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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17
votes
5answers
7k views

Which substance has the highest temperature range between melting and boiling point

Which substances exist that are normally liquid and that will not freeze nor boil even at relatively low/high temperatures as compared to the freezing and boiling points of water? Or how can I ...
4
votes
1answer
379 views

What are good books about MO theory that don't require a lot of math background?

Are there any books about MO theory that explain the theory to a certain detail but don't rely on a lot of math background or explain the math within the book?
9
votes
3answers
973 views

InChIKey generation from InChI

I am trying to find some good resources to understand generation of InChIKeys from the InChI. There seems to be no resource available online. I have gone through the Wikipedia article for InChI, but ...
3
votes
1answer
113 views

Sodium by electrolysis through glass

In his 1926 thesis Robert Cady Burts describes the production of sodium by electrolysis of sodium nitrate through glass. I can't find much else on this method. Are there any modern descriptions of ...
3
votes
1answer
81 views

Alcohol in the bloodstream modeled by differential equations

Does anyone know any good references which use partial differential equations to model the alcohol concentration in the bloodstream? I'm a mathematician, so I'm searching for a rigorous mathematical ...
8
votes
1answer
941 views

Difference between single point energy and dimerization energy

I am investigating potential energy surface characteristics of some electrostatic monomeric interactions e.g. $\ce{F-H}$...$\ce{F-H}$. I'm using DFT and SCS-MP2 to perform the necessary calculations ...
9
votes
0answers
435 views

Free Web-Based Orbital Solver to look into the Walsh orbitals of a perturbed cyclopropane

There exists a free online orbital calculator. When I draw cyclopropane it plots three molecular orbitals, but unfortunately it doesn't use the Walsh orbitals. Are there any free online tools which ...
4
votes
1answer
1k views

Has a non-carbon-based form of life been discovered since 2010?

In 2010 NASA announced the discovery of microorganisms that, after being treated in laboratory, could keep growing only using arsenic, instead of the (though very small amount of) phosphate they also ...
3
votes
1answer
85 views

kWh of radioactive elements database?

I recently been studying different radioactive elements. The most difficult part is find the output of these elements in the form of kWh. Is there a database or chart of these elements' output? And ...
1
vote
1answer
53 views

Are there any free phosphorus-31 NMR spectral libraries?

I know that there are some sites like Sigma Aldrich and AIST for $\ce{^1H}$ NMR and $\ce{^13C}$ NMR, but was wondering if there were any free sites to compare $\ce{^31P}$ NMR spectra?
6
votes
2answers
195 views

Synthesis Challenge

I have been trying to make a monomer reached a dead end in the middle. A B C are the products I have made so far respective order. After reaching C I wanted to prepare 2 but could not find a way to ...
2
votes
0answers
411 views

What is the explanation of the odd even effect in liquid crystals?

What is the most accepted theory for explaining the odd even effect in liquid crystals? Can anyone explain and refer the corresponding paper?
7
votes
3answers
240 views

Is it wise to use ECPs on light atoms for electronic structure calculations?

So, I have a big organic molecule consisting of $\ce{H}$, $\ce{C}$, $\ce{O}$, and $\ce{N}$ atoms and the goal is to find its equilibrium geometry and US/Vis spectrum. The molecule is so big that I was ...
2
votes
1answer
140 views

Standard Heats and Free Energies of Formation and Absolute Entropies of 2-Chloro-2-methylpropane

Does 2-Chloro-2-methylpropane have standard heats and free energies of formation and absolute entropies values in a liquid state? http://www.wiredchemist.com/chemistry/data/thermodynamic-data This ...
4
votes
3answers
255 views

What are some books, websites, etc. where I can find the detailed protocol for standardization of sodium thiosulfate with dichromate?

