Everything posted by exchemist
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Which alkene is more stable?
But with E1 it will be a carbocation, surely, which Me can stabilise as alkyl groups are slightly electron-donating? (I admit it's many years since I did this stuff.)
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Which alkene is more stable?
If it's E2, surely there is no charged intermediate, is there? If it's E1, I think I'd expect Cl- to leave and the resulting carbocation to be stabilised by Me. Or am I getting mixed up?
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Which alkene is more stable?
That's because it's been eliminated in the formation of the double bond.
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Which alkene is more stable?
OK but won't the Me group influence the proportions of 2-3 vs. 3-4 double bonds? What effect do you expect it to have?
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The West will continue to fall, since the politicians use lies to fight with Russia
China and N Korea are ruled by totalitarian despots like Putin, so the answer is obvious. Vietnam has not sided with Russia but is maintaining a neutral stance. The rest of your post is too incoherent to respond to - though a sort of blurred hatred of the West seems to come through.
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Which alkene is more stable?
Ah, is this about the Zaitsev Rule?
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Which alkene is more stable?
What does "do an E2 with NH3 on the 2-metyl-3R-Cl-4S-F pentane"mean? E2 I assume means an elimination reaction, somehow involving ammonia, but what are the substituents on pentane and what were the 2 products? There seems to be a .jpg file attached which we can't see. If you use a few more words, it may help to clarify what this is about.
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Does darkness exist ?
This is so idiotic I burst out laughing.
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Is it wise to freeze energy prices ?
Yes there's a lot of pious nonsense talked by Truss about not putting companies off investing. But the business cases on which these oil and gas, or renewable generation, investments were made never envisaged profit margins anywhere close to what they are earning at present, thanks to Putin and the war. I am convinced the major fossil fuel companies expect to have some of it clawed back. But they are not going to volunteer to hand it back, obviously, because of duty to their shareholders.
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how hard do you need to hit nitroglycerin to ignite it
Yes, you're right about 3.7. I was quoting only an approximate figure. I used to make "nitrogen tri-iodide" * at school, which we painted on the stone steps to the lab. When the teacher arrived his heels crackled and emitted little puffs of purple smoke, which was most gratifying and psychedelic (this was 1971). * More properly an adduct: NI3.NH3, apparently. My tutorial partner at university had made picric acid at school, which was the basis for a rather a good end of term prank. The school song would be sung, to piano accompaniment, and there was a bridging passage between the verses, employing one note that was not otherwise in the piece. So they painted that piano hammer with picric acid and when the moment came there was a satisfying BANG, accompanied by a cloud of dust, dead ladybirds etc., from the interior of the piano, followed by an eerie pause, before the pianist hesitantly took up the tune again.
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Hijack from Is there any way for the immune system to detect water molecules? Tessa Hansen Smith / LivingWaterless claims to be internally allergic to water molecules when they touch her internal organs and bloodstream.
On this forum, the names seem a bit different from the one I listed, viz. MeredithLesly, BlueSpike, Frank_Baker, LisaLiel.
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Peer review week
It's obviously possible, but how would the community have confidence in it? Furthermore the issue is not so much integrity, but quality control. There is plenty of poor science done in good faith, i.e. with integrity, but also little or no value. There are occasional scandals of bad faith or fraudulent science but the main job of peer review is to maintain quality, isn't it?
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how hard do you need to hit nitroglycerin to ignite it
About 4.
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Hijack from Is there any way for the immune system to detect water molecules? Tessa Hansen Smith / LivingWaterless claims to be internally allergic to water molecules when they touch her internal organs and bloodstream.
Yes it’s LisaL, Gaiagirl etc etc, back again. The funniest one from this person was the man allegedly strangled by his own thymus gland. And the various spontaneous combustion ones (Frank Baker et al). http://www.sciforums.com/threads/a-biologist-told-me-that-the-water-molecule-is-too-small-to-cause-an-immune-reaction-is-he-correct.165491/page-3#post-3703935
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How big is the Universe ?
This is unfolding just as I predicted. I hope everyone is enjoying their turn on the Theorist magic roundabout. He can keep it revolving almost indefinitely. I'm saving my remaining 50p coins for something else.
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Sweden Democrats
All modern neonazi movements (German, Austrian, Italian, Danish and now Swedish) are far-right, so far as I am aware. Normally, xenophobia is the bedrock of their appeal.
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Sweden Democrats
Well it's nice to have a right wing party that espouses democracy, I suppose. Though as it has neonazi roots, the proof of the pudding will be in the eating. For a long while, it seems the Scandinavian countries were largely insulated from immigration by their languages, and by their relative lack of a colonial past. But now for some reason they are getting their share, and seeing some disturbance to their traditional social cohesion. This is the reaction. A similar story is playing out in many countries.
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How big is the Universe ?
This poster is Theorist, or Pbob or countless sock puppets, back again to waste everybody’s time. He’s using the usual method: make a garbled sciency-sounding assertion to start the ball rolling, and then lob in further chunks on other topics at intervals, to keep respondents dancing and struggling to keep up with the deluge of errors and misconceptions. He has no interest in learning, so you are wasting your time. The sole object is to make the scientists dance and exploit their goodwill for his amusement.
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The Nuerological Reference Frame
Ah, Theorist, a.k.a. Pbob. 😁 I don't suppose you will be with us for long.
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how jesus came back to life, a scientific possibility
I think you are a deliberate waster of our time.
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If dark matter was observational how would we see the universe
In science, a hypothesis has value only if it can at least in principle be tested by an observation that could be made. Can you conceive of an observation that could test your hypothesis? If not, it probably isn’t scientific.
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Testing for an aether !
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If dark matter was observational how would we see the universe
Galaxies would be a lot brighter.
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Nuclear atom
You mean a neutron activation process in which the nucleus re-emits only a neutron, thereby returning to its former state, a bit like an atom absorbing and re-emitting a photon? I'd have thought there might be such a process, but I must admit I have not found any examples.
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Is it wise to freeze energy prices ?
I'm not sure how that idea can work. Fossil fuels, on which we will continue to have some need for decades, are by nature internationally traded commodities, exploitation and supply of which is controlled already by national governments. There's no way any nation can control the price of stuff they get from other countries, and no prospect at all of any global agreement among them all. Where I suppose you raise an interesting question is if, as we move progressively to renewables, those at least can be state-controlled, and if they were, would that be a good thing. My inclination is to think not. Experience seems to show the best route normally is to allow commercial enterprise a role but under a controlling framework set by government. That's what I think the current crisis has exposed in the UK: a free-for all in the electricity market may not be good for the country or - I was very interested to read - for the electricity producers, who are exposed to wild swings in profitability and can't formulate a robust business plan without building in massive risk premia - for which consumers, in the end, have to pay.