Questions tagged [reference-request]
This tag is for questions looking for a single specific, or a small number of (citable) references.
0
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0answers
13 views
Carbon monoxide from activated charcoal filters
We use activated charcoal in air filters of the ventilation system to remove pollutant vapours from the exhaust air. Before the filters, the air is heated a bit to avoid condensation of water. ...
0
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0answers
49 views
What determines the potential of an unpoised electrode?
Suppose you have a piece of gold electrode placed in an aqueous solution with negligibly few gold ions. The Nernst equation is not applicable in this situation because there is no thermodynamic ...
2
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0answers
128 views
What studies show that d orbitals don't play an important role in covalent bonding? (> period 2 elements) [closed]
Take a look at all the following molecules: $\ce{SO3^{2-}}$, $\ce{SO2}$, $\ce{SO4^2-}$, $\ce{PF5}$ and many more you can add. In all these there is a controversy of one of these two types:
Is formal ...
0
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0answers
16 views
Reference Request - An Intuitive Approach to Chemistry [duplicate]
I am looking for a book on general chemistry that explains the theories. For example, it may start out with talking about chemistry before the molecular theory (such as the conservation of mass and ...
7
votes
3answers
233 views
What is Nesbet's theorem?
In a talk by Frank Neese there was a slide with title "Nesbet's theorem" and an equation indicating something like "if your wavefunction has the double excitation amplitudes correct, then you can get ...
1
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0answers
48 views
Does CF3COOH undergo decarboxylation ? Why or why not? [closed]
Does $\ce{CF3COOH}$ undergo decarboxylation ? Why or why not?
Attempt:
I feel it should decarboxylate because $\ce{CF3-}$ carbanion must be stable due to fluorine's -I (electron withdrawing) ...
3
votes
2answers
129 views
Where can I get potential energy surface for simple molecules?
I'm looking for potential energy functions for simple molecules, such as water or hydrogen sulfide. I only need the region around the equilibrium geometry, preferably as a Taylor series expanded in ...
2
votes
1answer
131 views
Reduction of 2-cyclohexenone to cyclohexanol
Is $\ce{NaBH4}$ a suitable reducing agent for the conversion of 2-cyclohexenone to cyclohexanol?
In Clayden (page 506, second edition), I have found the reduction of cyclopentenone to cyclopentanol ...
3
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2answers
104 views
Proof of the chemical potential formula
My textbook as well as Wikipedia both state the formula $\mu_A = \mu_A^0 + RT\ln\{A\}$ which gives the chemical potential $\mu_A$ of a chemical species $A$ as function of the standard chemical ...
1
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1answer
57 views
What is the solublity of water in liquid carbon dioxide at low temperature?
The solubility of water in liquid carbon dioxide has been investigated by Hosmer W. Stone in 1943 from
-29 to about 22 °C.
Is there any research done on the solubility of water in liquid $\ce{CO2}$ ...
1
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1answer
49 views
Where can I find the standard molar entropy for ammonium bicarbonate?
I'd like to know the standard molar entropy S0solid for ammonium bicarbonate to use in an example in class, to calculate ΔS0 for the reaction, NH4HCO3(s) → NH3(g) + H2O(g) + CO2(g).
Already checked: ...
-1
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1answer
57 views
Entropy change of evaporating NaCl [closed]
What is $\Delta S$ for this process?
$$\ce{NaCl(s) -> NaCl(g)}$$
(A reference that I could quote would be ideal.)
-1
votes
1answer
25 views
Source for medium quantities of salts [closed]
Where are good sources for medium quantities (10-1000kg) of chemicals, particularly salts?
For quantities <10kg, I know of lots of options from lab suppliers (Sigma Aldrich, Alfa Aesar, etc). ...
0
votes
1answer
49 views
How to synthesize tetrabutyl titanate from titanium dioxide powder?
How do you synthesize tetrabutyl titanate $(\ce{[CH3(CH2)3O]4Ti})$ from titanium dioxide ($\ce{TiO2}$) powder? As I know, we can get $\ce{TiO2}$ from tetrabutyl titanate, but how can we do the ...
2
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2answers
119 views
A basic question about tetramethylammonium hydroxide
This is a follow-up to the question here. There is an answer claiming that tetramethylammonium hydroxide (TMAH) is a suitable strong base that can be used instead of the usual alkalies to reach pH 14....
0
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0answers
48 views
Calculating rate determining step in C-H bond activation reactions
In C-H bond activation reactions, after performing isotope substitution experiments with deuterium, how is the rate limiting step of the reaction determined? I'm looking for references on performing ...
