Questions tagged [reference-request]
This tag is for questions looking for a single specific, or a small number of (citable) references.
362
questions
5
votes
1answer
85 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
2answers
101 views
Reactivity of group 13 elements with nitrogen
Do all group 13 elements react with nitrogen to form nitrides of form $\ce{MN}?$
J.D. Lee's Inorganic chemistry book mentions the following:
Aluminium burns in dinitrogen at high temperatures ...
0
votes
0answers
32 views
What does solid matrix mean?
I am reading "Effect of Freeze-Drying on Quality and Grinding
Process of Food Produce": A Review by Timilehin Martins Oyinloye and Won Byong Yoon.
The problem is they are referring to the ...
3
votes
1answer
36 views
Fluorescence quenching by palladium(II) vs. platinum(II) complexes
Why do we observe much stronger (in most cases complete) fluorescence quenching by $\ce{Pd^2+}$ than $\ce{Pt^2+}?$ I work with complexes of both metals and there is no real 100% explanation I can find ...
0
votes
0answers
69 views
Examples for oscillatory behaviour in the human body [closed]
I'm looking for examples in the human body which show periodicity, more precisely, I'm looking for examples of oscillating reactions that occur in the human body which can be modelled using the ...
1
vote
0answers
33 views
Molar conductivity of a strong electrolyte
In 1910, Kohlrausch showed that the dependence of the molar conductivity of strong electrolytes is well described by the following equation:
$$\Lambda_m = \Lambda_m^\circ-K\sqrt{c}$$
This equation, ...
2
votes
0answers
18 views
Chemical safety information: Where to look to find out how poisonous poisons are?
Could someone point me toward a primer on how to read the toxicity warnings on standard chemical data sheets? Or alternatively, where one should look for more precise information than is contained on ...
1
vote
0answers
29 views
Free on-line dissociation constants
Is there a decent on-line source for dissociation constants for acids and bases as CRC alternative?
This chemistry stackexchange old answer no longer has valid links:
Is there an online database of ...
1
vote
1answer
59 views
What are the currently most accurate sources for lists of the values for elemental properties
I have a hopefully simple question. I am a tutor working with a student that wants to know where to find the most recent accurate measurements for elemental properties. He's only in Chemistry I, so he'...
1
vote
1answer
44 views
Properties of inconel [closed]
I am doing a project on the physics of the spaceX raptor engine. I believe it is made out of a certain type of inconel alloy. I want to understand why this alloy has the properties that it does, but I ...
0
votes
0answers
23 views
Where can I find literature values for standard molar enthalpies of neutralization?
I'm looking for enthalpy of neutralization literature values for inorganic weak acids. NIST, PubChem, etc. don't list them. Is there somewhere else I should look?
-1
votes
1answer
57 views
What is the electron configuration of platinum? [closed]
Some textbooks write the electron configuration for platinum (Pt) as $\ce{[Xe] 4f^14 5d^9 6s^1}$. However, some also write it as $\ce{[Xe] 4f^14 5d^8 6s^2}$. Which is correct?
I hope someone can help ...
1
vote
0answers
24 views
Molar conductivities of aqueous electrolytes at 1 M
In the following table from the CRC Handbook, molar conductivities of aqueous electrolytes are given for concentrations from infinite dilution to 0.1 M. However, I am looking for values at 1 M, and I'...
6
votes
1answer
195 views
Exact meaning of “degree of crosslinking” in polymer chemistry
In the ion-exchange chromatography literature, a term "degree of crosslinking" appears frequently. Ion exchange resins are typically made from divinylbenzene and styrene. One of the stated ...
1
vote
0answers
39 views
Concentration of sulfur in turbid solution
I recently participated in an experiment where I need to calculated the reaction orders and the reaction constant of the reaction:
$$\ce{8 Na2S2O3(aq) + 16 HCl(aq) -> S8(s) + 8 SO2(g) + 16 NaCl(aq) ...
1
vote
0answers
31 views
“Good” properties of transparent conducting oxides
I'm a computer scientist and I'm trying to figure out which are the key properties that define a “good” acting transparent conducting oxide (TCO) in order to consider several possible features to ...
2
votes
0answers
29 views
Is there a better coordinate framework and symmetry operator for constructing molecular orbitals of molecules with higher-order geometry?
