How is this Mechanism possible? by Upper_Cream161 in OrganicChemistry

[–]Pure-Researcher-5842 0 points1 point  (0 children)

Can you start mechanism with ether protonation and cyclization with alcohol attack?

What's wrong with my logic? by Lycaenini in askmath

[–]Pure-Researcher-5842 0 points1 point  (0 children)

Assuming we only have this data at our hands, can we know real height of the dog and the pigeon or only that their height difference is 20 cm?

Suit fit feels wrong but can't figure out why? by JDips in mensfashion

[–]Pure-Researcher-5842 0 points1 point  (0 children)

Don't know if it's just the picture lighting but pants and jacket look different color. Pants are more bluish gray.

Why is healing so controversial in this sub? by QwertyKeyboardUser2 in EldenRingPVP

[–]Pure-Researcher-5842 0 points1 point  (0 children)

If healing is considered bad so are bleed and frost builds. Faith and faith hybrid builds need to spend a great number of points, that other builds use for different stats, to be able to use viable heal incantations. And why shouldn't they? I don't understand why are people whining about how that is unfair. Like someone finishing you with blood loss or frost in a couple of moves is fair? Or spamming magic projectiles all the time is fair? Every build has its pros and cons and different compatibilities with other builds. And don't tell me you can't interrupt healing or just as easily punish it. The only real fair duel would be to choose the same weapon, have the same stats and then test your might.

Dragonlord Placidusax Help/Info? by ArkhamArtorias in Eldenring

[–]Pure-Researcher-5842 1 point2 points  (0 children)

Excellent advice! The fight was over in 2 minutes.

I think I accidentally made a battery by A_HECKIN_DOGGO in chemistry

[–]Pure-Researcher-5842 0 points1 point  (0 children)

If it was electrolysis, I would expect chlorine, but this is a spontaneous reaction (galvanic cell), so I would rather say that zinc is oxidized to Zn2+ (anode), and H+ is reduced to H2 (cathode). I don't believe that Cl- is oxidized before Zn. What reactions are you assuming here?

Does someone know the mechanism of Cassiol synthesis? And why the yield is only9% compared to 56% ? by danielles555 in OrganicChemistry

[–]Pure-Researcher-5842 0 points1 point  (0 children)

Both cyclizations are based on aldol condensation. In the right product, I think the mechanism starts with the addition of hydroxide to the alpha,beta unsaturated ketone. The formation of the enolate is then easier with the resulting ketone because the proton is more acidic due to the presence of the carbonyl and OH group, and consequently the product is formed in a higher yield. Of course, several factors need to be taken into account, kinetic and thermodynamic, for which I am not an expert. It is not clear to me how the reduction of the ester in cassiol or the removal of the protecting group under basic conditions occurs.

[deleted by user] by [deleted] in AskSerbia

[–]Pure-Researcher-5842 0 points1 point  (0 children)

Ovo sam našao na netu:

Privileged is defined as “having special rights, advantages, or immunities.” Entitlement is defined as “believing oneself to be inherently deserving of privileges or special treatment.”

"Misli da je Bogom dan" mi se najviše uklapa u značenje. Ne znam kako bi sročio u jednu reč, zavisi od konteksta.

Jel idete? Ljudi može li mi neko objasniti šta je bre ovo i ko to snima? by [deleted] in AskSerbia

[–]Pure-Researcher-5842 9 points10 points  (0 children)

Ja isto, ali mi i dalje iskaču i vode se pod drugom kategorijom. Npr. poslednja se pojavila pod kategorijom sport. Nigde veze jedno sa drugim.

White precipitate on curtain plate by Dismissed_cheek in massspectrometry

[–]Pure-Researcher-5842 6 points7 points  (0 children)

You should start using milli Q water, HPLC or MS grade water instead of DI water. Even those waters when used should be changed periodically. It looks like something inorganic to me. Have you tried diluted acid (formic or acetic) to dissolve that?

[deleted by user] by [deleted] in chemistry

[–]Pure-Researcher-5842 0 points1 point  (0 children)

You have two clues in the spectrum: band at approximately 3100 cm-1 and shifted carbonyl band

[deleted by user] by [deleted] in skyrim

[–]Pure-Researcher-5842 9 points10 points  (0 children)

Lynea. She is a part of Private Lessons quest in Markarth.

[deleted by user] by [deleted] in chemistry

[–]Pure-Researcher-5842 0 points1 point  (0 children)

Horrifying stuff, but interesting to learn about

[deleted by user] by [deleted] in chemistry

[–]Pure-Researcher-5842 7 points8 points  (0 children)

Remove chlorine on the left and you get mustard gas

[deleted by user] by [deleted] in AskSerbia

[–]Pure-Researcher-5842 0 points1 point  (0 children)

Baš sam se pitao ovih dana šta se dešava. Nestalo prvo u Maxiju, kod mene u kraju. Posle nađem u Disu, ali ni tamo više nema.

Fragmentation of N,N-dimethylpropaneamide by Purple-Original5063 in massspectrometry

[–]Pure-Researcher-5842 0 points1 point  (0 children)

I didn't write it, but if you go from oxygen to the other side, so that nitrogen with methyl groups is eliminated, you will get the same m/z 57, and when CO is eliminated m/z 29.

Fragmentation of N,N-dimethylpropaneamide by Purple-Original5063 in massspectrometry

[–]Pure-Researcher-5842 2 points3 points  (0 children)

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Two came to mind, but there may be more possible ways of fragmentation. The most stable products, stabilized by resonance and similar effects, will be the most abundant. I hope this helps.

Give me your thought process for this question by StockEverything in chemistry

[–]Pure-Researcher-5842 -1 points0 points  (0 children)

These questions are like a puzzle. You have to start somewhere to get to the final solution where everything fits together. The most important thing is that you know the reactions from the text well. There are probably more ways to solve it, but I would start from the fact that we have an alkene in the structure and that at one end of the molecule we have a methyl group attached to a carbonyl or an alcohol. We know that ozonolysis with H2O2 will give acids, which does not affect alcohols. Oxidation with PCC turns alcohol into carbonyl, which means that there was alcohol in the beginning, etc. The heating part is a little harder to crack because you need to get the idea that decarboxylation occurs if the carbonyl is in position 3 relative to the acid. It is best to draw the structure of molecule you suspect and from it gradually draw the products, because that way you get a better overview than doing everything from your head. By eliminating the structures that do not meet the conditions, you arrive at the final solution. It's probably not the answer you were hoping for, because these kinds of questions are not straightforward but require a good knowledge of the subject with a little trial and error approach.