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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5
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1answer
98 views

IUPAC Nomenclature of a dioic acid

I have to name the following organic cpd according to IUPAC. My attempt: I am unable to select a parent carbon chain as there are 2 carbon chains possible and I don’t know how do we proceed in such a ...
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2answers
1k views

What is the name origin of ester?

Ester is quite a random nomenclature for a compound derived from a parent acid and parent alcohol. Is there any reasoning behind using the word 'ester' to name such compound (for memorising purpose)? ...
6
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1answer
252 views

Nomenclature of unusual nitrogen functional group

I am trying to create a proflavine derivative containing a 1,2,4-oxadiazole-5-one functional group, the first step produces an interesting functional group that I have no idea how to name: $$\ce{[Pro]-...
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3answers
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What do (2S,3S) and similar notations mean?

When my textbook is discussing stereoisomers with more than one chiral centers, it's using notation like (2S,3S) being an enantiomer with (2R,3R) and so forth. I understand R and S configuration, and ...
4
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2answers
134 views

Transition metal chalcogenides

According to wikipedia, a chalcogenide is a chemical compound consisting of at least one chalcogen anion and at least one more electropositive element. In the same sense does transition metal ...
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1answer
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Anthracycline nomenclature - doxorubicin [closed]

Why $\ce{-OCH3}$ is Number 3? I think that $\ce{-OCH3}$ Appropriates Number one.
8
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1answer
557 views

Assigning R/S configuration

Question: Assign the R/S configurations to the carbons which are attached to different rings of this molecule (carbons 1 and 3 according to IUPAC numbering): My Solution I first started out by ...
6
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2answers
185 views

How is nomenclature decided in this case (formyl vs oxy)?

I was asked the IUPAC Name of the following compound in JEE Mains (2nd September, Shift 1) 2020. There were two names occuring to me: 5-formyl-2-methyl-hex-2-enoic acid (2,5)-dimethyl-6-oxo-hex-2-...
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1answer
149 views

For IUPAC nomenclature, does the number of multiple bonds take precedence over the chain length?

I've received a few mixed answers to this question. Some sources say when determining the parent chain for unsaturated hydrocarbons, the longest chain should be considered before the chain with the ...
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API for molecular classification

We would like to identify an application programming interface (API) which can be fed a SMILES string, PubChem CID, IUPAC name or equivalent, which returns a set of strings corresponding to molecule ...
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1answer
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Nomenclature of K2(PdCl4) [closed]

In the compound $\ce{K2[PdCl4]}$, the oxidation state of Pd is +2 so as per the nomenclature rules, the name of the central metal inside the coordination is simple if it's a cation. So if we name the ...
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190 views

How to name this compound (Carboxylic acid+amide)?

It's the first one, I know that this solution is a mistake, but what is the true one? can we just use 5-amido?
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1answer
177 views

Polymerisation of a UV-curing resin

I have a photosensitive resin MSDS. It lists a mixture of 1,6-Hexanediol diacrylate ($\ce{C_{12}H_{18}O_4}$) with its proper CAS number and Polyurethane acrylate together with the CAS number of "...
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1answer
88 views

Alphanumeric preference between hexyl and heptyl

Our chemistry teacher taught us that hexyl (five letters) is preferred to heptyl (six letters) as hexyl has lesser number of letters. After searching many sources I could not find any such rule. Which ...
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2answers
100 views

why is NaClO 'liquid chlorine'?

Sodium hypochlorite. $\ce{NaOCl}$. Appears to be: one part sodium, one part chlorine, one part oxygen. Five questions: Couldn't it just as easily be 'liquid sodium' or 'liquid oxygen'? It's not ...
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3answers
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Is benzene a polymer of ethyne?

In one of my classes, my teacher told me that benzene can be formed by cyclic polymerization of ethyne. But I think that benzene isn't a polymer because only 3 ethyne molecules are combining to form ...
4
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1answer
168 views

Having trouble naming hydrocarbons with the IUPAC nomenclature rules

First of all, thanks a lot for taking the time. I'm homeschooling and don't currently have any proper teachers, so I thought this would be a good place to ask. Its an easy question I think, but it has ...
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1answer
1k views

Is tertiary-butyl same as neo-butyl?

