The naming of molecules and elements, usually according to IUPAC standards, but also the accepted uses of traditional ones.

learn more… | top users | synonyms

2
votes
1answer
25 views

How would I name O-methylations on sugars while retaining the sugar’s common name?

Suppose I had a monosaccharide, e.g. D-arabinose. Suppose I do a few synthetic steps with it, and end up with the compound methyl (2S,3R,4R)-3,5-dihydroxy-2,4-dimethoxypentanoate. (as labelled by ...
3
votes
0answers
35 views

Definition of an amide

If I asked you to draw me an amide, we'd likely end up with something in the form of: The exact definition of this is given fairly clearly in the IUPAC gold book. Derivatives of oxoacids [...] ...
0
votes
1answer
41 views

Is chloronitrobenzene and nitrochlorobenzene same?

Is it 2-chloronitrobenzene or 2-nitrochlorobenzene? If we take nitro group as the substituent, it will be 2-chloronitrobenzene. But if we take chloro group as the substituent, it is ...
3
votes
2answers
60 views

Amine Nomenclature – When to use “N”

I'm currenty wondering what the correct naming scheme for the following molecule would be: Is this called "2,N,N-trimethylpropan-1-amine" or "2-methyl-N,N-dimethylpropan-1-amine". In other words, do ...
1
vote
1answer
31 views

Naming Organic Compound

How should I name this? 1,1,1-tribromo-2,2-dichloroethane or 2,2,2-tribromo-1,1-dichloroethane ?
4
votes
2answers
34 views

How to name the tautomers of hexane-2,4-dione correctly according to IUPAC rules?

Today I was considering to answer the question "Which tautomer of hexane-2,4-dione is more stable?" I wanted to run a few calculations and while preparing a directory structure I wanted to make sure ...
4
votes
1answer
86 views

What is the difference between D and L configuration, and + and -?

What is the difference between D and L configuration, and + and -? My textbook says they are two different things. It also says that the correct way to name glucose is D(+)-glucose. Could someone ...
5
votes
2answers
87 views

The naming of benzene

Why is benzene not called as a cyclo triene? Wikipedia says benzene is a IUPAC name, but isn't it a common name?
0
votes
1answer
35 views

Naming amitriptyline by IUPAC [closed]

Can someone guide me through step by step how amitriptyline is named by IUPAC? I know the name per se, but it is very confusing to me, and I'd like someone to explain it to me. The systematic name is ...
0
votes
0answers
14 views

IUPAC Name of n-propyl benzene? [duplicate]

What is the IUPAC name of n-propylbenzene? Is it propylbenzene or 1-phenylpropane. Which entity should be taken as substituent? Going forward: What is the general nomenclature of alkyl benzenes? Any ...
1
vote
1answer
40 views

If there is more than one branch in a hydrocarbon, which branch do you name first?

I have read that branches need to be named in alphabetical order, but I do not really understand this, or do you start with the branch closest to the edge of the hydrocarbon?
1
vote
1answer
32 views

When naming hydrocarbons, when do you number the branch or double bond? [closed]

I have realized that not all chains and double bonds are numbered. I have noticed that up until 3 carbons in a chain, the double bond is not numbered, but I am not sure about the chain.
5
votes
1answer
87 views

What is the use of “pyro” in the naming of organic compound?

Recently I asked a question on the naming of polyhydroxy phenols. One of them was pyrogallol (1,2,3-Trihydroxybenzene) which is synthesized from gallic acid obtained from oak galls. (BEWARE- not a ...
3
votes
2answers
84 views

Can there be two IUPAC names of a compound?

What is the difference between propan-2-amine and 1-methylethanamine?
0
votes
1answer
23 views

5-Chloro-2-Methylphenol vs 2-Chloro-5-Methylbenzene?

Why is the compound called 5-Chloro-2-Methylphenol rather than 2-Chloro-5-methylphenol? The occurence of the highest number 5 is exactly the same, so are they both correct?
11
votes
2answers
634 views

Why is this compound named resorcinol?

