Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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.

5
votes
1answer
77 views

What chemicals have been named after Star Wars characters?

The molecule below is whimsically named Yoda1 because it "uses the force" to open channels in a class of animal proteins known as piezo ion channels (which appear to be part of their pressure sensing ...
2
votes
0answers
17 views

What is correct cyclopenta[a]phenanthrene numbering?

IUPAC BlueBook 2013 states: P-25.3.3 Numbering fused ring systems Fused ring systems with retained names, systematic names, or fused names are systematically numbered in the same manner. ...
-1
votes
0answers
27 views

Nomenclature of organic compound? [closed]

Is the naming of compounds are correct?
1
vote
1answer
20 views

Nomenclature of Coordination compounds containing nitrogen

As Per rules , amine when present as a ligand is written as "ammine" with double m's , so a compound having a complex ligand such as ethane-1,2-diamine , will be written with 1 'm' amine or double 'm' ...
4
votes
1answer
33 views

Lowercase “a” in organic chemistry nomenclature?

In the IUPAC name for geosmin has a lowercase a mixed into it: (4​S,4a​S,8a​R)-4,8a-dimethyloctahydronaphthalen-4a(2​H)-ol. Does anyone know what it stands for or can reference me to a source that ...
-1
votes
1answer
18 views

Oxyanionic Series and Chemical names [closed]

If there is only 1 Oxyanion in a series, what is it’s prefix/suffix? Also, if I have Copper(I) Iodate, how do I know how many oxygen atoms are in the compound?
1
vote
1answer
36 views

Which are the radicals containing phosphorus in ATP?

The ATP molecule contains 3 $\ce P$ atoms linked through esteric bonds. The IUPAC name of triphosphate adenosine is "[[(2R,3S,4R,5R)-5-(6-aminopurin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-...
-1
votes
0answers
35 views

IUPAC name of OHC-CH(CH3)-COOH [duplicate]

common name of the above structure is alpha-Formylpropionic acid. In my text book IUPAC name is given 2-methyl-3-oxopropanoic acid. My query is why formyl is not used in IUPAC name ? There substituant ...
-2
votes
1answer
39 views

Vinyl vs Acryl IUPAC Usage [closed]

I have read that the word Vinyl and Acryl, both refer to the same group. The difference is that Acryl is used for naming when the functional group attached itself contains a carbon atom while Vinyl ...
1
vote
0answers
49 views

Inorganic IUPAC for Compounds with bridged ligands?

Can we use bis(tetraammine) instead of octaammine is the 2nd example ? As in the 1st example they used bis(pentaammine) and also in the 3 one the used bis(carbonylcyclopentadienyliron)
0
votes
1answer
30 views

Nomenclature in case when same fucnctional group is present more than once

here since Only CN group is present, it is the major functional group. In this molec. we cannot have a chain which has carbons of all CN group. hence in such compounds we do not take any carbon of cn ...
0
votes
0answers
14 views

Are both these names correct for given structure [duplicate]

(2R,3S)2,3dibromobutane And (2S,3R)2,3dibromobutane
3
votes
0answers
61 views

IUPAC name for branched alkane

I'm trying to apply IUPAC rules to name the compound below. TLDR: Why is this 3-ethyl-2,3,4-trimethylpentane and not 2,3-dimethyl-3-(1-methylethyl)-pentane? Is this the correct source to use? ...
0
votes
0answers
24 views

Octa-4,6-dien-2-yne or Octa-2,4-dien-6-yne?

I read in my book that if the least sum rule is same for both double bond and triple bond then we give double bond priority. According to that the 2nd name should be the correct one where lowest ...
5
votes
1answer
847 views

What is the correct name of 3-isopropyl-4-methylhexane?

In the branched alkane shown above, I've been told that 3-isopropyl-4-methylhexane is supposedly the correct name. However, in the alternative numbering scheme on the right, the parent chain is still ...
0
votes
0answers
38 views

Does the numbering of a side chain always start at the C bound to the main chain?

