Questions tagged [inorganic-chemistry]

Inorganic compounds generally do not have C-H bonds, while organic compounds do have such bonds. The distinction between inorganic and organic chemistry, however, is far from absolute.

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Existence of Dichlorine Pentoxide

I searched the net and a lot of books, but I was unable to find any information about dichlorine pentoxide. Does dichlorine pentoxide($\ce{Cl2O5}$) exist? If it doesn't exist, then why so? If ...
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What is the hybridisation of trifluoromethyl free radical?

Having three σ bonds in a similar manner to $\ce{CH3^·}$ free radical, $\ce{CF3^·}$ should also have $\mathrm{sp^2}$ hybridisation. However, if we look at its shape, it is pyramidal and not planar ...
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How does HF dissolve glass?

By what mechanism does HF proceed in dissolving glass? Why is it the only acid that has this capability? Is it because of the small size and high electronegativity of fluorine?
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What would happen if someone consumed a Silica Gel Packet? [closed]

Most packaged goods have the tiny Silica Gel Packets packed along with a clear warning on every single packet. My question is: What hazards of desiccant silica gel are they concerned about that it is ...
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What is the alternative to chromyl chloride test?

Chromyl chloride test is by far the best test to determine the presence of chloride ions in a salt because no analogous compounds are formed with fluorides, bromides, iodides and cyanides, so this ...
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Why does magnesium have an exceptionally low melting point?

Why does magnesium have a lower melting point than both calcium and beryllium? It does not seem to fit into the group trend.
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How do you calculate a unit cell's dimensions from an XRD spectra?

My inorganic lab had us do an XRD measurement, but I've never been explained how to interpret the data. Question: Calculate the unit cell dimensions $a$, $b$, and $c$, for $\ce{YBa2Cu3O7}$ from ...
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Why can't phosphorus trifluoride be used as a Lewis acid catalyst in electrophilic substitution of benzene?

Which of the following cannot be used as Lewis acid in the electrophilic substitution of benzene? $\ce{BF3}$ $\ce{SbCl3}$ $\ce{FeCl3}$ $\ce{PF3}$ My Attempt: $\ce{BF3}$ and $\ce{...
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Explanation of bond angles in the aluminium chloride dimer

In order to attain stability $\ce{AlCl3}$ dimerises to $\ce{Al2Cl6}$ whose structure is depicted as: I want to understand why one of the bond angles is $79^\circ$ and the other $118^\circ$. Is it ...
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What is the structure of iodide of Millon's base?

In qualitative analysis, $\ce{NH4+}$ ions are confirmed using Nessler's reagent:- $$\ce{NH4+ + 2[HgI4]^{2−} + 4OH− → HgO·Hg(NH2)I ↓ + 7I^{−} + 3H2O}$$ The brown precipitate ...
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Terminal Alkyne in Suzuki Coupling

I've done a very similar reaction to the one below but by TLC I observe only starting materials. It's super clear that nothing else is going on. Conditions: K3PO4, Pd(dppf)Cl2, dioxane/water, heat to ...
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IS DMSO-o a σ-donor, a π-donor, or both?

DMSO is an ambidentate ligand that can bind in a κO fashion via the oxygen lone pair and in a κS fashion via the sulfur lone pair. I know that DMSO can behave as a π-acceptor when it ...
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Relative acidity of aqueous LiF, SnCl2, and YCl3

Which one of the following salts make the highest and lowest pH when dissolved in water? $$\ce{LiF, SnCl2, YCl3}$$ My approach was : considering the corresponding aqua acids, the order of acidity ...
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If d-electrons are such poor shielders, why do trends increase more gradually across the d-block than the s or p-block?

If I understand correctly, the shielding effect of d- (and f-) electrons seems to be much poorer than those of s- and p-electrons, due to the fact that they are less penetrating, have less electron ...
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Does this binary compound of C and N - isoelectronic with carbon suboxide - exist?

I am a mathematician not a chemist, so my questions are naive and rather combinatorial. I am intrigued by the possibility of the following compound: $$\ce{N- = N+ = C = N+ = N-}$$ which ought to ...
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What does a comma signify in inorganic chemistry?

