Questions tagged [reference-request]
This tag is for questions looking for a single specific, or a small number of (citable) references.
300
questions
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0answers
31 views
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 ...
2
votes
1answer
34 views
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 ...
3
votes
1answer
115 views
Energy cost of C−N rotation in hydroxamate group
I am looking for a literature reference on the energetic cost of C−N rotation in hydroxamate group such in LC5 in water. I have been googling for a while.
10
votes
1answer
934 views
Does sulfoxide H₂SO exist?
The question Does H2SO or H2CO have a higher dipole moment? left me wondering whether $\ce{H2SO}$ has already been synthesized.
There are experimental evidences that both hydrogen thioperoxide $\ce{...
1
vote
1answer
48 views
Can oxygen gas in air react with Mn3O4 to form MnO2?
I think $\ce{MnO2}$ at high temperature can be used as a catalyst for $\ce{SO2 + O2 -> SO3}$:
$$
\begin{align}
\ce{MnO2 + SO2 &-> MnSO4}\tag{1}\\
\ce{3 MnSO4 &-> Mn3O4 + SO2 + 2 SO3}\...
1
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0answers
29 views
Explanation for the reaction of gold and iodine(iii) solution
The Experiment
A few days ago I saw a video of dissolving gold in the condition of $\ce{ICl3/HCl(aq)}$. In the video, $\ce{ICl3(s)}$ is added to a test tube, followed by adding conc. hydrochloric acid....
0
votes
0answers
23 views
Database for experimental diatomic ionization energies
I am looking for a database, in which the experimental ionization energies (and e.g. heat of formation) of atoms and diatomic molecules are listed as files.
If it comes with a Python package, that ...
0
votes
0answers
27 views
Visualization of all hcp voids
There are 12 tetrahedral voids and 6 octahedral voids in hcp unit cell but I can't find any image that can show all tetrahedral voids and all octahedral voids in hcp unit cell (the common picture in ...
6
votes
1answer
146 views
What is the physical state of vitamin E acetate at room temperature and normal pressure
Vitamin E acetate ((+)-alpha-tocopherol acetate) is sold as semi-solid/liquid by Sigma and their safety data sheet gives the melting point as 25 °C. On the other hand, internet databases such as ...
3
votes
1answer
49 views
Do companies recover carbon dioxide and water from the purification step of cryogenic air separation, and how?
In the 3rd step of cryogenic air separation, filtered air is purified to remove water, $\ce{CO2},$ and hydrocarbons from the $\ce{N2}$-$\ce{O2}$-$\ce{Ar}$ stream. Im interested in knowing what happens ...
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0answers
36 views
Water replacement for pressure-testing [closed]
Due to circumstance, our Data Centre build has some delays and it currently looks like we're going to have to perform a hydrostatic test of our sprinkler system with live computers in it.
As I have ...
4
votes
1answer
87 views
Timescales in Chemical Analysis
Has anyone seen a comparative list of typical run times of the techniques used in analytical chemistry? I am making a list of rough timescales of analytical techniques (for a slide). Assume that the ...
1
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0answers
43 views
How to dissolve PLA/PCL/PMMA?
I have a research about electrospun membrane synthesis where I dissolve PLA pellets in chloroform:methanol (3:1) for 3 hours and also PCL pellets in chloroform:methanol (3:1) for 3 hours too. Another ...
0
votes
0answers
37 views
Supposed low temperature CaC2 synthesis
I came across an interesting reaction on allreactions.com under silicon tab:
SiO2 + 5C(coke) + CaO = Si + CaC2 + 3CO (800-1000°C)
Unfortunately the website doesn't provide sources and I wanted to read ...
0
votes
1answer
51 views
Diborane reduction
I am stuck at a step in reduction of alkene using $\ce{B2H6}.$ I assume that step 1 is the addition of borane to alkene. After that a water molecule attacks $\ce{-BH2},$ it being a Lewis acid. ...
9
votes
3answers
2k views
What is “super” in superphosphate?
This question is inspired from a previous question(marked unclear). I don't know about the context of that question but I was intrigued by a statement in that question:
Superphosphate is used ...
1
vote
0answers
29 views
Determining the composition of basic copper sulfate by titrimetry
A colleague shared an undergraduate level classical gravimetry/titrimetry experiment on determining the stoichiometry of basic copper sulfate. I am looking for a reference for this type of experiment. ...
