Questions tagged [stability]
Applied to a chemical species, the term expresses a thermodynamic property in reference to a standard, stating that one state is lower in energy than another. The tag should be applied to questions seeking answers with respect to the stability (or instability) of a certain chemical species, molecular entity and/or electronic structure. It must not be applied to questions about the reactivity of particular chemical species.
572 questions
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What determines the stability of inorganic chloride-based acids?
The chloride ion forms strong anionic complexes with many metals. Well known examples include tetrachlorocuprate(Ⅱ) and tetrachloroaurate(Ⅲ). Many of these complexes are stable in aqueous solution, ...
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Mechanism of the thermal polymerization of styrene: What is the position of radical carbon?
In my book there is this depiction (the last step in first raw), but it's not clear to me how the initial secondary radical ends up on the shown tertiary carbon:
After step two, is there another (...
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Why is cyanide more stable than diatomic boron anion?
We typically consider the $\ce{CN-}$ ion because we need to fill its molecular orbitals, but in the case of $\ce{B2},$ we don’t apply the same reasoning. We know that $\ce{B2-}$ is unstable.
Why is $\...
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Drawing and finding number of resonating structures
In benzene- number of resonating structures are given as 2. Meanwhile in benzyl anion there are 5 resonating structure.
Why can't we make resonating structures in benzene like we did in benzyl anion. ...
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Why would this reaction occur?
My book has shown this reaction going through without any explanation.
Why would it go through? Isn't $\ce{S-}$ more stable than $\ce{O-}$ due to better distribution of charge on the sulphur atom?
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I failed to make Claus benzene. (With sticks.)
Claus benzene must be the nonplusultra of deformation stress. Every time I get a chemistry toolkit in my hand, I try to make it. But even with sturdy tetrahedral "stop tacks" and solid ...
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Aza analog of aminoxide
Let $\ce{Me=CH3}$. $\ce{Me3N+O-}$ (TMAO) is perfectly stable, no rearrangement to $\ce{Me2NOMe}$ (methoxyamine) occurs. What about $\ce{Me3N+N^-Me}$? $\ce{N-}$ moieties are much more unwilling to form ...
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Carbocation stability comparison between two molecule
How is carbocation in (A) more stable than (B), when (B) has conjugation and (A) doesn't.
(A) also has 3 three membered ring which is very unstable due to Ring Strain.
All the factors (all that i know ...
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What is the relation between DFT-calculated adsorption energy for a dye–fiber dimer and the concepts of stability, exothermicity, or endothermicity
I’m working on a DFT-based study of dye–fiber interactions. I calculated the interaction energy between a dye molecule and a fiber monomer by computing the total energy of the dye–fiber dimer and ...
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Why is Cr+3 more stable than Mn+2 in aqueous medium? [duplicate]
I had a question in my book which basically had us pick between Mn+2 and Cr+3 as to which one is more stable in aqueous medium. I dont really understand the basis of this comparison as Cr+3 is stable ...
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Does phenolphthalein crystallise as sodium salt?
The form of phenolphthalein I would encounter most often is a white solid that is soluble in moderately polar solvents (EtOH, DMSO,...) and the ethanolic solution is usually used as a pH indicator.
In ...
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Why salts of hypoiodous acid like sodium hypoiodite has not been isolated as solid yet?
We have sodium hypochlorite which is packaged commercially as bleach. We have sodium hypobromite which is sold as laboratory chemical. But we don't have anything for sodium hypoiodite. Apparently, it ...
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Schlenk equilibrium favored intermediate?
In organomagnesium chemistry, Schlenk equilibrium is essential to learn the reactivity of Grignard reagent. In the same link, I found the following figure which depicts the intermediate favored ...
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Can thermodynamic stability of hydrate/carbonyl be explained by kinetics?
For one of my thermodynamics courses, we had an assignment where we had to study the following dissociation/hydration equilibrium in water under the presence of $\mathrm{OH^-}$:
Additionally, we got ...
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The stability order in the substituted benzyl carbanions
What is the stability order in the following substituted benzyl carbanion?
Here, carbanion is getting stabilized by -I effect of Cl but also getting destabilized by +R. In the second structure due to ...
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