New answers tagged organic-chemistry
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Identifying optically active alcohols
1 equivalent of Grignard reagent reacts with esters to form a ketone, by a nucleophilic substitution mechanism. In this case, $\ce{Ph-}$ will replace the alkoxy group to form methyl phenyl ketone from ...
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Isopropyl Alcohol Vs Acetone for Dissolving Organic Contaminants on PCB
Any components on the PCB need to be considered and as such, isopropyl alcohol is the better option here. It's an effective cleaner and less likely to damage plastics and coatings on the board. In ...
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4
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Why is the Molar mass of CO2 different than the weight of the sum of its particles?
This is a really interesting question actually! I'm new to answering questions on this site but I'll explain as best I can.
As others have said, the difference in this particular calculation comes ...
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(Di)chlorination of phosphonic acid ester
I was able to solve the formation problem. The dichloride can be formed reliably even for an acid sensitive R, when an overproportional amount of pyridine is present. On mixing, the pyridine should ...
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2
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Phenol reaction with nitration mixture
Yes, that's correct. Benzoquinone is one of the byproducts of
nitration reaction and it occurs from oxidation.
During the preparation of nitrophenols, by-products of oxidation, in particular ...
- 26.3k
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Why can't ethyne form hydrogen bonds in water?
According to a matrix isolation study by Engdahl and Nelander,$^1$ acetylene/ethyne does form a hydrogen bond with water. They deposited mixtures of HCCH/DCCD/HCCD and $\ce{H2O}$/$\ce{D2O}$ in solid ...
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8
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What type of interaction in a π-complex?
Different communities differ in how to represent complexes, for instance with $\pi$ nucleophiles as Lewis base, and electron density between atoms (see an earlier thread here). To count for each line ...
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Reaction of 1,3-butadiene with HBr in the presence of peroxides
The reaction of 1,3-butadiene (1) with HBr/peroxide (ascaridole, 5) in the absence of solvent was investigated by Kharasch[1] in 1936. With a reaction time of 2 hours at -78o, the kinetic bromide 3 ...
- 17.2k
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Synthesis of racemic nicotine
I got the answer key. Problem is, I didn't think it would be possible to hydrogenate the ketone functionality to the alcohol using Pd/C. Never seen it. Rest makes sense, SN1 reaction for the iodine ...
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Synthesis of racemic nicotine
You are correct about the Claisen condensation and the decarboxylation. You can't solve the synthesis as shown because there are too many steps. Ethyl nicotinate (1) and the lactam 2 condense to form ...
- 17.2k
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Synthesis of racemic nicotine
It seems you are in right track. I also wasn't sure why that last two steps are necessary. I have filled the necessary structures of your scheme since you have shown your understanding of the ...
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Salicylic acid - polarity and solubility
Salicylic acid has just the right arrangement of two OH groups to do intramolecular hydrogen bonding. The ability to do hydrogen bonding usually makes a molecule MORE polar, but intramolecular ...
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Stability of hemiaminals
Hemiaminals compounds with NH2 and OH groups attached to the same carbon atom are usually not stable, because they often dehydrate to produce imines, which then polymerise to produce ...
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Does ABS contain natural rubber
As rightly pointed out by Maurice, regular ABS plastic itself doesn't contain natural rubber or natural latex. ABS is a completely synthetic material made from combining three different monomers: ...
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Does ABS contain natural rubber
Natural rubber is made of polymerized isoprene plus sulfur. ABS does not contain isoprene or its polymer.
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Will methyl group donates its electron density to only carbon atoms and not to other heteroatoms ?? Why this is so?
The methyl group can and does donate electrons through hyperconjugation to hetetoatoms. Donation to nitogen is suggested by comparing the $\pu{pK_b}$ of methylamine(4.19) with that of ammonia(4.75). ...
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