NPA 3-nitrophthalic acid; 4NPA 4-nitro ...
27-9-2017 at 13:59
by: kmno4
Optimizing Henry reaction conditions (substituted benzaldehydes + nitromethane)
[rquote=492018&tid=76743&author=Melgar][b]Optimizing Henry reaction conditions (substituted ...
14-9-2017 at 07:09
by: kmno4
Most hydrophilic: MgO, CaCl2, Cu(NO3)2, Ca(NO3)2, CuSO4, NH4NO3 - Very interesting Results!!
[rquote=491815&tid=76664&author=RogueRose]
MgO - Side walk deicer[/rquote]
:D
Funny (or s ...
9-9-2017 at 11:46
by: kmno4
Good way to Methylamine HCl?
No, I used iron scraps of all possible kind: corroded and not corroded nails (1-5 cm long), wire (ab ...
25-6-2017 at 13:34
by: kmno4
What exactly is the reaction between methylene chloride and aluminum?
[rquote=480572&tid=73271&author=Boffis]
In the abstract you give they give a reference [25] ...
19-6-2017 at 13:23
by: kmno4
Good way to Methylamine HCl?
[rquote=485303&tid=1261&author=Mush][rquote=156061&tid=1261&author=kmno4]I have just ...
17-6-2017 at 14:33
by: kmno4
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