$\ce{(Ca{,}Co)CO3}$ I have never ever seen this before. What does this mean exactly?
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Magnetic moment μ approximation

I've been reading a bit about the magnetic moment (spin-only) $\mu_{s.o}$ where they give a formula relating this to the number of unpaired electrons $$\mu_{s.o}=\sqrt{n(n+2)}$$ where $n$ is the ...
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How can the equilibrium shift, while Kc remains constant?

Consider the following reversible reaction. $$\ce{Cr2O7^2-(aq) + H2O(l) <=> 2 CrO4^2-(aq) + 2 H+(aq)}$$ What will happen to the position of equilibrium and the value of $K_c$ when more $\ce{H+}$ ...
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Difference between organic and inorganic chemistry [duplicate]

This question may seem vague at a first glance, and even lead to the thought: "come on, just go Google it!" But it's a real question because it does not make enough sense to me (even after Googling ...
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How does copper reduce dilute nitric acid to nitric oxide and concentrated nitric acid to nitrogen dioxide?

Here are the 2 equations: \begin{align} \ce{3Cu + 2NO3- + 8H+ &<=> 3Cu^2+ + 2NO + 4H2O} & E &= 0.62~\mathrm{V}\\ \ce{Cu + 2NO3- + 4H+ &<=> Cu^2+ + 2NO2 + 2H2O}& E &...
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Is chlorine the central atom in NOCl?

We've been told that the in the structure of $\ce{NOCl}$ the central atom is $\ce{Cl}$ (rather than $\ce{N}$) due to some exception. Looking up on internet I could not find anything to support this. ...
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What exactly is the use of photographic films in cameras? How are the pictures generated?

By definition: Photographic film is a strip or sheet of transparent plastic film base coated on one side with a gelatin emulsion containing microscopically small light-sensitive silver halide ...
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Is beryllium an alkaline earth metal?

For context: I got a question asking, "Which of the following alkaline earth metals do not give flame colour?". I quickly marked $\ce{Be}$ and $\ce{Mg}$ and got negative marks. The following is a ...
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Should bromine water be called a solution?

Bromine water is a reagent which is used to test for unsaturation in organic compound. It is $2.8~\%$ bromine in water. In many places, it is refer to as bromine solution. But it is observed that ...
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Why can NCl3 be hydrolyzed but CCl4 cannot?

While explaining why $\ce{CCl4}$ cannot be hydrolyzed, we say carbon atom doesn't have any d-orbitals and therefore a water molecule (lone pair electrons of $\ce{O}$ atom) cannot form coordinate bond ...
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Why are low spin tetrahedral complexes so rare?

As I was going through Concise Inorganic Chemistry by J. D. Lee, I realised that there are simply no low spin tetrahedral complexes mentioned in the book. Is there any specific condition required for ...
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Thermal stability of alkali metal hydrides and carbonates

Why is it that thermal stability of alkali metal hydrides decreases down the group, but for carbonates, it increases? I used Fajan's rule to check for ionic character but somehow this is only ...
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Formula of Oxone

A problem in my book asked the commercial name of sodium peroxide. The answer given was 'Oxone'. Even the website https://www.911metallurgist.com/oxone/ mentions oxone as sodium peroxide. However, ...
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Geometry of the pentachloridoindate(III) anion

According to Brown et al.,1 the crystal structure of $\ce{[NEt4]2[InCl5]}$ reveals that the pentachloridoindate(III) anion, $\ce{[InCl5]^2-}$, adopts a square pyramidal $C_\mathrm{4v}$ geometry (VSEPR ...
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How is the bonding in the [Au6C(PPh3)6]2+ cluster explained?

How can carbon form six bonds in such a compound as $\ce{[Au6C(PPh3)6]^2+}?$ I understand how carbon with five bonds can be formed $(\ce{CH5+},$ for instance), but it shouldn't have enough electrons ...
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Carbon tetraradical

I was just reading through Reactions: The private life of atoms by Peter Atkins and I noticed that in Chapter 3, the chapter on the combustion reaction, the author writes: As we watch we see $\ce {...
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Derivation of the Orgel diagram for octahedral d2 complexes

The Orgel diagram for a typical octahedral $\mathrm{d^2}$ complex is shown below: (source: Kettle, Physical Inorganic Chemistry, p 146) I understand that the right-hand half of the graph shows how ...
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Why is tantalum so unreactive?

What is the fundamental argument behind explaining why Ta metal is so inert and does not usually participate in corrosion? I know that it forms a protective oxide, but nothing explains why in an ...
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Why are the densities of europium and ytterbium anomalously low?

