Scellan: Difference between revisions
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The reaction that we'll be doing to make the anisole is called the Williamson ether synthesis, and I'll cover the mechanism later on in the video. In terms of chemicals, we have four major reagents: sodium metal, methyl iodide, phenol and methanol. We'll also need some sodium hydroxide, some dry calcium chloride, and some dichloromethane for the workup. To start things off, I added 150 mL of dry methanol to a round bottom flask. Once I'm done adding the methanol, I then move on to preparing the sodium metal. Before the sodium metal can be used, we first have to clean off the mineral oil that it was stored in, and then we have to chop it up into smaller pieces. Using a knife I took out a reasonably-sized chunk, and I tried to wipe away as much oil as I could using a paper towel. When I felt like most of the oil had been removed, I dropped the sodium into a beaker. I fill the beaker with toluene until the sodium is covered. Mineral oil is soluble in toluene, so this is just an added step to get rid of as much of the oil as possible. Using my very rusted knife, I try to agitate things as best as I can. After something like a minute, I felt like it had been washed decently enough, so I took it out and placed it on some paper towel. Now for the slightly more fun part where we get to cut the sodium and weigh out about 8 grams. Using my knife, I cut away some moderately-sized pieces and I place them on the scale. The freshly cut sodium is nice and silver, but it very quickly tarnishes. Once about 8 grams are weighted out, I put the sodium to the side and remove the scale. The sodium metal that is left over that we don't need is placed back under mineral oil for storage. Coming back to the round-bottom flask with the methanol in it, I go ahead and dump in all of the sodium. You can see that the sodium reacts quite vigorously immediately after being added. The reaction is going to heat the methanol to its boiling point, and a lot is going to boil off, so it's very important to have a high-efficiency condenser. | The reaction that we'll be doing to make the anisole is called the Williamson ether synthesis, and I'll cover the mechanism later on in the video. In terms of chemicals, we have four major reagents: sodium metal, methyl iodide, phenol and methanol. We'll also need some sodium hydroxide, some dry calcium chloride, and some dichloromethane for the workup. To start things off, I added 150 mL of dry methanol to a round bottom flask. Once I'm done adding the methanol, I then move on to preparing the sodium metal. Before the sodium metal can be used, we first have to clean off the mineral oil that it was stored in, and then we have to chop it up into smaller pieces. Using a knife I took out a reasonably-sized chunk, and I tried to wipe away as much oil as I could using a paper towel. When I felt like most of the oil had been removed, I dropped the sodium into a beaker. I fill the beaker with toluene until the sodium is covered. Mineral oil is soluble in toluene, so this is just an added step to get rid of as much of the oil as possible. Using my very rusted knife, I try to agitate things as best as I can. After something like a minute, I felt like it had been washed decently enough, so I took it out and placed it on some paper towel. Now for the slightly more fun part where we get to cut the sodium and weigh out about 8 grams. Using my knife, I cut away some moderately-sized pieces and I place them on the scale. The freshly cut sodium is nice and silver, but it very quickly tarnishes. Once about 8 grams are weighted out, I put the sodium to the side and remove the scale. The sodium metal that is left over that we don't need is placed back under mineral oil for storage. Coming back to the round-bottom flask with the methanol in it, I go ahead and dump in all of the sodium. You can see that the sodium reacts quite vigorously immediately after being added. The reaction is going to heat the methanol to its boiling point, and a lot is going to boil off, so it's very important to have a high-efficiency condenser. | ||
===From a manifesto (in translation from | ===From a manifesto (in translation from Windermere)=== | ||
:{{biggentium|Ys dy cŋyrhlyn mawr savísi, ðrwanyn øølyv, as jysn hwrþol a tarçǿmy sawvn?}} | :{{biggentium|Ys dy cŋyrhlyn mawr savísi, ðrwanyn øølyv, as jysn hwrþol a tarçǿmy sawvn?}} | ||
:Q in trunk-COL tree towering, lake-COL heaven and mountain-COL craggy DET reside goodness-COL | :Q in trunk-COL tree towering, lake-COL heaven and mountain-COL craggy DET reside goodness-COL | ||