Newest Questions
47,367 questions
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Is descriptive data more valuable than inferential statistics for chemical analysis?
I'm working on a presentation where I'm discussing the importance of descriptive statistics, such as the mean and standard deviation, versus inferential statistics. The conclusion I've reached is that ...
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Question regarding usage of Baldwin's Rules in Questions
I was trying to apply Baldwin's Rule here but I don't know why it seems to work in one but not the other.
In the first one I think I have two options after formation on negative on oxygen. One the ...
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What is the MO diagram of cyclobutadiene when excited, and the reason behind Baird's Rule?
Can we use the MO diagram to explain why cyclobutadiene has aromaticity when excited(Baird's Rule)? Is it because when the molecule is excited, the two single electrons are forced to combine and make ...
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What is the evaluation order of sign and unit in chemistry quantities?
I am curious about the evaluation order when a chemistry quantity has both sign and unit, such as $+3.4\,\text{kJ}/\text{mol}$.
Because there is space between number and unit, I think $e = (+3.4) \, (...
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Does electric potential have a thermodynamic definition similar to other intensive properties?
I am wondering if there exists some general thermodynamic definition of what (electrochemical) voltage is. Many textbooks on the topic that I have encountered have simply adopted an operational ...
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Lassaigne's test for detection of nitrogen
Lassaigne's test is conducted for the detection of nitrogen, sulphur and halogens.
Unlike halogens, whose presence in any compound can be detected using this test, nitrogen can be detected only along ...
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Relation between coordination number and crystal field symmetry?
Like the title states: Is there a relation between the coordination number CN and the crystal field symmetry around the ion?
I deal with Ln(III) complexes with organic ligands (CN: 6, 7 and 8 ...
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What causes chemical shift difference in diasterotopic nuclei?
Specifically, I mean what physical phenomena contribute to the different shifts of diastereotopic nuclei and to what extent?
For example, in liquid-phase NMR, chemical shift is primarily determined by ...
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Why is potassium iodide such a common alkali-halogen combo?
Across lithium, sodium, potassium, fluorine, chlorine, bromine, and iodine, you have 12 combos of salts you can make. But it seems like out of these, I disproportionately encounter specifically sodium ...
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Comparision of Rate of SN2 reaction mechanism
In a given polar aprotic solvent, we are to estimate the relative reactivity of the following compounds.
Compound 1 is the ortho substituted and Compound 2 is meta substituted.
While the C–Cl bond ...
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Improve adhesiveness for copper
We are studying adhesives for laminating Cu foil. The adhesive consists of a curing agent and a base resin.
When functional group A is introduced into an elastomer used as the base resin (Tg = 100 °C ...
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Why would holding the electrodes for copper electroplating decrease the reaction rate?
One of my experiments gave this graph (Theoretical is just 2× current ×molar mass of copper ÷ Faraday's constant).
The only difference in the method for 0.2A is that rather than clipping the ...
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Relation between sign of electrode potential and oxidising/reducing nature of species
I'm a high school student of chemistry and in class today, our teacher taught us about electrode potential and corresponding oxidising/reducing nature. He told us that oxidation potential includes the ...
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Biperiden: Stereocenters and name
Biperiden
Wikipedia Germany writes (Google translation):
Biperiden contains three different stereocenters. Theoretically, there are therefore 2³ = 8 stereoisomers. The drug biperiden is a racemate (1:...
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What does it mean to be more electron dense and also slightly positively charged?
I don't understand the following sentence from Wikipedia — Carbon monoxide:
The molecule is therefore asymmetric: oxygen is more electron dense than carbon and is also slightly positively charged ...
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