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Questions tagged [reference-request]

This tag is for questions looking for a single specific, or a small number of (citable) references.

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geometry of [Co(CN)₄]4-

This is a question that arises from the jee advanced 2024(india) exam. I am not sure whether the above complex exists.However it has been asked in the paper. in the exam we are supposed to use only ...
-2 votes
0 answers
91 views

Doubt in shape of [Co(CN)₄]4- compound? [duplicate]

I think the shape of [Co(CN)₄]4- should be square planar but am unable to find a reference from a reputed source on the internet?
1 vote
1 answer
66 views

Experimental determination of ring strain energy

For my thesis I am looking to expand a part of it to include experimental means of calculating ring strain, thus far I have calorimetry covering heats of combustion and hydrogenation as well as ...
-2 votes
0 answers
28 views

Reference for inorganic chemistry [duplicate]

I am a high school student preparing for the chemistry Olympiad . I have enough resources for problem solving but I do not have a proper theory book for inorganic chemistry as it is my weak part. I ...
0 votes
0 answers
32 views

What's the most up to date explanation for the stability of high multiplicity states?

"However, accurate quantum-mechanical calculations (starting in the 1970s)... singly occupied orbitals are less effectively screened or shielded from the nucleus, so that such orbitals contract ...
5 votes
7 answers
17k views

Resources for learning Chemistry

Based on various other Stack exchange site (Mandarin Chinese, Russian and German), we adapt this project here for chemistry, since it's a great idea to have all kinds of resources in one place. This ...
2 votes
1 answer
164 views

Effect of particle size on yield of copper acetylide

To avoid pure trial and error, I need some examples of experiments already done with (possibly ammoniacal) aqueous solutions, particles/precipitates of copper (both oxidation states) salts, and ...
13 votes
1 answer
523 views

What is the structure of trifluoromethanesulfonic acid in the gas phase?

During an interesting discussion in our group’s seminar, the question arose what actually causes trifluoroacetic acid to be a much better nucleophile than trifluoromethanesulfonic acid. Part of the ...
21 votes
1 answer
4k views

How can benzaldehyde have a pKa of 14.9?

There are numerous websites out there which claim that the pKa of benzaldehyde – C6H5CHO – is 14.90. (Just do a Google search for benzaldehyde pka to see what I ...
20 votes
2 answers
15k views

What is the least dense liquid under normal conditions?

What is the least dense liquid under normal conditions, room temperature, one atmosphere of pressure, doesn't combust upon contact with air, also wouldn't kill a human just for being in the same room ...
42 votes
4 answers
2k views

Do symmetric hydrogen bonds in neutral molecules exist?

As far as I know, there have only few truly symmetric hydrogen bonds been observed. Unquestionable is the existence of it in the bifluoride ion, $\ce{[F-H-F]-}$, see also here. There are a couple of ...
10 votes
3 answers
3k views

What is "super" in superphosphate?

This question is inspired from a previous question(marked unclear). I don't know the context of that question but I was intrigued by a statement: Superphosphate is used instead of just phosphate ...
7 votes
2 answers
2k views

What is the maximum number of water molecules that has been recorded till date to present as water of crystallization in a compound?

Context: I was casually looking through some old questions when I found this question. The OP wanted a compound that has all the hydrates ranging from monohydrate to decahydrate. I found chromium(III) ...
3 votes
1 answer
302 views

Electrical properties of glycol / water mixtures

I'm looking for a reference on electrical properties (specifically, conductivity) of mixtures of water / ethylene glycol. Specifically, I'm interested in How does the electrical conductivity of the ...
13 votes
1 answer
1k views

Does the largest known cycloalkane contain 288 carbon atoms?

If you Google "largest known cycloalkane", you will find this: The above result came from a random HW-QnA site. From where does the result come from? Similar posts: Largest alkane having a ...
9 votes
6 answers
8k views

Is there a database on chemical reactions, similar to NIST, but far more complete?

The only thing I'm interested in is to be able to search all reactions involving that compound in the database. Equilibrium constant, reaction rate and energy of activation would all be very welcome, ...
7 votes
2 answers
9k views

What is the Ksp of Al(OH)3?

