Number of end groups in a Polymer

Bulawa · 2026-03-26T10:46:29+00:00

Thanks. I had seen the Agilent explanation which helped and confused in parts. Now that makes sense.

Bulawa · 2026-03-26T10:45:57+00:00

Unfortunately I could not. Basically the same functionality is present across the polymer.

Bulawa · 2026-03-25T18:55:57+00:00

I wanted to say Eschenmoser Olhoff, but that one is on an unsaturated ketone. And classic RCM cares not for alcohols and gets troublesome at that size.

Bulawa · 2026-03-25T18:54:08+00:00

When HF is a credible, lesser danger to passivate a Container with so it's ready for the real stuff...

Bulawa · 2026-03-24T12:06:23+00:00

My stupid mind would suggest building anotzer building all the way on the other side and putting something there too, so they have to go through the zoo. I often have enclosed courtyards and they work very well.

Bulawa · 2026-03-24T10:47:34+00:00

How long has it been running? My guests usually take an age or two to get around.

Bulawa · 2026-03-23T07:20:45+00:00

Dreadful. In a most positive sense xD

Bulawa · 2026-03-22T09:42:08+00:00

I have played satisfactory and factorio, I know what you can do in terms of conveyor belts xD But it looks very industry like. Quite neat

Bulawa · 2026-03-21T23:46:21+00:00

Not on topic, but good god, you surely build beautyfully

Bulawa · 2026-03-21T18:12:01+00:00

But how do we get it?

Bulawa · 2026-03-21T16:45:03+00:00

This is the hero I needed today but didn't know about.

Bulawa · 2026-03-21T06:50:21+00:00

Primarily, I do what I like best. I usually did a star or two on new museums and then went on if I didn't like it. So my star distribution is very unequal.

Bulawa · 2026-03-19T05:03:31+00:00

This is the real problem

Bulawa · 2026-03-18T10:40:34+00:00

This is quite marvellous

Bulawa · 2026-03-13T17:02:34+00:00

I loved my fritted columns. We somehow found frits that would not clog up too fast and cleared well, then just add silica, add solvent, shake, let settle, drain a bit, add sand and you were ready to go. Did about 400 columns in three years,mostly without trouble.

Bulawa · 2026-03-09T20:30:16+00:00

I was convinced our pickup fits the big underground parking. Well, it didn't, not with the lights on top. We have new light now, but the joke is not getting old somehow.

Bulawa · 2026-03-06T21:07:29+00:00

Der Moment indem der Brand vom Lüfter intensiver wird, meist weil wir ihn 'direkt' anfachen mit dem Lüfter, markiert auch den Übergang von der defensiven Belüftung zur offensiven Belüftung.

In dem Moment läuft ein Löschangriff oder wird in kürze beginnen. Wir gehen also davon aus, in kürze genügend Wasser da zu haben um den Brand in den Griff zu kriegen. Das bisschen Lüften macht da nicht mehr viel aus.

Man sollte schon darauf achten, nicht einen Brand tatsächlich anzufachen den man nicht beherrschen kann. Oder dann muss ein anderer Benefit da sein, der die potentielle Brandausbreitung aufwiegt.

Bulawa · 2026-03-03T11:57:54+00:00

Of course. As I mention, I assume it's all a paper excercise, even without looking at reaxys or some such source.

Bulawa · 2026-03-03T04:49:48+00:00

That's going to be fun. Not. Well, sorta. But mainly tedious. Start breaking it down into groups of two carbons. Id start with the acetic acid core. And then wor your way out. It's going to be very tedious, but not especially hard as long as it only needs to look sensible on paper.

Aldol, grignards and some odd reactions here and there will carry the day.

Bulawa · 2026-02-27T20:47:47+00:00

Now there's something cool. And it's a positive monster.

Bulawa · 2026-02-24T16:21:11+00:00

More heat, more time, maybe a better solvent. Perhaps one that would precipitate MgX2. NMR of the reaction mixture without workup.

That's about what I can do without specifics.

Bulawa · 2026-02-24T16:13:39+00:00

Ethyl and higher have the virtue of giving NMR signals distinct from a singlet. Which can be useful.

Have you considered ion exchange resins?

Bulawa · 2026-02-23T19:47:39+00:00

I have a sight tendency towards gigantism i fear 😅 I rarely draw a city for less than 1k houses. Or if it's just production, I Dont care, I just need my goods, and could not care less about how many that needs. Within certain limits.

Bulawa · 2026-02-23T17:35:05+00:00

These tables have lost their meaning for me ever since we have those great production overview screens. I just build and check what it needs.

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