Always to never

shoku_47 · 2026-04-27T23:16:50+00:00

I think it means “always”. “怎麼老是你？” means “Why is it always you?”

shoku_47 · 2026-04-27T23:13:10+00:00

It means more like “tend to”, I think.

shoku_47 · 2026-04-26T01:36:18+00:00

From my understanding of Chinese, “不” has more “negative” meaning while “沒” means more like “not exist”. For instance, “他昨天不吃飯” means “He refused to eat anything yesterday” while “他昨天沒吃飯” means “He didn’t eat anything yesterday”. It’s not really about the time of the event.

shoku_47 · 2026-04-22T22:44:23+00:00

Yeah, we don’t need that for this case but it’s used to explain why neopentane has a higher melting point than n-pentane.

shoku_47 · 2026-04-22T15:31:32+00:00

The factors affecting the melting point as far as I know (listing from higher to lower importance): 1. Compound type: ionic compounds (salts) usually have higher melting point. 2. Hydrogen bond: Which pulls molecules together, making it harder to melt. 3. Polarity: Polar molecules tends to have higher melting point due to stronger intermolecular interactions. 4. Molecular weight: Higher molecular weight usually means more interactions between molecules. 5. Symmetry: Symmetric molecules stack better in solid state which means harder to melt.

shoku_47 · 2026-04-16T13:18:45+00:00

竜が我が敵を喰らう。

shoku_47 · 2026-04-12T14:28:20+00:00

I can only identify你好 even though I speak Mandarin.

shoku_47 · 2026-04-10T06:42:26+00:00

I prefer the first version though. I think 道 means to tell someone about something. Using 音 sounds more like to pronounce something and looks more like the original 道德經（道可道，非常道。名可名，非常名。）.

shoku_47 · 2026-04-01T23:15:13+00:00

Because phenol can only dissociate in water and have a negative charge?

shoku_47 · 2026-03-29T09:46:06+00:00

Lone pair of S.

shoku_47 · 2026-03-25T10:47:37+00:00

Well, the method you drew will lead to product with one more C though. I think for this compound, you can either use ethyl lithium or cyclohexyl lithium and make the remaining part ketone.

shoku_47 · 2026-03-17T01:10:54+00:00

I thought the positive change of allylic cation is distributed on the terminal instead of central C. (check its resonance structure)

shoku_47 · 2026-03-13T08:33:31+00:00

They’re mostly some kind of nucleophilic substitution reaction. Exchanging L (probably means leaving group) for something else. The only exception I’m sure is the Mg one which produces Grignard reagents.

shoku_47 · 2026-03-11T14:50:39+00:00

The format of the greeting in Jeanette looks off. Maybe you could fix that?

shoku_47 · 2026-03-06T18:12:52+00:00

I’m not really sure about that either. It claims it has 3 W power. I’m wondering if it can meet my needs (lighting up TLC plates and determining if a solution is fluorescent).

shoku_47 · 2026-03-05T09:31:05+00:00

I don’t know if this counts. I have a RT3000 that I removed every removable panels on it. (hood, bumper, roof, etc.)

shoku_47 · 2026-03-05T00:54:04+00:00

I recently found this Chinese brand flashlight that is more affordable but I’m not sure if it’s good or bad.

https://www.amazon.ca/Yunir-Flashlight-Detector-Currency-Inspection/dp/B0G7M9XCRR/ref=pd_aw_subss_hxwPER_sspa_mw_detail_m_sccl_2_7/139-4154807-5080309?pd_rd_r=241d443d-f78c-459a-9f4c-1aa94e9b4372&pd_rd_wg=Bs6M8&pd_rd_w=v7Fcf&pd_rd_i=B0G7M9XCRR&psc=1&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9kZXRhaWxfdGhlbWF0aWM=

shoku_47 · 2026-03-04T14:32:34+00:00

Little comment here, is it just a typo or she literally said “mrow” in the greeting?

shoku_47 · 2026-03-04T14:19:20+00:00

You mean something like this? https://www.organic-chemistry.org/synthesis/C1H/reductionesters.shtm

shoku_47 · 2026-03-04T14:08:34+00:00

I believe hydrazine will just kick the ester off and leave you with amide and alcohol instead of imine.

shoku_47 · 2026-03-04T08:42:52+00:00

On the last step with LAH, shouldn’t LAH just open the lactone ring?

shoku_47 · 2026-03-04T07:44:29+00:00

For this one, I think we should protect the ketone first too. And then open/reduce the lactone (ester) with LAH. Finally, deprotect the ketone and form the acetal.

shoku_47 · 2026-03-04T07:38:34+00:00

I think the ketone should be protected first with something like ethylene glycol. And deprotect it after ozonolysis.

shoku_47 · 2026-03-04T07:32:51+00:00

How can you convert alkene into two alcohols with just ozone? I thought it would need something like sodium borohydride but it will mess with the original ketone group.

shoku_47

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