6
votes
2answers
938 views
What is the most convenient way to prepare ferrous oxide (FeO) in the laboratory?
The Wikipedia page for ferrous oxide states that $\ce{FeO}$ can be prepared by the thermal decomposition of iron(II) oxalate, with the following reaction:
$$\ce{FeC2O4 → FeO + CO2 + CO}$$
And that ...
1
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0answers
136 views
Solubility product constant of copper(II) bromide in water
One of the questions from chegg.com mentions $K_\mathrm{sp}(\ce{CuBr2}) = 6.3\cdot 10^{-10}$, but I suspect this value might be incorrect.
Could anyone confirm or refute that $K_\mathrm{sp}$ value?
...
6
votes
0answers
116 views
Where to find experimental spin-orbit coupling constants?
I am searching for experimental spin-orbit coupling constants, particularly for main group elements and Cr(0) to calculate correlation consistent Composite Approach (ccCA) energetics. This method ...
2
votes
0answers
43 views
What is the activation energy barrier of uncatalyzed nitrogen fixation?
I'm interested in the activation energy ($E_\mathrm a$) of uncatalyzed aqueous nitrogen fixation:
$$\ce{3 H2 + N2 -> 2 NH3}$$
Biology performs this reaction with the nitrogenase enzyme at room ...
0
votes
1answer
38 views
How to distinguish mass concentration and density?
I am writing a proof where I have to mention both with density and of a material and mass concentration (mass/volume) of a material.
I am using the letter $\rho$ to represent density, and I didn't ...
0
votes
1answer
69 views
Reference on Pople basis set
I need to write reference on 6-311++g(d,p) basis set in my work where I used it on atoms of I-II periods. Does anyone know where it was first published?
1
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0answers
36 views
Bond dissociation energy calculation
I am looking for methods to determine the dissociation free energy in a precise way, ideally from a simulations. My hope is to get the most precise values possible that are specific to the structure ...
4
votes
1answer
62 views
What chemical could dissolve low-density polyethylene?
What chemical could dissolve plastic aside from acetone? Preferably, low-cost and environmentally friendly. Any suggestions would be helpful.
I'm targeting for thin plastic (low-density polyethylene)....
0
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2answers
96 views
Density and concentration of hydroiodic acid [closed]
I weighted my hydroiodic acid sample: 25 ml weight 34.1 g, so the density is about 1.364 g/ml.
I want to know its concentration based on density. Does anyone have the corresponding density chart?
5
votes
2answers
174 views
Derivation of time probability distributions for single molecule kinetics
If we have a protein $\ce{A}$ that can bind to protein $\ce{B}$:
$$\ce{A + B <=>[$k_\mathrm{fwd,1}$][$k_\mathrm{rev,1}$] AB}$$
and the bound complex $\ce{AB}$ can be converted into $\ce{C}$:
$...
-2
votes
1answer
58 views
Can anybody recommend me a Calculus Based General Chemistry textbook? [duplicate]
I'm looking for a Calculus Based General Chemistry textbook. I checked Atkins Chemical Principals but I didn't liked it that much. I'd be awesome if I had some more options 😃
Thanks!
3
votes
1answer
51 views
What's the densest alkali metal?
This was asked in a school exam of mine, GCSE curriculum, exactly as it was worded on the title. I found this question a bit vague, and answered it francium, however of course francium is just an ...
1
vote
1answer
98 views
How often is the IUPAC Goldbook Updated?
I was wondering how often does the IUPAC update its Gold Book, ie, IUPAC Compendium of Chemical Terminology - the Gold Book.
It poped in my mind when I saw this question about jellium aromaticity, ...
2
votes
1answer
43 views
Book reference for electronic occupation of TM
Is there a book I can reference that has a table like this? I can't reference an online source on my thesis and all the pictures I have found online like this don't make their reference explicit.
...
7
votes
1answer
94 views
Reference for electronegativities of different metal oxidation states
A long time ago I was researching the effect of the self regulatory response in Fe and Co. I found that my results made sense based on the idea of the electronegativity of the ions considered. I found ...
6
votes
2answers
1k 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
0answers
56 views
Which material are piezoelectric buzzers made of?