1
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0answers
29 views
Readings about chiral resolutions at the undergraduate level
Does anyone know of a resource which clearly explains the scientific theory and experimental methods involved in chiral resolutions?
I have access to the American Chemical Society, Tetrahedron, ...
8
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0answers
160 views
How are polarizabilities measured experimentally?
Most common spectroscopies that produce either a full spectrum, a tensor, or a scalar value have a specific instrument associated with them that is relatively self-contained and not custom. For ...
5
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0answers
246 views
Reaction rate constants for methane combustion
I can't find a rate constant or activation energy for the methane combustion reaction given by:
$$\ce{ CH4 + 2O2 -> CO2 + 2H2O}$$
Do all reactions have a rate constant? The NIST web site lists ...
0
votes
1answer
45 views
Thermal oxidation of gold(I) sulfide
As far as I know the chemistry of $\ce{Ag}$ and $\ce{Au}$ are almost the same; because $\ce{Ag}$ belongs to the 4d series and $\ce{Au}$ belongs to the 5d series, we know the size of 4d and 5d are ...
9
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0answers
192 views
Is it possible to self-teach yourself most of organic chemistry and biochemistry without access to a lab or university resources? [closed]
I'm stationed on a US Navy warship and I often wonder if its possible to master these subjects without access to a college instructor. I've been reading introductory books on organic chemistry and ...
10
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2answers
410 views
Image of crystal structure
Is there any websites or resources where I can get a good image of a certain crystal structure? In my case I'm looking for lead(II) tungstate $\ce{PbWO4}$ and I can't find a vivid graphic on google (...
4
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0answers
53 views
How to tell 'orthokinetic' apart from 'perikinetic' based on their prefixes?
During a test in colloid and surface chemistry, students were asked to distinguish between two terms: orthokinetic and perikinetic coagulation.
The rate of aggregation is in general determined by ...
8
votes
1answer
132 views
What is “physicist's water”?
There is a statement on page 60 of this dissertation:
the "physicist's water molecule" ($\ce{O-H = 1.1 \mathrm{\mathring{A}}, \angle HOH = 104^\circ}$)
I understand it to be a model similar to the ...
2
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0answers
41 views
Can someone suggest me important references for deriving EOM in MCSCF?
I am currently starting a project dealing with MCSCF method. Can someone please give me references (papers or lecture notes are preferred) which may be considered as the "corner stones" in the history ...
0
votes
2answers
158 views
Do auto-catalytic aromatic compounds capable of forming self-replicating molecules exist?
I want to know are there any aromatic compounds able to catalyze their own synthesis? Do aromatic compounds with molecules capable of self-replication exist?
P.S.I'm looking specifically for ...
7
votes
1answer
222 views
What are introductory level books on chemical engineering?
I'm currently enrolled in a chemical engineering course in my college, and in my first year, I'd like to get a nice introductory book on that field of study.
I'd prefer that the book covers several ...
0
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0answers
42 views
Books on Molecular Orbital Theory [duplicate]
I need good books on Molecular Orbital Theory. The book(s) should have the basics, and the level should be such that it can be studied by students who are in college or university, about the age of 21 ...
0
votes
1answer
54 views
What is the reaction mechanism of a selective catalytic reaction with urea?
What is the reaction mechanism of the following reaction:
$$\ce{4NO + 2(NH2)2CO + O2 -> 4N2 + 4H2O + 2CO2}$$
I expect that the catalyst is vanadium oxide and titanium oxide.
Where can I find a ...
1
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0answers
186 views
How close are we to building an actual nanobot? [closed]
I want to know how far current nanotechnology is from creating an actual real-world nanorobot? Also, does such a thing actually exist, or is it just a nice name for an umbrella term to show off to the ...
13
votes
2answers
737 views
What is “chemical pressure”?
While reading some publications on solid superconductors, I encountered a term "chemical pressure" a few times, which is usually attributed to the changes of superconducting transition temperature $T_\...
3
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0answers
58 views
Do any efforts to construct artificial biochemistries exist and what compounds are they based on? [closed]
I'm a researcher interested in the fields of origins of Life, astrobiology and theoretical biology in general but I must admit I think my knowledge of chemistry outside biochemistry is a little bit ...
20
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1answer
1k views
What is the nature of the bonding in cyclotriphosphazene?
The bonding in $\ce{(NPCl2)3}$ (and other compounds of the form $\ce{(NPR2)3}$) has historically been described using the ‘Dewar island model’.
By analogy to benzene, $\ce{(NPCl2)3}$ is π-electron ...
1
vote
1answer
188 views
House-hold chemistry experiments for a high-school student [closed]
I want to experiment the things which we learn in chemistry as a twelfth grader.I want to do them at my home but I'm not supplied with enough reactants.What can I do by using such reactants.