Top hits on google are: This site Aluminum hydroxide $\ce{Al(OH)_3}$ >> $ 1.3×10^{–33}$ and This site Aluminum hydroxide $\ce{Al(OH)_3}$ >> $ 3×10^{–34}$ which is different by a ...
10 votes
3 answers
1k views

Research-backed articles on cast iron seasoning

I've always seasoned my cast iron pans with vegetable oil because that was what I was taught. I'd done some research before, and even came across this StackExchange post on asking the best oil for the ...
0 votes
0 answers
55 views

Temperature-dependent pressure equilibrium constant of the heterogeneous water-gas shift reaction

In the course of my research, it became necessary to perform thermodynamic calculations involving chemical reactions. One of the chemical reactions is the heterogeneous water-gas shift reaction $$\ce{...
6 votes
0 answers
157 views

Which xylenes, if any, are immiscible with DMSO?

"Xylene" is reported to be immiscible with dimethyl sulfoxide (DMSO), according to a few solvent miscibility tables found online (chart 1, chart 2, chart 3). I have tried to locate some ...
2 votes
3 answers
226 views

Will gamma radiation cause "thermal" decomposition of sodium bicarbonate?

I am conducting research for a new drug that contains powdered sodium bicarbonate, and the drug will need to be sterilized after placement into it's container/closure system. Typically, this is ...
6 votes
2 answers
8k views

Reaction of borax with NaOH

How does borax react with NaOH? My textbook says that sodium peroxoborate is formed. I couldn't find the reaction anywhere else. Can anyone verify as well as explain it?
-2 votes
1 answer
6k views

Molecular structure of all periodic table element molecules exceptional cases etc [closed]

I am searching about some basics in chemistry. I was looking for the molecular structure of all periodic table element molecules. eg: Hydrogen molecule: as $\ce{H2}$; structure: I was able to find out ...
7 votes
2 answers
901 views

Does high pressure reverse reaction between zinc and sulfuric acid?

When zinc is added to sulfuric acid, it undergoes a chemical reaction that generates hydrogen gas and zinc sulfate. Can this reaction be reversed by applying pressure to the products converting them ...
7 votes
1 answer
1k views

What is the chemical composition of Ferrous Ferrocyanide?

To this day, iron-cyanide complexes confuses me. So, I want to settle this once and for all. After scavenging the internet, I gathered the following result: $$ \ce{Ferr} \color{blue}{\ce{ous}}~\ce{...
5 votes
1 answer
257 views

Has tellurium(II) iodide been properly characterized ever?

According to Wikipedia, tellurium tetraiodide decomposes on heating: $$\ce{TeI4 ->[\Delta] TeI2 + I2}$$ However, the reaction is somewhat wrong as according to this 2008 paper: Solid tellurium ...
0 votes
1 answer
48 views

How can I find references related to pH for water solutions of salts [closed]

I have searched the web pretty much all day because I want to work out what the pH will be of various salts when they are in water solution. I have searched for references related to pKa and pH, but I ...
-2 votes
1 answer
55 views

Aluminum nitride hydrolysis [closed]

I wanted to ask some reference about aluminum nitride hydrolysis in water. Specifically I would like to know if there is the formation of radicals or of some other reactive species.
-2 votes
1 answer
194 views

Looking For Resources on Separating Iron, Silicon Dioxide, and Sodium Chloride [closed]

I am working on an experiment and lab report for my high school chemistry course where I am given a vial with a mixture of Ferrum, silicon dioxide, and sodium chloride. I need to figure out how to ...
0 votes
0 answers
92 views

Database of atomic crystal structure data or images of rocks and minerals?

I am looking for crystal structure images so I can redraw them in a nice form. However, I don't seem to find much searching Google. Perhaps this is a slightly better example (searching for Quartz ...
5 votes
1 answer
772 views

Meaning of equivalents in organic synthesis

The use of "equivalents" as used in titrations/chemical analysis is an obsolete concept except in some countries. The original meaning of equivalent weights is the weight of a compound that ...
5 votes
0 answers
166 views

Does chromium(III) oxide react with or dissolve in liquid sulfur dioxide?

Liquid $\ce{SO2}$ (b.p. −10 °C) is known as a versatile solvent (yet not particularly pleasant to work with) for a wide range of organic and inorganic compounds having limited solubility in ...
0 votes
0 answers
46 views

Searching for evidence-based published study that compares disinfectant residues after evaporation

I've been plowing through databases to find evidence-based research reporting on the residue remaining after evaporation of chemical disinfectants. I want to know if there is a study which states the ...
11 votes
2 answers
9k views

Density range of table salt?

Does anyone have a reference for the density range of common table salt $(\ce{NaCl})?$ A pure $\ce{NaCl}$ crystal has a density of $\pu{2.16 g/cm^3}.$ However, the salt granules in table salt don't ...
0 votes
1 answer
133 views

What does the word "dynamics" mean in the context of proteins or biomolecules in general?

