# All Questions

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### Steriochemistry of pinacole pinacolon rearrangement

I just read an example of pinacole pinacolon rearrangement, in 1,2-methylhexane-1,2-diol. (Forgive me if the IUPAC name is wrong). From this I can see the migrating group is attacking from the back ...
39 views

### Forces operating in molten ionic solids

What type of forces exist between ions in molten ionic solids? If this force is electrostatic attraction only, then how is it different from electrostatic interaction when ionic compound exist as ...
8 views

### Are (sponataneous) exothermic reactions spontaneous due to increase in stability of products or increase in the entropy of the surroundings?

The lattice formation of an ionic compound from its infinitely separated gaseous ions is spontaneous under standard conditions, but I cannot figure out the 'driving force' behind this. One way to look ...
34 views

### Why is nitrate anion substituted but bromide anion is not in Von Richter reaction?

In Von Richter reaction which is a nucleophilic aromatic substitution. As according to this source, there is only a 37 percent yield of the product.I want to know what are the competing side ...
3k views

### Why can the acidic strength between H2S and HCl be explained on the basis of electronegativity but H2S and H2O can't?

Consider simply aqueous solutions of $\ce{H2S}$ and $\ce{HCl}$ . It is pretty much known that $\ce{HCl}$ is stronger than $\ce{H2S}$ in water. The reason behind that first is the electronegativity of ...
97 views

### Ventilating combustion byproducts in water heaters

I'm designing a system that will heat water by burning natural gas which is commonly available. I would like to have a slow flame because water will need to reach $\mathrm{70^\circ C}$ and stay there. ...
77 views

### Kinetic energy of liquid

Does intermolecular force of attraction have anything to do with molecules having more energy in their liquid state than their solid state? If not, what is responsible for greater kinetic energy in ...
19 views

### Dominant factors rendering very low solubility of large aromatic molecules

In terms of structural basis, alkanes are insoluble or immiscible in water because of such presence of C–H...O interactions that are in regime of van der Waals interaction, which tends to be regarded ...
11 views

### What is the relation between distance from nucleus and shielding power?

In my chemistry textbook it is given as: "Comparing orbitals within the same shell, we say that the s orbital is more penetrating than the p or d orbitals, meaning that an electron in an s ...
25 views

### Can you develop algorithms to predict synthesis of peptides?

This may be a very foolish question, but do (complex) algorithms exist to predict the steps and materials involved (or therefore different options and paths) in synthesis for the given input of for ...
19 views

### Proof of average spherical particle radius, with concentration, density, number of particles [closed]

During the semester, when studying light scattering, we 've been given an exercise: Prove, that the mean radius of spherical particles is given as: $r = \sqrt[3]{\frac{3cV}{4\pi\rho N}}$ where: $c$ ...
50 views

### dehydration of an alcohol (3-methyl-1-phenylbutan-2-ol)

I was thinking of dehydrating this alcohol: 3-methyl-1-phenylbutan-2-ol Its structure is: My concern is which of the following would it form: The problem is that the first one comes from a stable ...
23 views

### Heating effect on Orthoboric Acid

I am a high school student and was studying about the effects of heating orthoboric acid, and I saw two textbooks putting different statements. One book says, On heating above 370K, orthoboric acid ...
21 views

### What will be the structure of the product with appropriate relative stereochemistry? [closed]

What will be the structure of the product with appropriate relative stereochemistry?
8k views

### Why are pi bonds only formed when sigma bonds are formed?

While studying about bonding there was one statement that "pi bonds can only be formed only with sigma bonds" as we know that in double bond there is 1 sigma bond and 1 pi bond but then one question ...
71 views

### Are all chiral carbons sp3 hybridised?

I had this doubt, whether all asymmetric chiral carbons must necessarily be $\mathrm{sp^3}$ hybridized. For sure, we know that double or triple bonded carbon atoms don't shows such chirality, but is ...
2k views

### Why Freundlich adsorption isotherms fails at high pressure conditions?

Experimentally it was determined that extent of gas adsorption varies directly with pressure, and then it directly varies with pressure raised to the power 1/n until saturation pressure Ps is reached. ...
31 views

### Is hydrogen peroxide a better oxidizing agent than chlorine gas?

If we compare the standard reduction potentials of $\ce{H_2O_2}$ with that of $\ce{Cl_2}$: $\ce{H_2O_2 + 2H^+ + 2e^- <=> 2H_2O : E^o = 1.78V}$ $\ce{Cl_2 + 2e^- <=> 2Cl^- : E^o = 1.36V}$ (...
546 views

### Determining if the product would be cis or trans after an anti elimination on fischer projections

I find these kind of problems really confusing for some reason, but I saw a way on the web and tried doing it that way: I considered the basic Fischer operations (Vertical: Below the plane of paper, ...
19 views

### Hybridisation of XeF4

Is hybridisation of orbitals of Xe in XeF4 sp3d2 or dsp2? Are the lone pairs present in hybrid orbitals? How to prove whether they are hybridised or not in the square planar geometry?
55 views

### Elimination reaction mechanism decision (order = 1 or 2)

Match the following: \begin{array}{} & \textbf{Column I}&&\textbf{Column II} \\ \text{(A)} & \ce{CH3-CHBr-CD3} \text{ on treatment with alc. KOH gives}& \text{(P)}& \text{E1 ...
59 views

### Hund's rule for comparing term symbol energies in excited state

This question was asked in an exam: The lowest energy electronic state for excited state carbon atom is, a. $^1D_2$ b. $^3D_1$ c. $^3D_3$ d. $^3D_2$ Although we have been taught Hund's rule for ...
59 views

### Why does CO2 diffuse out of a cylinder in the absence of a pressure difference?

Suppose I have a thermally insulated cylinder containing carbon dioxide (assuming it is ideal) at 1 atm pressure(atmospheric pressure is 1 atm). Now let's consider two cases: CASE-1: I cut open the ...
45k views

### Why doesn't water burn?

Hydrogen is flammable, and for any fire to burn it needs oxygen. Why does a compound made of hydrogen and oxygen put out fires instead of catalyzing them? I understand that hydrogen and water are ...
43 views

### Why doesn't the graph of radial part of wavefunction of 2p orbital change its sign? [closed]

Below I have given the graphs of radial part of the wave functions of $\mathrm{2s}$ and $\mathrm{2p}$ orbitals respectively. The graph of the $\mathrm{2s}$ orbital makes sense. It has a radial node ...