I tried ...
10
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0answers
121 views
Possibility of π–π stacking in non-aromatic systems
Is it possible to have π–π stacking for non-conjugated double bond systems?
For example, can the carbonyl groups of two urea molecules participate in π–π stacking? Although urea prefers to stay in ...
1
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1answer
66 views
Does aqueous component contribute to the equilibrium constant?
Consider an equilibrium reaction with an aqueous solution $\ce{A(aq)}$ in equilibrium phase with gas:
$$\ce{A(aq) + B(g) <=>[$K_\mathrm{eq}$] C(g)}$$
Would the equilibrium constant have aqueous ...
2
votes
1answer
75 views
Discrepancies in calculating free energy values listed in Stumm and Morgan
I am hoping someone can help me with a clarifying a calculation on a fundamental thermodynamic understanding of reactions. Below is Table 2.5 from Stumm and Morgan's Aquatic Chemistry.
Table 2.5. ...
7
votes
2answers
700 views
Is there an iron–iron bond in diiron nonacarbonyl?
Diiron nonacarbonyl, $\ce{[Fe2(CO)9]}$, is often depicted with an Fe–Fe bond as shown at the left-hand side:
The Fe—Fe bond is usually invoked in order to (1) explain the observed diamagnetism and (2)...
1
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0answers
44 views
What's the most trusted source for bond lengths? [closed]
I'm doing some computational work and am manually inputting Z-matrices for the molecule (no GUI support for my program). For this, I need bond lengths:
I tried Herzberg's book
I tried a basic ...
13
votes
1answer
131 views
What function is used to graph the potential curve of two hydrogens with parallel spins?
TL; DR
I am asking for
an analytic potential curve function for the triplet state of $\ce{H2}$ (preferred) with experimental parameters, or
experimental data (enough points to realise a smooth-...
2
votes
0answers
25 views
Help finding a thixotropic suspension with specific properties for 3d printing
I currently doing research on 3d printing on circuit boards. The technique we are using is to put a conductive material, I.e ceramics/metal in a gel/polymer, to print the suspension and then when is ...
-5
votes
1answer
53 views
Handling reactions in chemistry [closed]
Q:1 So far, after studying chemistry for two years I am unable to figure out any well-defined methodology of handling a particular reaction either in General or Organic chemistry. So I would ...
4
votes
0answers
65 views
Book for understanding synthetic techniques and apparatus(with pictures) [closed]
Is there a standard textbook to understand numerous laboratory apparatus and the assembly techniques that can be used for carrying out different processes (with pictures)?
I have been cleaning my lab ...
5
votes
0answers
78 views
Advanced Quantum Chemistry Reference for Reactivity Phenomena
I'm currently in organic synthesis seeking to develop quantitative "physical" (that of a physicist), rather than "chemical", intuition for areas where traditional VSEPR/ MO models cannot fully ...
2
votes
0answers
86 views
Reaction of PLA plastic with methane or carbon dioxide
PLA (polylactic acid) plastic is commonly used for 3D printing, and I would like to create a 3D printed part that can be used in an experiment with methane ($\ce{CH4}$) and carbon dioxide ($\ce{CO2}$) ...
18
votes
1answer
193 views
What did actually happen when Staudinger tried to synthesise diamond?
It is a famous reaction that used to be a teaching lab experiment, but is now banned in Germany, because it is too dangerous. To quote-translate quite liberally from the German www.seilnacht.com:
...
6
votes
1answer
151 views
Different chemoselectivity of transition metals in catalytic hydrogenation
I am quoting my Clayden et al 2nd edition:
Some catalysts are particularly selective towards certain classes of compound – for example, Pt, Rh and Ru will selectively hydrogenate aromatic ...
2
votes
0answers
75 views
Reference for assignment of symmetry (term symbols) of electronic states
I am looking for a textbook and/or internet resource where I can find the reference for assignment of symmetry of electronic states systematically.
For example, $$ \ce{^1\Delta^{}_{g}}, \ce{^3\Sigma^{...
3
votes
2answers
54 views
Where can I find ranges of isotope abundances?
I'd like to know how much stable isotopes like $\ce{^{13}C}$, $\ce{^2H}$, $\ce{^{17}O}$ and $\ce{^{18}O}$ deviate from their natural abundances in the earth's crust among all possible compounds we may ...
1
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0answers
59 views
Where can I find a downloadable database of basic physical and chemical properties?
The web has many online databases of properties of compounds locked behind search interfaces, but I can't find anything you can actually download.
I want a corpus of data that might allow me to, say, ...
