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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How to name HOOC-CH2-(C=O)-O-CH2-CH3?
How do we name the following compound according to IUPAC?
I do not have clearance on how to name Ester[R(C=O)-OR]'s prefix (like when are we supposed to use Alkoxy carbonyl, or Alkanoyl oxy) so if ...
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Usually double bond gets preference in numbering but what if triple bond is in a cyclo chain with more carbon atoms in cyclic part than in acyclic [closed]
I don't have anything to add, I am imagining a ring with four C atoms and a triple bond attached to a open chain with only 3 C atoms but with a double bond.
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Correct interpretation of Impedance: IR-Drop and Nyquist plots
Good day guys,
I have been lately studying impedance and IR drop in electrochemical systems.
From my readings I have come across different interpretations.
According to my books, from the Nyquist plot:...
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Doubt related to IUPAC nomenclature and RCOOX functional group [duplicate]
Does this compound exist?
If yes, then what will be its IUPAC name?
Also, what is the RCOOX functional group called?
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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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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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How can I draw 2,3-diethylheptane?
This question was given by my teacher in class:
Draw the structure of 2,3-diethylheptane.
So I drew the following:
But now if I name the compound according to the longest chain, it comes out to ...
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Organic compound nomenclature
As I learn nomenclature, I was told that -OH has higher priority than alkene. However, the last compound says otherwise. What is the key here?
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How to apply the Cahn–Ingold–Prelog priority rules to an isotopically-labeled molecule?
Is the following the correct designation (S) for the chiral carbon in a skeletal representation of 1-chloro(3-13C)butan-2-amine?
The CIP rules say to go one at a time by each rule until you find an ...
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Why is o used for hydroxy groups in IUPAC naming instead of saying 2-hydroxy [closed]
For this question, i marked compound II correct as 2-methylbenzaldehyde and got the question correct, but for compound I, i marked it wrong and suggested the name to be 2-hydroxybenzaldehyde. I got ...
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Are CAS numbers considered proprietary?
I’m interested in working with a large dataset consisting of CAS numbers and each corresponding molecule/chemical unit’s name. From my understanding, CAS Registry Numbers are assigned and stored by a ...
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How did Halogens become known as Halogens? They are not the only elements that form salts!
Having never given it a though before, I recently discovered (in a different context) that the prefix halo- actually means 'salt' or 'sea' and the suffix -gen means 'to form' or 'to generate'. So the ...
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Nomenclature for 5-Methylhepta-1,3,6-triene
I was practicing writing nomenclatures for several organic compounds with the help of Blue Book Essentials and I have some queries regarding the following structure:
According to the blue book, the ...
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How do I number the atoms in strychnine?
I know the basics of naming organic molecules, but this one is a bit more complex than I'm capable of. How can I number the atoms in strychnine?
Systematic IUPAC name: ($4$bR,$4$b$^1$S,$7$aS,$8$aR,$8$...
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Can someone help me name this molecule? [closed]
I'm having a hard time deciphering it's IUPAC name like I have 4-butanoxy and 3-propanoxy so far, but how do you put it all together with the double-bonded oxygen?
Thank you and really sorry for the ...
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How to name LiN(CF2SO3)2?
I found this compound in the list of inorganic lithium salts from this article on ScienceDirect.
It is said to be of the sulfonate group. Let's focus on the anion alone.
I'm not sure if it can be bis(...
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Confusion in the name of this organic compound
I think the name of the above compound should be 3-Ethyl-2-methylcyclohex-1-ene. However, according to my book (Organic Chemistry Resonance DLPD, page #43, question #5), this organic compound is 6-...
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Naming and structure of PtCl4.2HCl (complex/coordination compound)
Given that $\ce{PtCl4.2HCl}$ when reacted with excess of $\ce{AgNO3}$ produced zero moles of $\ce{AgCl}$, I understand that all the chlorine atoms are inside the coordination sphere. But what will the ...
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What is has a higher priority in naming organic compounds, alkyl groups or halides?
2-Chloro-3,3-dimethylbutane or 3-Chloro-2,2-dimethylbutane?
