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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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 “...
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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:...
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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?
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1 answer
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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 ...
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1 answer
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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 ...
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Have guided diffusion models been applied in the chemistry informatics domain yet for molecule prediction/generation?

Guided diffusion models have been a big deal in machine learning recently. Are you aware of any literature (i.e. preprints or peer-reviewed publications) that have applied guided diffusion models in ...
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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 ...
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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 ...
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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; ...
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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?
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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 ...
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7 votes
1 answer
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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 ...
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Mapping of half-life decay for all elements/isotopes

Is there an open resource that helps illustrate all paths of decay for all isotopes (e.g. $\ce{^{99}Mo}$ decaying to $\ce{^\mathrm{99m}Tc})?$ I know the result state/transition map would be massive, ...
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IUPAC name of benzoyl chloride

I came up with two possible names: benzoyl chloride and benzene carbonyl chloride. I believe both names are correct. Wikipedia says that the preferred IUPAC name is benzoyl chloride: Can someone ...
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Interpretation of azeotropes from statistical mechanics derivation

In an earlier posted question titled Reason for the formation of azeotropes, @porphyrin presented an elegant derivation from statistical mechanics to interpret partial pressures for the two components ...
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Where can i find accurate bond angles?

I am trying to find places where I can have accurate bond angles of certain molecules such as $\ce{F2Se}$, $\ce{Cl2S}$, or even $\ce{S2Se}. I have looked everywhere and have found only 3 sources that ...
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Where to find the ChEMBL21 database in CSV format?

I come from an artificial intelligence (AI) background (and not from chemistry). However, my Ph.D. thesis is about Deep Reinforcement Learning for drug design. From one of the most famous papers in ...
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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{...
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Electrode potential of Br2/HBr half cell

I am wondering if it is possible to find the electrode potential of such a half cell: $$\ce{Br2 (l) + 2 e- <=> 2Br-(g)}$$ The standard electrode potential is for $\ce{Br-(aq)}.$ However, is it ...
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References for recommendation guidline values (cyclic hydrocarbons and i-alcylated hydrocarbons)

I am studying a measurement protocol of VOC emissions of a rubber gym flooring product and stumbled over some substances I didn't found any guideline values such that below this value it seems to be ...
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1 answer
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What are all the steps on the organic chemistry diagram called The Boat?

When I learnt A-level chemistry, I was told to use a diagram the teacher called The Boat. It was a diagram illustrating all the chemical reactions that you can do to simple organic compounds. For ...
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Anomaly in Faraday's constant measurements

I was reading someone's biography, where the writer stated his early interest in Faraday's constant measurements (this is set six decades ago). My understanding was that Faraday constant is a true ...
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Reference request: book that covers an overview of useful materials

I was wondering if there is a book that has a broad coverage of inorganic materials, like concrete, glass, and steel. Ideally the book would go into how each material is manufactured and some of the ...
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8 votes
3 answers
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Nucleophilicity of sterically hindered enolates

Problem Answer Question Here $\ce{KH}$ obviously acts as a base, and forms the enolate from the ketone, which subsequently act as nucleophiles causing an SN2 reaction on the $\ce{CH3I}$. When this ...
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Do CHF3 and acetone form a hydrogen bond?

I haven't been able to find a reference confirming that fluoroform forms hydrogen bonds with acetone. Do they?
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6 votes
1 answer
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How is the vibration of multiple atoms treated in vibrational spectroscopy?

Most of the advanced undergraduate textbooks on physical chemistry/ instrumental analysis show the case of a diatomic harmonic oscillator and derive formulae for predicting the frequencies. The ...
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Advantages of p-toluenesulfonic acid over sulfuric acid in the formation of acetals

I am currently working on an undergraduate experiment to form a cyclic acetal. We were asked to use p-toluenesulfonic acid as a catalyst rather than sulfuric acid. This seems to be common practice ...
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Can a Grignard reagent form magnesium halide with an alkyl halide? [duplicate]

$$\ce{RMgX + R'X' -> RR' + MgXX'}$$ Is this reaction possible? I am not able find any reference to it in the books that I have. Anyone has a reference?
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1 answer
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What is the alloying composition of the Zinc-Platinum System?

My research team and I are working on a bimetallic alloy consisting of Zinc and Platinum. We have looked for papers regarding the composition of Zinc-Platinum alloy. But there aren't many papers out ...
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11 votes
1 answer
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Does the largest known cycloalkane contain 288 carbon atoms?

If you Google "largest known cycloalkane", you will find this result: For context, there has been discussions on "largest known alkane": Largest alkane having a given alkane as ...
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Names of the f suborbitals. (Reference Request)

Today, I have been browsing the internet to know the names of the "f" orbitals. But I have varying answers on the web. Different sources seem to be stating different names. Like here, and ...
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Source for UV cut-off values of buffers

When I want to check a $\mathrm{p}K_\mathrm{a}$ value I look it up in CRC Handbook. Is there such source for UV cut-off values of various buffers? Usually books in chromatography contain tables with ...
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1 vote
1 answer
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How is electron-impact mass spectrometry data formally reported?

NMR data has the following format when reported in a paper: How would I go about reporting my EIMS data formally? I tried looking for documents online but couldn't find anything.
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2 votes
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Process parameters of typical chemical processes [closed]

I am researching to opportunity of heat recuperation in the chemical industry be means of high temperature heat pumps. However, I am having some trouble with finding suitable applications. I would ...
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5 votes
2 answers
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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) ...
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4 votes
2 answers
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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 ...
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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 ...
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3 votes
1 answer
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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 ...
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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, ...
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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 ...
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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 ...
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1 vote
1 answer
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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'...
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1 vote
1 answer
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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 ...
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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?
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-2 votes
1 answer
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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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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
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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 vote
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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) ...
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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 ...
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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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