I am looking for a book or website such as "Vogel's Textbook of Quantitative Chemical Analysis" where I can find methods for analyzing/standardizing a particular species easily. I am not looking for ...
6
votes
1answer
5k 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 one order of magnitude ...
5
votes
0answers
58 views

Reference request for the number of solvents around a solute [closed]

I want to know if there is a way to find number of solvent molecules that are directly embracing a solute molecule (something like a reference or table that shows waters of hydration). Particularly I ...
1
vote
1answer
171 views

What fraction of hydrogen in air results in an explosive mixture?

I would like to know if there is documented evidence of the quantity of hydrogen to air that must be present in the mixture to risk explosion or flame.
7
votes
5answers
1k 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 ...
1
vote
0answers
51 views

Density g/cm3 of bleached viscose

I can find in literature what the density is for untreated viscose, but not for viscose that is bleached. Does this change the density? And what is the density for bleached viscose?
7
votes
1answer
590 views

UV/Vis spectroscopy transition reference

There are mainly fundamental transitions happening during excitation and UV/Vis spectroscopy (as n- > σ* ,π->π* ,n- > π ,..). I am looking for a good reference that shows these transitions for ...
6
votes
1answer
328 views

Reference for UV/Vis Spectroscopic Data request

I am looking for a complete reference of UV/Vis spectroscopic data for organic materials ( mostly interested in λmax ) . I have the CRC handbook but it only has data about some organic solvents in ...
2
votes
0answers
83 views

Ink / formulation chemistry: What lab requirements

Little open information can be found on the requirements of the manufacture, development and testing of gel and printing inks. It seems that most ink manufacturers have their own specific lab ...
1
vote
2answers
340 views

Equilibrium constants for lewis acids such as Ca2+

I need to calculate the theoretical $\mathrm{pH}$ in a $50~\mathrm{mL}$ water solution where $6.4\times10^{-4}~\mathrm{g}$ of $\ce{Ca^{2+}}$ is present. The reaction I base this on is the following $$...
1
vote
2answers
205 views

Cohesive Energy Density table request

Quick question: Any one knows a resource for Cohesive Energy Density of some organic materials ? I am not looking for any specific molecule, actually I want to plan my project based on available ...
11
votes
2answers
259 views

Proper dash to use for negative charge

What type of dash does one use when indicating something like F$^{-}$? I assumed it was a minus, since you indicate positive charge with a +, but there is one professor I know who insists that it ...
3
votes
1answer
1k views

Which plastic type is used inside dishwashers?

We have a drinking bottle made partly from polypropylene that wraps when washed in a dishwasher. We would like to change the plastic type so that it can withstand in dishwasher. I know for a fact ...
5
votes
1answer
2k views

Rate constants for water exchange

Are rate constants for water exchange of transition metal aqua-complexes tabulated anywhere ? I haven't been able to find a resource which is anywhere near comprehensive.
8
votes
1answer
1k views

What substance has the lowest Kₛₚ value?

What substance has the lowest $K_\mathrm{sp}$ and what is its value? The lowest I could find is $2.6\cdot 10^{-124}$ for cobalt(III) sulfide $\ce{Co2S3}$.
8
votes
4answers
7k views

Reason for the formation of azeotropes

Why is it that some liquid mixtures (that exhibit positive/negative deviation from Raoult's law) form azeotropic mixtures at certain compositions? What is the physical reason behind this; are there ...
30
votes
1answer
3k views

What would follow in the series sigma, pi and delta bonds?

I realise, that this question is a stretch, but I was wondering, how would a bonding orbital be called if it was formed from two $f_{x(x^2−3y^2)}$ or $f_{y(3x^2−y^2)}$ orbitals. Have there been any ...
6
votes
1answer
665 views

Is there a list of known rate laws for reactions?

I've been scouring the web for a website/pdf that lists/tabulates reactions and their corresponding rate laws. Something like: \begin{align} \ce{A + B &-> C} & \text{rate}&=1.234[\ce{A}]...
6
votes
0answers
351 views

What is the most accepted explanation of aurophilicity?