Substituted phenols or polyhydroxy phenols have their general name apart form IUPAC names. The general names comes from the source it is found like:- Catechol (1,2-dihydroxybenzene)- obtained from ...
0
votes
0answers
31 views

Problem in understanding 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 H2Oa meta acid ...
4
votes
0answers
16 views

Is there a broader nomenclature convention to explain why the a in chlorophyll a is italicized?

By convention, the letter that specifies which side chain a chlorophyll molecule contains is italicized: for instance, chlorophyll a. Does this convention stem from any broader principle of chemical ...
15
votes
1answer
711 views

What is the meaning of the “-osic” suffix on a metal (e.g., cobaltosic oxide)?

I just came across the term cobaltosic for the first time in the abstract of Ind Eng Chem Res 52(18): 6076, 2013 (emphasis added): A nanocomposite of cobaltosic oxide and nitrogen-doped graphene ...
4
votes
1answer
190 views

Naming a 4 branched cyclic compound

If this compound exists, what will be its name? Can it be called bicyclo[9.2.2.2] hepta-decane ?
1
vote
1answer
43 views

Carbon numbering in carbohydrates

Carbons have been numbered differently in two different pictures. What are the rules of carbon numbering?
0
votes
0answers
43 views

Logic in amount of H and O in acid

I tring to learn acids and salts. I absolutly got idea of:"hypo,ous,ic,per and ate with ite" but couldnt feel any logic in what ratio must the $\ce{H2}$ and $\ce{O2}$ be used, moreover I am very poor ...
1
vote
1answer
41 views

How can I find the parent chains in these two compounds?

We recently started organic chemistry in school and I decided to make a computer program that names the compounds, so far it works with alkanes that do not have branched branches and I want to make it ...
1
vote
1answer
34 views

In which cases do you say “oxide” when naming a molecule?

Based on the names of following molecules I got quite confused about the correct nomenclature: $\ce{NaHCO3}$ $\ce{K2SiO3}$ $\ce{PbCrO4}$ In none of the above molecule names you ever say "oxide" ...
0
votes
2answers
32 views

Why is it lead(II)chromate and not Lead(II)Chromate(VI)tetraoxide?

I am just beginning in chemistry and learning how to name the different molecules. I have this molecule: $\ce{PbCrO4}$ I would give it the following name: Lead(II)Chromate(VI)tetraoxide Lead and ...
6
votes
2answers
104 views

Name of an unsaturated cyclic compound

I got stuck while doing some exercise of naming organic compounds. I deduced the name as cyclodeca-1,6-dien-3-yne Is it correct?
1
vote
0answers
17 views

Why we use -adien- / -atrien- infixes if we need to indicate double bond positions with numbers? [duplicate]

For exemple: instead of Buta-1,3-diene why we don't use but-1,3-ene. In my mind, there would be no confusion when using the nomenclature that way because we use one number to indicate the position of ...
0
votes
0answers
26 views

Priorities IUPAC [duplicate]

I have an exam tomorrow. I have a problem with name aromatics compounds. I suspect there is a priority list(chart) that we should follow on putting numbers on each branch of the benzene cycle. ...
10
votes
1answer
264 views

Cubane systematic name

Why is cubane called $pentacyclo[4.2.0.0^{2,5}.0^{3,8}.0^{4,7}]octane$? I am especially intrigued by the pentacyclo part.
6
votes
2answers
294 views

Is the name of this chemical 3-oxopropanoic acid?

Is the name of this chemical 3-oxopropanoic acid? I included "oxo"- for the aldehyde group, and "-oic acid" for the carboxylate group. However, I'm unsure whether this is the correct name since I ...
8
votes
1answer
93 views

Why was Lawrencium's symbol changed?

The initial proposal by Lawrence Berkeley National Laboratory scientists for naming element 103 was "Lawrencium" with the symbol "Lw", However, while IUPAC accepted the name "Lawrencium" for the ...
5
votes
0answers
48 views

ammine V.S. amine

In nomenclature of complex salt we use ammine for NH3 instead of amine. I thought it was to differentiate between Ammine ligand and amine in organic ligand(like en). But Wikipedia says it has some ...
5
votes
1answer
53 views

Cis and trans substituents on rings different stereodescriptors

The attached two compounds are diastereomers. They can be differentiated by cis/trans descriptors. Is there another way of describing them as cis/trans seems to be outdated? EDIT: How to determine ...
3
votes
1answer
33 views

Unsaturated alcohol configuration

The molecule is such: My working is such: But my supervisor said the molecule is actually R configuration. Could someone please explain this and tell me where I went wrong?
4
votes
2answers
115 views

Nomenclature of spiro compounds

Does the nomenclature of spiro compounds follow the same pattern as that for bicyclo compounds? That is, in absence of functional groups do we start form the largest chain to the smallest chain. What ...
2
votes
1answer
78 views

Does CH3CHNH exist, and what is it called?