The following excerpt is taken from [1] (with a few rewording, emphasizes are mine).
In an attempt to construct molecular orbital (MO) of any molecule, one needs to determine the symmetries of ...
1
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0answers
22 views
Reference for molecular orbital theory [duplicate]
I am studying electron collision with molecules, and came across with notation like this $\left(\mathrm{B}^{1} \Sigma_{u}^{+}, \mathrm{c}^{3} \Pi_{u}, \mathrm{a}^{3} \Sigma_{g}^{+}, \mathrm{C}^{1} \...
1
vote
2answers
158 views
“Encyclopedic” / semi-exhaustive reference work on Chemistry [closed]
I'm buying my brother a present—It's the holiday season after all. He's about to start his academic career in chemistry. I would like to give him a book on chemistry, but not something that is ...
1
vote
2answers
41 views
Thermal properties of aluminium alloy 6063 [closed]
I am looking for the operating temperature range both in a cold and hot environments (minimum and maximum operating temperatures) for aluminium alloy 6063.
I'm new to finding this kind of information ...
0
votes
1answer
44 views
How does the Hammett acidity function work and how to calculate it for [H2SO4] = 1,830? Any references?
I'm modelling the concentrations in the Belousov Zhabotinsky reaction. For this model, I need to convert [BrO3-] to [HBrO3]. I discovered in several papers that the following correlation applies:
$$ [\...
1
vote
0answers
61 views
Questions About an Appropriate Textbook on Electrochemistry for Self-Study
Apologies if this is a somewhat frequent request (I promise I did scour various sources before posting, but none quite applied to me), but I was hoping for some insight from the community regarding an ...
2
votes
1answer
189 views
Reference Request - bond lengths in PCl2F3
While writing an answer here, I needed references for bond lengths of $\ce{PF3Cl2}$ and $\ce{PF4Cl}$. The latter was easily found in reference (1), whereas I could not find exact references for bond ...
1
vote
0answers
29 views
Industry Standards of Polymer Leeching Measurement [closed]
I am a research assistant currently researching the leaching of polymers the byproducts of the reaction of ethanol and wood coating from wood billets into water and I'm at a crossroads with my ...
1
vote
0answers
81 views
What is “activated red phosphorus”? What made it so long to be discovered?
[WP = white phosphorus ; RP = red phosphorus ; ARP = activated red phosphorus]
Tom from Extraction & Ire did a video two years ago(2018) on converting WP to RP by keeping the former in sunlight ...
3
votes
1answer
475 views
Wittig reaction in presence of carboxylic acids
The following reaction came in a recent test:
According to this reaction, the acidic hydrogen would protonate the ylide, and the standard wittig reaction would not take place. This source agrees with ...
5
votes
0answers
133 views
Geometry of a free radical at the bridgehead carbon
With reference to J. Am. Chem. Soc. 1968, 90 (19), 5266–5267, they state:
The most favorable geometry of aliphatic free radicals remains an unsolved problem, since existing data are consistent with a ...
3
votes
0answers
74 views
Which amino acids can be totally synthesized? [closed]
I can't find information regarding which amino acids (say the proteinogenic ones or in general) can be totally synthesized. Is there a reference?
0
votes
1answer
156 views
Who came up with C1V1 = C2V2? [closed]
I was wondering if there is an original scientific publication showing why $C_1V_1 = C_2V_2$ works.
Or perhaps, who described/used it first?
5
votes
1answer
409 views
Covalent atomic radii: oxygen vs nitrogen
Many books state that $R_\ce{N} > R_\ce{O}$ which is in accordance with the general trend. However, some books say that $R_\ce{O} > R_\ce{N}$ because of repulsion caused by pairing of electrons.
...
1
vote
1answer
115 views
Book Recommendation for Molecular Orbital Theory [duplicate]
I posting my question here since I have seen similar questions but I haven't found the specific answer I am searching for. I am seeking textbook recommendations on Molecular Orbital Theory with ...
7
votes
1answer
1k 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 ...
3
votes
1answer
231 views
Electrophilic Substitution with Ceric Ammonium Nitrate and Lithium Bromide as reagents
The 2020 IChO Preparatory Problem List (source here) had the following reaction as part of the solution to the first question:
(CAN = Ceric Ammonium Nitrate).
