Questions tagged [reference-request]
This tag is for questions looking for a single specific, or a small number of (citable) references.
400
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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 ...
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1
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0
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187
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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'...
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6
votes
1
answer
911
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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 ...
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1
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0
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55
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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) ...
- 11
1
vote
0
answers
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“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 ...
- 283
2
votes
0
answers
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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 ...
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0
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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} \...
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2
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168
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"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 ...
- 121
1
vote
2
answers
59
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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 ...
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1
answer
167
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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:
$$ [\...
- 187
1
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0
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129
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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 ...
- 119
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votes
1
answer
2k
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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 ...
- 6,112
2
votes
0
answers
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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 ...
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votes
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What is "activated red phosphorus"?
[WP = white phosphorus ; RP = red phosphorus ; ARP = activated red phosphorus]
A YT channel, Extraction & Ire has a video from two years ago (2018) on converting WP to RP by keeping the former in ...
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4
votes
1
answer
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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 ...
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6
votes
0
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286
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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 ...
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2
votes
0
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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?
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1
answer
877
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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?
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5
votes
1
answer
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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.
...
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2
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1
answer
642
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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 ...
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2
answers
6k
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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 ...
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4
votes
1
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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 '...
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4
votes
2
answers
367
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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 ...
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11
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2
answers
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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 ...
3
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0
answers
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Does mercury(II) cyanate exist?
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 ...
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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
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0
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41
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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 ...
- 254
2
votes
0
answers
108
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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 ...
- 31
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1
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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?
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1
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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, ...
- 371
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votes
1
answer
59
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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 ...
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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 ...
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6
votes
1
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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 ...
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3
votes
1
answer
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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 $(\ce{SiO2},$ $\...
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1
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0
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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 ...
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0
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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 ...
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0
answers
51
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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 ...
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424
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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.?
1
vote
1
answer
141
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Synthesis of the tetrachloroaluminate(III) anion
Looking for random chemicals, I found a reference on the anion and thought that it could be synthesised from common laboratory reagents:
$$
\begin{align}
\ce{2 Al + 2 NaOH + 2 H2O &-> 2 NaAlO2 ...
6
votes
3
answers
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Radius of hydride (H⁻) ion
What is the radius of the hydride $(\ce{H-})$ ion? There are several sources with conflicting reports on the same.
Inorganic Chemistry: Principles of structure and Reactivity cites Pauling’s 1960 ...
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1
vote
2
answers
840
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How can iodine oxidise hydrogen peroxide?
The following is mentioned in NCERT (government textbook in India used in all schools) under chemical properties of $\ce{H2O2}:$
(iv) Reducing action in basic medium
$$\ce{I2 + H2O2 + 2 OH- -> 2 I-...
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answer
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Is electron density a good measure of similarity between molecules?
I am looking for a good similarity measure between molecules in order to use it with machine learning algorithms. I found a paper, Carbó, R., Leyda, L. and Arnau, M. (1980), How similar is a molecule ...
3
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0
answers
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Is there a standardized way to assign a label to the symbol of a chemical element (in a published work)?
When referring to a particular atom, both in text and when using a graphical representation, several conventions are being applied.
In the field of crystallography an arabic numeral either follows ...
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4
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1
answer
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How to recover C18 column after prolonged exposure to phosphate buffer?
A colleague of mine who occasionally does HPLC in a biochemistry lab discovered that a C18 column was not properly flushed after the previous experiment.
It appears that the column was stored for ...
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3
votes
2
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501
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Reference request on potassium cyanide production method
I kindly ask for a reference for the following claim about potassium cyanide, found at potassium.atomistry.com:
It is also obtained by the action of a mixture of steam and nitrogen on potassium ...
- 1,470
3
votes
1
answer
173
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Is there a "Comprehensive Solid State" book?
We have Comprehensive Coordination Chemistry, Comprehensive Organometallics, Comprehensive Organic Synthesis and probably few other similar works that aim to do a wide review of recent works at the ...
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0
votes
1
answer
168
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Typical reaction yield for combustion of hydrogen [closed]
I am writing an essay on the chemistry of rocket fuel, and I was wondering what, if any, would be a commonly accepted value for the actual yield of the reaction between hydrogen, $\ce{H2},$ and oxygen,...
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vote
0
answers
853
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Literature value for the activation energy of the reaction between hydrochloric acid and sodium bicarbonate
Does anybody have the literature value for the activation energy of the reaction between hydrochloric acid and sodium bicarbonate? If yes, could you please cite the source for it and the value?
I ...
1
vote
0
answers
136
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Thermochemical data for thiocyanatoiron(III) ion
I am currently writing a lab report about the formation constant of $\ce{FeSCN^2+}.$ All I could find online was a formation constant at $\pu{25 °C}$ $(890),$ which was 70% higher than the ...
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2
votes
1
answer
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Reference request on formate potash process
Wikipedia article on Potassium Formate mentions a so-called "formate potash process" for production of potassium, presumably referring to elemental metal.
Concise encyclopedia chemistry by Mary ...
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