I am drawing different Lewis Structures of small compounds containing nitrogen, hydrogen, and carbon. One permutation is $\ce{CH_3CHNH}$, but I have never heard of this compound. Initially, and ...
8
votes
1answer
102 views

Help understanding the IUPAC Systematic name of Carminic Acid

Every IUPAC Systematic name I have come across, I have understood up until now. This is Carminic Acid (C22H20O13): This is the IUPAC Systematic Name for Carminic Acid: ...
0
votes
1answer
21 views

nomenclature of some organoselenide moieties [closed]

what are the structures of these selenide moieties : selenenylate, selenolate ? Can anyone tell the difference between the two in the terms of if they are anions or cations , electrophiles of ...
0
votes
1answer
50 views

What is the correct way to pronounce iodine?

I have always said it like 'io-deen' because whenever 'ine' is used (eg. amine, or flourine) it is said that way. Sometimes I'm corrected by people who think it should be pronounced 'io-dyne', which ...
3
votes
1answer
56 views

How is a side-group that contains a double bond named?

In my chemistry lecture, we are working on the naming and nomenclature of organic molecules. When we got to the naming of alkenes and alkynes, we were told that the functional group had to be in the ...
0
votes
1answer
21 views

Nomenclature of Organic Compound from Condensed Formula [closed]

I am just unable to name $\ce{C6H5CH2C6H5CH2C6H5}$ using IUPAC nomenclature. I tried searching online however I couldn't find a name for it.
2
votes
2answers
102 views

What's the name of this organic compound?

There's an exercise that requires me to correct the names given to a set of molecules. Basically I should check for the longest Carbon chain. I bumped into 2,2,6,6,7- pentamethyl-octane. I first drew ...
0
votes
1answer
107 views
1
vote
3answers
56 views

How do I call the functional group of this alkane?

Given the following chain of carbon atoms (imagine they are all saturated with the correct number of hydrogen atoms), how do I call it? 4-(dimethyl-ethyl)-octane? I'm having trouble naming the short ...
3
votes
1answer
43 views

Why does FeO(OH) have two CAS numbers?

Iron(III) oxide-hydroxide, $\ce{FeO(OH)}$ has two CAS numbers, 1310-14-1 and 20344-49-4. What's the difference between them? Why does it have two CAS numbers? As I know, the CAS number should be ...
2
votes
1answer
44 views

What would carbon-oxygen polymer be called?

So I have a chain molecule made of carbon and oxygen, and I'm not sure what it would be called. Would any of you lovely fellows be able to help me? The best name I've been able to come up with so ...
5
votes
2answers
304 views

What does the prefix meta mean in inorganic chemistry?

In inorganic chemistry, when is the suffix meta used? (as in metaborate and metasulphite) What about the terms pyro and ortho (as in orthophosphorous acid)? For example, I recently came to know about ...
2
votes
1answer
98 views

What is the meaning of the prefix “per-”?

The prefix "per-" appears in the names of many compounds, such as in perchlorate, persulfate, peroxide. What does it mean?
1
vote
2answers
45 views

Are `dTDP-4-dehydro-6-deoxy-alpha-D-galactose` and `dTDP-4-keto-6-deoxy-D-glucose` the same thing?

Are dTDP-4-dehydro-6-deoxy-alpha-D-galactose and dTDP-4-keto-6-deoxy-D-glucose the same thing? I am looking for the function of ...
3
votes
1answer
91 views

Priority when naming benzene derivatives

I've been playing around with chemdraw and found that it assigns the priorities of substituents in a way I wouldn't have expected. I'm not a nomenclature buff, so I'd like to know if it's correct and ...