The flurry of lab activity that I've had the last few weeks since I started this blog was due to being home for the holidays. I had more time than I'd had in months to work on my home chemistry projects. Even so, there was far more to do than I had time for, so … Continue reading Back to School
As it turns out, the crystals of "Martius yellow" that I recovered from the acetone washings are truthfully not Martius yellow. Unfortunately, I failed to realize this until after I recrystallized my entire supply. The compound, while also an intensely colored yellow-orange dye, is much darker in the solid form than Martius yellow acid. It … Continue reading Update on Martius Yellow- Don’t mix with acetone!
Yesterday I purchased a vintage Mettler balance, circa 1961, if I estimate correctly from what little information I can find about them. It is the B5 model, which was first released in 1955, and manufactured through the 60s. Official Mettler service for them was discontinued in 1972, though it appears they had already stopped selling … Continue reading Recent Acquisition- Vintage Mettler Balance
This is a picture of some Martius yellow that was recrystallized from acetone (this is the stuff that I rinsed off of my glassware). I hadn't expected it to form such nice crystals. I think I will recrystallize all of it since it does. UPDATE: This is not Martius yellow. Acetone apparently reacts with Martius yellow, … Continue reading Martius Yellow Recrystallized
Today I made a second attempt at synthesizing the dye Martius yellow (2,4-dinitronaphthol). Unlike the previous attempt, I used more gentle heating, by way of an improvised steam bath, and this led to the expected results. Procedure: As before, 10 mL of conc. sulfuric acid (95%) was added to 5.00 grams of 1-naphthol, this time in … Continue reading Synthesis of Martius Yellow – Success
Currently I have a few big projects that I'm working on concurrently that all of my lab time is contributing to in one way or another. I thought it would be good to set down an outline of what these are. Tetraphenylmethane total synthesis My main interest is organic synthesis, and being fairly new to … Continue reading An Overview of my Long Term Projects
Yesterday I decided to take a stab at a reaction that is famous among amateur chemists- the reduction of potassium hydroxide to elemental potassium using magnesium, catalyzed by a small amount of t-butanol. Unfortunately, I couldn't seem to get the reaction mixture hot enough, so nothing happened, but this is what I did: Procedure Using … Continue reading Failed Attempt at Potassium Isolation
As you can see, I now have a blog! I had been debating a lot about whether or not to continue my YouTube channel. On one hand, I enjoy sharing my experiments with others, and I like getting public feedback. On the other hand, I realized that I hate editing videos, and if you've seen my videos, you'll … Continue reading Hello!
I attempted to synthesize Martius yellow (2,4-dinitro-1-naphthol) today using the procedure from Fieser's Experiments in Organic Chemistry, which may be found in the Sciencemadness library. Unfortunately, I did not get the expected results. Procedure: 10 mL of 95% ACS grade sulfuric acid was added swiftly to a 50 mL Erlenmeyer flask containing 5 grams of … Continue reading Failed synthesis of Martius yellow
This morning I decided to purify some of the commercial 1-naphthol that I have. 1-naphthol is supposed to be a pure white solid, but the commercial stuff that I have is light brown, despite being an unopened bottle from Acros Organics and claiming 99+% purity. I suppose it's either old or whatever the brown impurity … Continue reading Purification of commercial 1-naphthol