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poormanschemist

PoorMansChemist

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The channel isn't going anywhere. I am planning some lecture videos to hold you guys over during this transition period. Once the move is done no matter where I end up I will start doing prep videos again. I will simply adapt them to fit my new circumstances and we will soldier on. :-)

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Preparation and detonation of about 3.25 grams of thallium(I) azide. The compound is easily made from thallium(I) nitrate and sodium azide. It is not as sensitive as lead azide but it will still detonate on sudden heating or shock. The explosion produces a cloud of thallium metal particles making the smoke very poisonous.

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My first successful prep of the highly exotic and extremely poisonous thallous cyanide. This prep should only be attempted by experienced amateur and professional chemists with good lab technique. TlCN is used in organic synthesis.

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How to make cadmium cyanide from cadmium sulfate and sodium potassium cyanide. Cadmium cyanide is photosensitive so this prep is best done under low light. The compound is extremely poisonous and readily produces dust when dry.

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Preparation of thallium(I) nitrate from thallium sulfate by metathesis with barium sulfate followed by filtration and crystallization. Got some excellent timelapse video of the crystallization process; some of my best in my opinion.

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Doing research for the book (the second chapter is on legal issues) I've come across some trends that I'd like to address.

Disclaimer: The information shared in this video are my opinions. They should not be regarded as any kind of legal advice. If you are having legal problems you need to talk to a lawyer or other qualified legal expert for advice on how to handle your case.

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A far superior prep of thallium(I) sulfate than anything I have shown before. Doing it this way dissolves the metal over a couple hours whereas if you just try to dissolve thallium in sulfuric acid it will take several days of heating and stirring.

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New video. While tinkering with the reaction between sodium and tellurium I stumbled across a way to slow the reaction down and actually produce a decent amount of sodium telluride. Normally this combination of the elements just explodes much like the combination of sodium and sulfur which is the lighter congener of tellurium.

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A review of reagent tests used to check common pharmaceuticals.

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National Institute of Justice Color Test Reagents/Kits for Preliminary Identification of Drugs of Abuse:
https://www.ojp.gov/pdffiles1/nij/183258.pdf

The Development Of Paper Microfluidic Devices For Presumptive Drug Detection:
https://sci-hub.se/10.1039/C5AY01432H

The Use Of Presumptive Color Tests For New Psychoactive Substances:
https://sci-hub.se/10.1002/dta.1847

Tackling Poor Specificity of Cocaine Color Tests by Electrochemical Strategies:
https://sci-hub.se/10.1021/acs.analchem.8b00876

Chemical Profiling Of Cannabis Sativa From Eleven Tanzanian Regions:
https://www.researchgate.net/publication/370534120_Chemical_profiling_of_Cannabis_sativa_from_eleven_Tanzanian_regions

The ISCC-NBS Colour System
https://www.munsellcolourscienceforpainters.com/ISCCNBS/ISCCNBSSystem.html

Chemistry and Reaction Mechanisms of Rapid Tests for Drugs of Abuse and Precursors Chemicals
https://www.unodc.org/pdf/scientific/SCITEC6.pdf

A video on the chemistry of the phenethylamine hallucinogens.

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Synthesis of Conformationally Restrained Serotonin 2A Agonists:
https://www.docdroid.net/CyL8RLd/thesis-pdf
Color Test Reagents/Kits for Preliminary Identification of Drugs of Abuse:
https://www.ojp.gov/pdffiles1/nij/183258.pdf

Proving that the benzaldehyde prep from benzyl alcohol using (bis)pyridinesilver(I) permanganate did indeed work by measuring the melting point of the benzaldehyde dinitrophenylhydrazone obtained from the experiment.

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In this video I demonstrate the extremely easy prep of benzaldehyde from benzyl alcohol using (bis)pyridinesilver(I) permanganate in dry benzene. The prep takes about 30 minutes. The paper this is taken from is "Bispyridinesilver permanganate[Ag(C5H5N)2]MnO4: an efficient oxidizing reagent for organic substrates" and it's DOI is 10.1016/S0040-4039(00)86758-1.

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Verifying that the copper chromite catalyst that I made does work by using it to make pyridine from niacin. The thumbnail is a picture of vapor deposited niacin crystals on the side of the flask.

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In this video I carry out the prep of copper chromite Cu2Cr2O5 which is used as a catalyst in organic chemistry. It can be used to catalyze the thermal decomposition of niacin into pyridine and benzoic acid into benzene.

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Prep Protocol For Copper Chromite

12.6 grams ammonium dichromate
25 grams copper(II) sulfate pentahydrate
42 mL of 10% aqueous ammonia
260 mL of 10% acetic acid.

1. In separate beakers dissolve the ammonium dichromate in 33 mL of distilled water and the copper(II) sulfate pentahydrate in 60 mL of hot water.

2. Slowly add the 10% aqueous ammonia to the beaker containing the ammonium dichromate solution with stirring in order to convert it into an ammonium chromate solution.

3. Slowly add the solution of of ammonium chromate to the copper(II) sulfate solution with rapid stirring. The brick red copper ammonium chromate will precipitate in an exothermic reaction. Allow the mixture to stir for about 5 minutes to ensure that the reaction is complete.

4. Filter out the precipitate using vacuum filtration. This filtration can be difficult and it is not necessary to filter to complete dryness.

5. Transfer the copper ammonium chromate paste to an evaporating dish and mostly dry it out over a boiling water bath.

6. Crush the mostly dry copper ammonium chromate to a fine powder. Return to the evaporating dish to complete the drying process.

7. Transfer the dry copper ammonium chromate into a crucible and heat the powder over an open flame. Heat gently for about 10 minutes thereafter increasing in intensity until the temperature is approximately 400 oC. Maintain this temperature for about 10 minutes after which the powder should have turned completely black.

8. Once the catalyst is cooled add it to a beaker containing 130 mLs of 10% acetic acid solution with stirring. Allow to stir for about 10 minutes.

9. Decant the supernatant and then wash with another 130 mLs of 10% acetic acid for about 10 minutes.

10. Allow the solid to settle for about 10 minutes.

11. Separate the copper chromite catalyst from the liquid by vacuum filtration rinsing all the solid from the beaker with distilled water.

12. Dry the powder in an evaporating dish to obtain the dry catalyst. Copper chromite is stable with regards to moisture and air.

Dougs Lab video on copper chromite prep: https://www.youtube.com/watch?v=4L5AGGfxFBc&t=33s

An odd and obscure compound from the pages of the Handbook of Preparative Inorganic Chemistry (pages 296-297).

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A very easy prep of a polyoxometalate whose formation was used for the determination of phosphate and phosphoric acid. This is then easily reduced to molybdenum blue.

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How to make cesium tetrachloroiodate from cesium chloride, iodine, and chlorine gas.

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Created 4 years, 7 months ago.

329 videos

Category Science & Technology

Educated redneck makes obscure and exotic chemical compounds in his backyard.

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