What does it mean by “dynamics” when we say “dynamics of protein” or “dynamics of biomolecules”? For instance, McCammon's paper has the title "Protein Dynamics" [1]. What does the word “...
0 votes
0 answers
273 views

IR spectra database for inorganic compounds

I would need a database of IR spectra of inorganic compounds, possibly free of charge. For organic compounds there is for example "AIST: Spectral Database for Organic Compounds, SDBS" (https:...
0 votes
2 answers
296 views

Can anisole be nitrated only with nitric acid?

Is it possible to nitrate anisole using only concentrated nitric acid? Or is it necessary to use sulfuric acid or acetic anhydride? Could you please help me with some references?
3 votes
1 answer
92 views

How does coenzyme A produce proton from pyruvate ions?

Coenzyme A (CoA) is a complex molecule consisting of mercaptamine, β-alanine, pantoic acid, diphosphate, pentose, phosphate and adenine moieties: Which part of it actually plays role in the formation ...
2 votes
1 answer
81 views

Mathematical models of Vaporization-Condensation dynamics

I am a mathematician now studying an introductory chemistry course. Consider a liquid in a closed container, at (say) room temperature. Then some of the liquid will vaporize. Then some of the ...
1 vote
1 answer
86 views

Thermal oxidation of gold(I) sulfide

As far as I know the chemistry of $\ce{Ag}$ and $\ce{Au}$ are almost the same; because $\ce{Ag}$ belongs to the 4d series and $\ce{Au}$ belongs to the 5d series, we know the size of 4d and 5d are ...
7 votes
2 answers
7k views

Bond angles of dichlorine and dibromine monoxides

Most online sources suggest that the bond angle of $\ce{OBr2}$ is greater than the one of $\ce{OCl2}.$ It is explained by the electronegativity difference and electron repulsion within the VSEPR ...
4 votes
2 answers
560 views

What solvent dissolves calcium nitrate but not ammonium nitrate?

I am experimenting with a precipitation reaction between ammonium sulfate solution and calcium nitrate. Calcium sulfate precipitates and can be filtered out easily. I am wondering if there's a way I ...
1 vote
1 answer
136 views

Can all 20 H atoms of pentagonal dodecahedrane be substituted with high yield and a wide range of substituents? What limits full substitution?

I first came across dodecahedrane in comments below What dodecahedral molecule is Linus Pauling likely holding in this photograph? Does it have 40 carbon atoms? Wikipedia's Dodecahedrane; Derivatives; ...
4 votes
1 answer
673 views

Ellingham diagram/graph for tungsten

I've recently come across one of the methods to form tungsten carbide($\ce{WC}$) from wolframite ($\ce{(Fe,Mn)WO4}$) by using carbothermic reduction which was supposedly one of the first methods for ...
1 vote
0 answers
108 views

Feynman books analogous in chemistry [closed]

Is there a analogous to feynman lectures in physics but for chemistry? Like a book ir series of books that covers all the basics?
3 votes
1 answer
226 views

Production of ʟ-glucose

What chain(s) of reactions are used to produce ʟ-glucose? I did a search on Google Scholar, but to my surprise nothing came up. My guess would be that the synthesis starts from ᴅ-glucose for which ...
-1 votes
1 answer
486 views

Reliable data describing acidity of 2,4,6-trinitrobenzenesulfonic acid

I wonder what is the $\mathrm{p}K_\mathrm{a}$ or the value of Hammett's $H_0$ function of 2,4,6-trinitrobenzenesulfonic acid? PubChem gives $\mathrm{p}K_\mathrm{a} = 0.13,$ but doesn't specify the ...
13 votes
1 answer
349 views

Newer ionic radii data than Shannon's 1976 compilation?

Shannon, R. D., 1976, Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides: Acta Crystallographica Section A, v. 32, p. 751–767. DOI: 10.1107/...
7 votes
1 answer
422 views

Caffeine molecule representation and orientation

Almost all the representations of the caffeine molecule that I've come across have the two rings drawn next to each other on the horizontal axis. Any particular reason for this? Would it be sacrilege ...
10 votes
5 answers
2k views

How can I calculate the charge distribution of a water molecule?

I would like to obtain the 3D charge density of a water molecule for plotting purposes (i.e. not necessarily super-accurate). I know this is a tough problem, but I'd like to give it a try. Since I'm ...

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