By definition neoalkanes have two-times branching of methylgroup at second last carbon. But in no book which I could find, it is not alternatively named as neo-butyl. Is the definition right, or am I ...
2
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1answer
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Shouldn't this compound be called 2-methyl-5-(1,2-dimethylpropyl)nonane?

The book says that the name should have dimethylpropyl methyl nonane in that order. Shouldn't the methyl group come first since methyl comes before methylpropyl (in the alphabetic order)? Our prof ...
1
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1answer
279 views

ᴅ-amphetamine, ʟ-amphetamine

The following structural formula (source: Wikimedia) is labelled ᴅ-amphetamine: A Fischer projection of this molecule would contain, I think, the following line: $$\ce{H2N-C-H},$$ and I would have ...
12
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1answer
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R/S configuration of bridging carbon in bicyclic system

I am trying to figure out the R and S configuration of bridging carbons in bicyclic systems. In the image, there are two bicyclic systems and depending on the position of the Br substituent, the R or ...
0
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1answer
146 views

Naming a given organic compound according to IUPAC naming rules

Would the given organic compound be called "3,4-diethyl-3,7,7-trimethylnonane" with IUPAC naming rules? I don't really know if this should be called 3,4-diethyl-3,7,7-trimethylnonane, ...
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4answers
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How were urolithins discovered and named?

Urolithin is a product of the degradation of ellagic acid by gut flora and has significant biological activity. (Wikipedia) I am curious as to how it was discovered but cannot find the story. Although ...
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2answers
158 views

Cis-trans isomerism with electron pairs [closed]

Is it possible to name compounds with lone pairs on the double bonded species using the cis-trans nomenclature? For instance, can't you name $\ce{Ph-N=N-Ph}$ by the relative position of the nitrogen ...
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2answers
576 views

Conversion of molecular structure into Fischer projection for compounds having more than two chiral carbons

Question What is the Fischer projection of the given compound's enantiomer? Answer My attempt I tried to solve this by first converting it into the Fischer projection of the given compound and then ...
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1answer
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Absolute Configuration in Stereochemistry [closed]

I got all the rules of writing RS nomenclature for Perspective formula of chirality center only problem being, I m confused that given compound can have any configuration depending on how I write the ...
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93 views

Nomenclature of halogenoalkanes

Why is the following compound called "1,1,1-trifluoro-2-chloro-2-bromoethane"? Why is this not called "1-bromo-1-chloro-2,2,2,trifluoroethane" alphabetically? (the name, 1,1,1-...
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0answers
162 views

Name for H2O- radical? (H2O+ radical is Oxoniumyl)

Radical are atoms with unpaired electrons, and they have short lifetimes because the unpaired electrons are highly chemically reactive. The $\ce{H2O^{.+}}$ radical is named oxoniumyl. Is there a name ...
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1answer
109 views

How to write the formula of a mixed metal salt?

I suppose the formula of the Sulphate salt of Sodium & Potassium is $\ce{KNaSO4}$ as the Pubchem site says so. So, is there any rule that in the formulae such mixed metal salts we need to write ...
4
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1answer
216 views

TKN: Why are they called Missouri tablets?

When analyzing for Total Kjeldahl Nitrogen (TKN), you can make a copper sulfate digestion solution in the lab or purchase a variety of pre-prepared digesting tablets for example on VWR. My question is,...
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Understanding formulas for PZT

In the slides i'm studying (about the production of PZT), is given the following formula for lead zirconate titanate : $$\ce{PbZr(Ti)O_3}$$ with the explanation: It is a solid solution of two oxides: ...
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1answer
350 views

Why is H5PO5 not called as phosphoric acid? [closed]

Recently, my course of inorganic chemistry has begun, and in the nomenclature of inorganic acids, our professor told that phosphoric acid is $\ce{H3PO4}$ and phosphorous acid (orthophosphorous acid) ...
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1answer
77 views

What is the name of this compound? [closed]

This doesn't look like an amide. What is its IUPAC name? Is this compound even possible?
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1answer
98 views

Naming a synthetic molecule from QM9 dataset [closed]