According to these sources, both are correct:
NIST/TRC Web Thermo Tables (WTT)
ChemSpider
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How to name an ester with an alkene or alkyne as the R group? [closed]
More specifically, see the image down below:
Would it be pentan-2-ene-3-yl propanoate? Do you just add the 2-ene to specify the position of the double bond?
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Is methylenecyclopropane a cycloalkene?
Are all compounds with a ring and double bonds considered cycloalkenes? Can the double bond be outside the ring in a cycloalkene (example: methylenecyclopropane)
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What is the priority of an alkyl substituent containing double or triple bonds, in comparison to the other functional groups?
If we have an alkyl substituent containing a double bond(s) or triple bonds(s), what is it's priority in comparison to other functional groups and substituents?
For example, take the compound given ...
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How the tertiary carbons of cyclohexane are assigned the stereo-descriptors (r)?
We assign the stereodescriptors R and S for chiral centres - carbons and other atoms, as per the set of sequence rules (CIP rules).
The pseudochiral centres are given the descriptors (r) & (s) ...
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How is the alpha carbon defined in alkyl halides?
The α carbon refers to the first carbon that attaches to a functional group. According to this information, the alpha carbon in 2-bromobutane should have been the carbon next to the one with ...
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How to indicate that a substance is in a standard state?
An superscript circle or Plimsoll is typically used to indicate that a thermodynamic property is that of a substance in its standard state. On the other hand, when writing a chemical equation we ...
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Nomenclature of C6H5CO-O-NH2
How to name the following compound using IUPAC nomenclature? I found benzyl carbamate to be very close to my structure, but couldn't find an exact compound online which matches mine.
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What is the correct name of H2SO2? Sulphoxylic acid or hyposulphuric acid [closed]
Given the oxidation state on S, it seems the correct name should be hyposulphurous acid, but I have seen multiple sources call it sulphoxylic acid, or both
What is the reasoning behind this ...
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What is "super" in superphosphate?
This question is inspired from a previous question(marked unclear). I don't know the context of that question but I was intrigued by a statement:
Superphosphate is used instead of just phosphate ...
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Is activated carbon classified as organic or inorganic?
Organic compounds are typically defined as “molecules containing carbon”. Wikipedia states that there for some historical (read: non-logical) reasons,
a few types of carbon-containing compounds ...
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Can SMILES name any possible chemical?
Similar: Does IUPAC nomenclature have the ability to name all organic compounds? - The answer to this question was no.
A relevant statement from the linked, though it is not explained:
The closest ...
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What do the dots mean in DABCO's IUPAC name? [duplicate]
I came across this molecule with the following IUPAC name: 1,4-Diazabicyclo[2.2.2]octane
What do the dots inside the brackets mean, or where can I read about the IUPAC guidelines that require this?
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How to name tricyclic hydrocarbons?
Recently, I read about the nomenclature of bicyclic compounds, by mentioning the number of carbons between two bridgeheads. But, then I came across the structure of a weird type of compound, whose ...
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Are CH₃COOH and HCOOCH₃ same?
Can I write the formula of Acetic acid as HCOOCH₃ or COOHCH₃ insted of CH₃COOH would they represent the same compound with same covalent bond?
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Why does phosphinic acid not form pyroacids?
Why does $\ce{H3PO2}$ not form pyroacids? All I know is pyroacids are derived oxyacids obtained by removing one $\ce{H2O}$ molecule from two molecules of oxyacids. Correct me if this is wrong.
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Translation of ferric and ferrous to German
I am not sure if this question belongs to the Chemistry or German forum.
My question is basically in the title. Are there good translations of ferric and ferrous to German which retain the meaning of ...
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Nomenclature of monocyclic molecule with multiple insaturation
The PIN (Preferred IUPAC Name) of this molecule
is (Z)-cycloocta-3-en-1,5-diyne, but at first I thought it was (Z)-cycloocta-1-en-3,7-diyne, following the rules of the Blue Book, P.31.1.3
Can someone ...
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If the substituents are distinguishable, is it possible to prioritize them using the CIP rules?
In the R/S stereochemical nomenclature,
when we try to determine the priority of substituents around a chiral carbon, are there specific examples where the ranking cannot be definie under the CIP ...
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What structure is this? [closed]
What is the name of this structure?
It's close to Leucine but I'm not sure.
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