Questions tagged [nomenclature]
This tag should be used for questions about the naming of compounds and elements, usually using systematic names according to IUPAC recommendations, but also using retained traditional names.
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What does the newest IUPAC nomenclature have against unsaturation?
IUPAC nomenclature 2013 changed a couple of rules very commonly used in naming simple acyclic compounds. As a result, depending on which nomencalture we choose, the answer to this question varies ...
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How to identify whether given element is meta(-ate) ion or meta(-ite) ion? [duplicate]
Like why $\ce{PbO3-}$ is a meta plumbate anion because definition of meta(-ate) ion is that it has maximum oxidation state of Pb by using minimum oxygens. But in this case how oxidation state of Pb is ...
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What's the correct name of this compound ..?
In an exercise for naming organic compounds, the compound shown below is named “3-ethyl-6-methylcyclohexene” in my textbook and even on Pubchem (https://pubchem.ncbi.nlm.nih.gov/compound/3-Ethyl-6-...
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Does folic acid contain a benzyl or a phenyl group?
I'm studying for my MCAT currently and I stumbled upon this question. It gives the structure of a folic acid molecule and asks what functional groups can be found within the molecule. I understand ...
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Is cyclohexane‐1,3‐dicarboxylic acid a correct IUPAC name?
I did the numbering by taking all the functional groups in principal chain (scheme A), but my teacher did it differently and proposed the name cyclohexane‐1,3‐dicarboxylic acid (scheme B):
The ...
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Why is it ACETone?
'Acet-' indicates ethyl, but does not offer two carbon atoms, but three.
Acetaldehyde is ethanal, acetic acid is ethanoic acid, but acetone is propanone (yes, I'm aware that there is no ethanone).
Why ...
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The nomenclature of mineral acids
My basic knowledge about nomenclature is: A mineral acid is called hypo when it has one less oxygen than the original one,
a pyro acid when 2 molecules of acid add up with release of $\ce{H2O}$
a ...
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Selection of parent chain in a halogenated compound with double and triple bonds
We were asked to select the parent chain for naming the halogenated compound containing double and triple bonds:
My teacher told me that we choose the orange (1) one over the blue one (3) because as ...
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Meaning of Cu1.5Al in Cu-Al phase diagram (I understand all other indexes incl. fractions like Cu0.75Al0.25)
I understand Cu0.75Al0.25 - that's just 75% Cu, 25% Al. I understand integer indexes - that's a normal chemical formula after all.
However, I have no idea how to interpret Cu1.5Al, I've never seen a ...
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why is alpha-linolenic acid "alpha"?
I'm learning about how fatty acid names are formed. In the process, I noticed a molecule called alpha-linolenic acid. There's a similar molecule called linoleic acid. Both have 18 carbons, but alpha-...
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Who defines the nomenclature of chemical elements in German?
I'm seeking the document which mentions the names of chemical elements in German. Some of them were changed in the past (e.g. Jod to Iod for iodine). IUPAC defines the standard name of elements for ...
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Naming alkanes with two branches in symmetrical positions [duplicate]
When naming an alkane with two substituents (e.g. methyl and ethyl branches), the carbon atoms in the main chain need to be assigned to lowest numbers possible. In the example in this link, why is the ...
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Why is this amine called this way?
I used a molecule drawing app to name the compound in the image, an amine. The name of the compound is 3-(aminomethyl)hexane according to the app. Shouldn't the name be 2-ethylpentan-1-amine?
The ...
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What word is to chalcogen and pnictogen as halide is to halogen?
Would "chalcide" be understood as a group 16 dianion (and something less electronegative)? Would "pnictide" be understood as a group 15 trianion (and something less electronegative)?
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What should be the IUPAC name of [(NH3)5Co-NH2-Co(NH3)4(H2O)]?
What should be the IUPAC name of $\ce{(NH3)5Co-NH2-Co(NH3)4(H2O)]}$?
This is similar to $\ce{[(NH3)5Co-NH2-Co(NH3)5](NO3)5}$, i.e. μ-amido-bis[pentaamminecobalt(III)] nitrate. But the two parts are ...
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