I was trying to write a name for a synthetic molecule in QM9 dataset. The molecule is: is 3-aminooxolane-2-carbonitrile a correct name for this?
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1answer
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Why Peroxydisulphuric Acid is also called as Marshall's Acid and Peroxymonosulphuric Acid as Caro's Acid? [closed]

I recently come across the oxaacids of Sulphur and got to know to Acids, $\ce{H2S2O8}$ and $\ce{H2SO5}$ as Marshall's Acid and Caro's Acid respectively, but I am just eager to know why they are named ...
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Why is this compound named (Z)-but-2-ene-1,1-diyldibenzene and not (Z)-1,1-diphenylbut-2-ene

A recent answer of mine involved the synthesis of the following compound: I initially assumed the name of this compound to be (Z)-1,1-diphenylbut-2-ene as the butene is the main chain, with two ...
14
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3answers
2k views

Can geometrical isomers be enantiomers?

I have just been pondering upon the question above. I have found this example and I am sure they are enantiomers, but do they also count as geometrical isomers?
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1answer
370 views

When we name an organic compound ,if there is double bond and a functional group which is now a substituent who has priority? [closed]

For example if a particular compound contains carboxylic acid, alcohol and double bond and the compound is such that we can either include double bond or alcohol in the main chain then who has ...
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60 views

E-Z system without a double bond

Can we apply E-Z nomenclature to geometrical isomers without a double bond. For example, can we use it for cis and trans isomers of 1,2-dimethylcyclohexane?
4
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1answer
505 views

What do 'sigma' and 'pi' in front of ligands in the formula of a coordination compound mean?

The following coordination compound was given in the book Concise Inorganic Chemistry by J.D. Lee (Adapted by Sudarsan Guha) under the topic 'Effective Atomic Number (EAN)': $\ce{[Ti(\sigma -C5H5)2 (\...
6
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1answer
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Naming of [Pt(py)4][PtCl4]

Why is $\ce{[Pt(py)4][PtCl4]}$ called tetrakis(pyridine)platinum(II) tetrachloridoplatinate(II) and not tetrapyridineplatinum(II) tetrachloridoplatinate(II)? I thought you use tetrakis for ligands ...
4
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1answer
137 views

IUPAC nomenclature of protonated aminoacids

What is the IUPAC systematic name for the above compound. So I know that carboxylic acids have highest priority. Now the length of carbon chain is 7. So I think the name should be 7-ammonioheptanoic ...
5
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1answer
83 views

What is the naming convention for Sn and Pb in inter-metallic compounds?

How would one go about naming inter-metallic (specifically, transition post-transition) compounds containing tin and lead? It is usually easy figuring out the naming of such compounds as they follow ...
9
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1answer
294 views

Prostaglandin Nomenclature

Prostaglandins are lipid substances derived from fatty acids, which act as powerful biochemical regulators. In Wade's Organic Chemistry, they indicate that there are several families of ...
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Naming terminal monosubstituted alkenes conformations [duplicate]

Alkenes can be described by E/Z nomenclature and cis/trans nomenclature. However, is there a way to name alkene conformations which are monosubstituted? For example, how could one describe the ...
2
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1answer
309 views

Can you call H_2 an Atom? [closed]

I am currently studying to complete the Chemistry CLEP exam, I ran into this question and was thoroughly confused by the phrase 12.04x10^23 atoms of H_2 According to the question, this corresponds ...
0
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1answer
63 views

Where to put the number in organic nomenclature? [closed]

Should one write 4-hydroxypentan-2-one or 4-hydroxy-2-pentanone? It has been seen that both have been used frequently.
0
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1answer
345 views

What should be the name of this compound containg both double and triple bond?

Which is a more correct name, according to IUPAC nomenclature: pent-2-ene-4-yne, or pent-3-ene-1-yne?
3
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1answer
510 views

Naming substituted bicyclo compounds

I have to name the above compound. I am getting 5-bromo-2-chloro-7-fluorobicyclo[2.2.2]octane. But my teacher is telling me that the answer should be 2-bromo-5-chloro-8-fluorobicyclo[2.2.2]octane. His ...
5
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0answers
280 views

The IUPAC name of a multifunctional carboxylic acid compound

What is more preferred name when ester is present as junior functional group bis-carboxylic acid? (refer the image attached): to count carbon of ester and consider two branches on it (one oxo and ...

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