Gold has a special property called aurophilicity. Inorganic chemistry by Huheey has some explanation, but that was not enough to clear the conception.
19
votes
3answers
2k views

Conductivity as a function of acid concentration

I have conducted an experiment measuring the conductivity of both hydrochloric acid and sulfuric acid in solution respectively, with varying concentration. Wikipedia as well as a question on the site ...
4
votes
3answers
151 views

Open data in chemistry?

I am a student in computer science, which is a field where sharing research data and source code is very very much recommended. I am looking for sites where data from chemistry experiments could be ...
1
vote
1answer
272 views

How strong is 2,4,6-trinitrobenzenesulfonic acid?

What is pKa or Hammett's function of 2,4,6-trinitrobenzenesulfonic acid? PubChem gives pKa=0.13, but doesn't specify the solvent. Even if it's real value I doubt it's a value for water. Why? Because ...
11
votes
1answer
3k views

Why is electronegativity increasing with oxidation state increase?

I may be a rudimentary fact or something really "not-that-hard-to-figure-out", but In inorganic chemistry it is common to consider a single value of the electronegativity to be valid for most "...
6
votes
3answers
4k views

Periodic table for printing

I there a Good Version of a printable Periodic table Which is minimalistic and gives necessary information only such as - At. Number Element Name At. weight Shell configuration color coding of ...
0
votes
1answer
258 views

In ionic solids such as NaCl, do the cations fill interstital holes in the cation's cubic close pack structure? [duplicate]

Are binary ionic solids like $\ce{NaCl}$ comprised of a cubic close packed structure of the anions with the cations filling interstital holes or do the cations and the anions contribute to the cubic ...
2
votes
2answers
15k views

Determine the Value and Units of the Rate Constant

Consider this initial-rate data at a certain temperature for the reaction described by $$\ce{2NOBr(g) \rightarrow 2NO(g) + Br2(g)}$$ ...
4
votes
1answer
280 views

Is there a pressure dependent function for freezing points of water and carbon dioxide?

I'm trying to determine whether or not certain compounds form solid ice at certain atmospheric pressures. These pressures vary significantly, from 0.001 atm to 800 atm. I understand that there is no ...
4
votes
1answer
372 views

Is oil shinier than water? Why?

The physics part: The part that talks about being shiny, I agree, is mainly physics. But proceed in my question, and you'll see how it's a chemistry one. We know things are shiny if they either ...
7
votes
2answers
636 views

Cell overpotential diagrams

Is there anyone who knows a book where I can find a detailed explanation of cell overpotential diagrams, like the ones shown here? Thanks in advance!
0
votes
3answers
750 views

Luminescent materials under IR radiation?

is there a database somewhere of materials that are luminescent when exposed to Infra Red radiation?
4
votes
0answers
77 views

Is there an authoritative list of chemical reactions/transformations? [closed]

Is there somewhere where I can find an authoritative list of chemical reactions, energy requirements, known catalysts, etc.? If not, how do you know if and how to transform substance A to substance B? ...
10
votes
2answers
1k views

Public API for physical properties

Is there a publicly available API that serves physical property data for organic molecules? Pubchem does not serve properties, ChemSpider closes property access to API calls, and Toxnet only serves ...
-1
votes
1answer
3k 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 ...
1
vote
0answers
37 views

Good resource for chemical equivalence

I need a good resource that explains the concept of chemical equivalence and its various application in physical chemistry. I have not found anything worthwhile from a Google search.
2
votes
1answer
664 views

Good book for foundational chemistry [closed]

I need a good book that explains the basics of chemistry in a lucid and importantly, systematic manner. Most books on this subject are not comprehensive and assume that the reader is well acquainted ...
4
votes
1answer
344 views

Could you suggest me a good coupling method for amide synthesis between tetrahydroisoquinoline and a carboxylic acid?

I want to synthesize an amide using tetrahydroisoquinoline and an unsaturated carboxylic acid which is light sensitive. I tried using DCC as a coupling agent and DCM as the solvent at room temperature,...