Which material are these buzzers made of?
Does it depend on the manufacturer or they all are made of the same material? The Wikipedia page does not say anything about the material. I found some ...
1
vote
0answers
58 views
Does Raney nickel deprotect acetals?
I know that Raney nickel can deprotect thioacetals. Can it deprotect acetals as well?
I found this image which shows that it deprotects and removes many protecting groups. But there was no reference ...
13
votes
1answer
1k 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 ...
2
votes
0answers
67 views
Antisymmetrized Product of Strongly Orthogonal Geminal (APSG) method
To get a deeper understanding of electronic structure methods, like Hartree-Fock, MP2, and Coupled Cluster method, there are many small programs (codes) available in Python, C++ or Fortran, for ...
21
votes
2answers
3k views
Storing hydrofluoric acid before the invention of plastics
The first person to synthesize hydrofluoric acid in large quantities was Carl Wilhelm Scheele in 1771. This acid is known for its ability to corrode glass and metals.
What materials were the ...
10
votes
1answer
205 views
Is isobutyl chloride or ethyl chloride more reactive in an SN1 reaction?
Compare the rate of $\mathrm{S_N1}$ reaction in the following compounds:
We see that both compounds form primary carbocations. However, there is more hyperconjugation in the second compound as ...
1
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0answers
38 views
Which of these chlorides is more reactive? [duplicate]
We do learn that for $\mathrm{S_N1}$ reaction the rates are tertiary > secondary > primary > methyl. The reasons mentioned are usually inductive and hyper-conjugative effect.
But which of the ...
9
votes
2answers
530 views
How to determine omitted units in a publication
I have found a 1954 paper in J. Am. Chem. Soc. which gives various temperatures in degrees but does not specify units.
A snippet of the introduction is:
Titanium reacts appreciably with fluorine ...
4
votes
0answers
90 views
How to get the second electron affinity of tellurium?
I need the value of the second electron affinity of Te, i.e. the energy change associated with the attachment of an electron to a $\ce{Te-}$ anion
$$\ce{Te- + e- -> Te^{2-}}$$
In the books (e.g. J. ...
0
votes
1answer
96 views
Kb values of N,N-dimethylaniline derivatives [closed]
I need the $K_\mathrm{b}$ values for ortho-, meta- and para- positions of the following compounds:
I've looked and couldn't find them anywhere.
13
votes
2answers
2k views
Melting point of aspirin, contradicting sources
Querying wolfram alpha for the melting point of aspirin (link) returns $\pu{140 °C}$. The Wikipedia page for Aspirin lists $\pu{136 °C}$ instead, citing this book.
How am I supposed to know which ...
1
vote
1answer
27 views
Is there any book or text where ionic radius of elements are given?
So my research has me looking for ionic radius characterization. If anyone could post any link or give the name of any book where ionic radius of all elements are given that would be really great?
-1
votes
2answers
114 views
Equilibrium constant for complex cobalt ion
What is the equilibrium constant for the $\ce{Co(H2O)_6^{2+}(aq) + 4 Cl-(aq) <=> CoCl_4^{2-}(aq) + 6H2O(l)}$?
I've looked at various sources but none seem to yield the actual equilibrium ...
9
votes
2answers
623 views
Inorganic chemistry handbook with reaction lists
There is a handy handbook on common inorganic substances' properties called "Reactivity of Inorganic Substances" (eds. R. A. Lidin, V. A. Molochko, and L. L. Andreeva). It was originally written in ...
1
vote
1answer
93 views
Cerium (CeO) behavior in Glass Polishing?
I am basically working in semiconductor industry and I specifically taking care of CMP (Chemical Mechanical Polishing). We did polish glass (borosilicate type of glass) and we are using slurry (which ...
-1
votes
1answer
68 views
What is the molar extinction coefficient of azorubine (carmoisine, E 122)
I'd be grateful for the molar extinction coefficient ε of azorubine at the absorption maximum (about 520 nm), with an authoritative reference.
1
vote
1answer
44 views
What is a good resource for learning about the intermolecular bonding in water beyond high school? [closed]
I'm writing a paper for school on boiling water at various temperatures and pressures, but only noting cases wherein high temperatures were achieved without boiling under low pressure (metastable ...