Why do europium and ytterbium have lower densities than expected in comparison to other lanthanides? I know it has something to do with the fact that they have half-full and full 4f subshells in the +...
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How does polydimethylsiloxane stick to glass?

Polydimethylsiloxane (PDMS) is the main ingredient in Rain-X, a treatment that adheres to windshields. How does PDMS adhere to class? It can't form covalent Si-O bonds with glass, according to one ...
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What is a stereochemically active or inactive s orbital?

In Concise Inorganic Chemistry by JD Lee (4th edition; adapted by Sudarshan Guha), page 73 under the section 3.6 (VSEPR Theory chapter Chemical Bonding): ...according to this theory, the position of ...
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Why doesn't tetraiodine exist?

I've run into a question that says after doing the Lewis structure of $\ce{IF3}$, which I did, explain why $\ce{I4}$ doesn't exist. I am confused as to how it can be explained. I've thought that ...
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Why is oxygen absorbed in a colorless alkaline solution of pyrogallol and why does it turn dark brown?

My book says: Oxygen is absorbed in colorless alkaline solution of pyrogallol and turns dark brown? I'd like to know why and how.
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What is the actual reason behind PCl₅ existing as an ionic solid?

Why does $\ce{PCl_5}$ exists in the solid state as $\ce{[PCl_6]^{-}[PCl_4]^{+}}$? What is the problem with it that it doesn't exist in its original form in solid state? Like why isn't it just $\ce{...
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Bonds within complex anions

Many groups of bound atoms complexively bearing a (negative) charge are called complex anions. Examples are $\ce{NO3-}$, $\ce{CO3^2-}$, $\ce{BO3^2-}$, $\ce{CrO4^2-}$, $\ce{Cr2O7^2-}$, $\ce{MoO4^2-}$, $...
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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{...
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Which has the largest bond angle between water, oxygen difluoride and dichlorine oxide?

Which one out of $\ce{H2O}, \ce{Cl2O}, \&\ \ce{F2O}$ will have largest bond angle? I think it should be $\ce{H2O}$ because oxygen is most electronegative in this case so electrons will be more ...
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Why is acidic hydrogen peroxide a potent oxidizer?

When hydrogen peroxide acts as an oxidizer it itself is reduced. Broadly this means that the peroxide bond is broken and that water is formed. However, why is there a tendency for hydrogen peroxide ...
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Molecular orbitals of heteronuclear diatomic molecules

For drawing MO diagram for heteronuclear diatomic molecule, how do I know which is lower in energy than the other? For example, given a heteronuclear diatomic molecule $\ce{NO}$, which one is lower ...
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Why is the 5d orbital instead of the 4f orbital filled in lanthanum?

For orbitals with the same value of $n + l$ (e.g. the $\mathrm{3d}$ and $\mathrm{4p}$ orbitals), we usually expect the orbital with the lower value of $n$ to be filled earlier. Hence, for example, the ...
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Inorganic chemistry reaction mechanisms

Are there well developed reaction mechanisms in inorganic chemistry like those in organic chemistry? If yes, please suggest an easy to follow reference.
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Why does ozone have an electrostatic potential map similar to that of SO2?

This is the electrostatic potential for ozone. This is the electrostatic potential for sulfur dioxide. (Click to enlarge) They look almost exactly the same except one is all oxygen atoms and the ...
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How can the solid state structure of cyclopentadienyllithium be explained?

In the solid state, LiCp adopts a polymeric multidecker structure where Li atoms are sandwiched between two Cp rings (shown in this diagram from Organometallics 1997, 16 (17), 3855–3858): If we ...
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Reaction of barium peroxide forming barium carbonate

I stumbled across this reaction: $$\ce{BaO2 + H2CO3 -> BaCO3 + H2O2}$$ This reaction seems quite similar to the variant with sulfuric acid $$\ce{BaO2 + H2SO4 -> BaSO4 + H2O2}$$ which is well ...
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Why doesn't oxygen replace chlorine?

If oxygen is more electronegative why doesn't it replace chlorine in compounds? Example: $\ce{2NaBr + Cl2 -> 2NaCl + Br2}$ works, while $\ce{4NaCl + O2 -> 2Na2O + 2Cl2}$ doesn't.

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