What is the mechanism for this '...
4
votes
2answers
81 views
Is there a standard scholarly reference for lattice constants of crystals of the elements?
I need to discuss the lattice constants of bulk crystals of several metal and semiconductor elements. I can find plenty of tables and numbers that are probably "close enough" but for a paper ...
10
votes
2answers
204 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
0answers
49 views
Has mercury(II) cyanate ever isolated as a free compound?
Recently, I have answered a question "Comparing explosive properties of mercury(II) cyanate and mercury(II) fulminate" where stability of cyanate vs fulminate was discussed. While I was ...
-5
votes
1answer
49 views
Molecular Structure
What's the meaning of the triangle and striped line in this structure of $\ce{H3O+}$:
Can someone suggest me a site to learn about this?
(I'm quite a novice in chemistry.)
Thanks
1
vote
0answers
39 views
Photoluminescence Spectra of Solids
What information can we gain with the photoluminescence spectra of solids? The bandgap can be determined for example, but are there any other useful properties we can learn? I care about this in the ...
2
votes
0answers
85 views
Equilibrium Constants for Diatomic Gases at High Temperatures
I'm new here and I haven't taken chemistry beyond high school, so please forgive the ignorance. I am reading a book about hypersonic aerodynamics, and I am trying to connect some chemistry knowledge ...
2
votes
0answers
222 views
What is the correct formula for iodonium ion?
Previously, I have made a comment on user @Maurice's response to a question where he enquired about the existence of $\ce{I3+}$. I cited a paper1 which said that $\ce{I3+}$ is (apparently?) called ...
0
votes
1answer
54 views
What is the density of sodium trimethylsilylpropanesulfonate (DSS)?
I tried to look for the density of sodium trimethylsilylpropanesulfonate (DSS) online but could not find anything. Perhaps someone here measured it/knows where it may be found?
1
vote
1answer
126 views
Fundamentals of mathematics and physics for physical chemistry [closed]
Before I start studying chemistry, I want to gain some knowledge about the fundamentals of mathematics and physics that are important to better understand the principles of physical chemistry, ...
0
votes
1answer
49 views
How to properly model a mechanochemical reaction of barium titanate and copper(II) complexes?
I would like to understand, in terms of chemical kinetics, how I could equate the reaction rate between $\ce{BaTiO3}$ and copper(II) complexes under ultrasound effect.
Examples in literature would be ...
3
votes
0answers
40 views
How does one calculate the electronic difference density in practice?
I am interested in calculating electronic difference density maps. These have been described for quite a long time by Bader and others. For example, below is the fourth of a series of papers which ...
6
votes
1answer
108 views
What is “dithreitol”?
The article by Hu et al. [1] mentions a compound "dithreitol" in the Saliva Proteome Analysis section (emphasis mine):
For the "shotgun" approach, saliva samples (1 mL) were pre-fractionated with ...
3
votes
1answer
90 views
Is there a list of must-have columns for LC-MS/MS used in biochemistry/clinical lab setting?
Considering a wide variety of chromatographic columns used for (U)HPLC based on
phase type (normal or reverse);
column dimensions (geometry, length, inner diameter);
particle material $(\ce{SiO2},$ $\...
1
vote
0answers
38 views
What is the activation energy of a Daniell cell?
I'm having trouble finding a posted literature value for the activation energy for the Daniell cell redox reaction:
$$\ce{Cu^2+ + Zn -> Cu + Zn^2+}$$
Where might I be able to find this ...
4
votes
0answers
66 views
Calculating the energy of a molecule using probability distributions
I wish to calculate the energy for a protein where the position of all the C-alpha atoms is known.
One way is to calculate the pairwise distances between the atoms and then look up a probability ...
0
votes
0answers
39 views
Reference for Hammett acidities of dilute H2SO4?
When $\ce{H2SO4}$ is dissolved in water in little amounts ($<\pu{1M}$), the $\mathrm{pH}$ scale can be used to measure the acidity of the solution. However, in larger concentrations, this breaks ...
0
votes
1answer
98 views
Polymers which are miscible in oil
Can someone suggest me a list of polymers or some paper where I may find polymers that are soluble in oils like silicon oil, mustard oil, coconut oil, bean oil or petroleum ether, etc.?