I just read different rules for preferred IUPAC naming from different sources and would like to know the actual recommendation. The question is about finding the main part of a side chain. (1) This ...
-1
votes
1answer
58 views

IUPAC names of imines [closed]

How to write IUPAC name for this imine compound?
-1
votes
1answer
32 views

Why is 5-(aminomethyl)-3-ethylheptan-2-ol named so?

Why is 5-(aminomethyl)-3-ethylheptan-2-ol named so and not 6-amino-3,5-diethyl-heptan-2-ol? I.e why is the amine part not taken in the longest chain since it is a functional group with a definite ...
1
vote
0answers
47 views

Help with naming molecule

I am trying to name the molecule pictured below. I thought it would be 5-bromo-4-isopropyl-2-methylhex-2-ene, but googling that name does not show any results, which makes me think it is not right. ...
0
votes
1answer
33 views

Why is diazobenzene named so and not phenyl diazobenzene?

I have searched for this answer for a long while but haven't got it. Why is diazobenzene named so and not phenyl diazobenzene or something? The group with two bonded nitrogens is the diazo group. Why ...
3
votes
2answers
75 views

Doubts on IUPAC name 1,1'-methylenebis(4-isocyanatobenzene)

Wikipedia states IUPAC name of the above compound as 1,1'-methylenebis(4-isocyanatobenzene) . I have a confusion. Shouldn't isocyanate group be given preference over the methylene group? I assume ...
3
votes
1answer
234 views

How should you name the solid-solution compound ScY(SeO4)3?

How should you name the compound $\ce{ScY(SeO4)3}$? There are 2 cations, and I know that $\ce{SeO4}$ is a polyatomic ion with $-2$ charge. However, I am unsure how to proceed.
2
votes
2answers
49 views

Nomenclature confusion regarding carboxylate and ester

I suddenly thought about these 2 compounds that seem to have the same name. Aren't both of them methyl propanoate? How do we differentiate them apart name wise?
-2
votes
1answer
60 views

IUPAC Name for the following? [closed]

Need help with the IUPAC name for the following line structure.
6
votes
1answer
342 views

Rules of naming ionic compounds

While brushing up on my Chemistry basics, I came across a topic about naming ionic compounds. It is a question regarding Roman numerals. It says "Roman numerals should not be included in the name ...
1
vote
1answer
78 views

Numbering in IUPAC name of a trisubstituted cyclohexane

This is the organic compound. CHO - aldehyde group. Br - Bromine How do name this organic compound (IUPAC Standard)? Specifically, how do you number the carbon atoms? I thought the answer was 1-Bromo-...
0
votes
1answer
24 views

IUPAC Name clarification [closed]

$\ce{CH3-CH(F)-CH2-CH2-CH(C2H5)-CH2-CH3}$ Will the correct IUPAC name be 3-ethyl 6-fluoro heptane or 5-ethyl 2-fluoro heptane?
-1
votes
1answer
48 views

IUPAC Nomenclature of the organic compound(See Picture) [closed]

Question:IUPAC nomenclature of the given organic compound Given answer is Option 4
9
votes
1answer
397 views

What is [U-14C]-glucose?

In Helen Tweeddale's article,[1] they labelled metabolites of E. coli with [U-$^{14}$C]glucose. What sort of glucose is it? I understand they used isotope 14, which is radioactive but what does the U ...
2
votes
0answers
45 views

Does this particular molecule (pyridine-I-pyridine) have a common name?

Here's a pic of the molecule: I've been investigating this system to test a computational chem method, but I've realized I don't really know a name for this system. $I-pyr_2$? $py_2I$? In my mind I ...
1
vote
2answers
50 views

Nomenclature of the following aromatic compound

What is the name of the compound $\ce{(C_6H_5)-CH=N-CH_3}$ ? I doubt, it is n-methyl benzalamine . Is it correct ? Besides , what could be other names of it?
0
votes
2answers
105 views

Confusion in IUPAC Nomenclature

I was trying to name the following compound but I got stuck in naming the aldehydic part of the compound. I looked for the answer and found it as 6-bromo-2-oxocyclohexanecarbeldehyde. I had come to ...
15
votes
1answer
182 views

IUPAC name of C₆(CH₃)₆²⁺

What is the correct IUPAC name (or least incorrect one, if the current rules can't precisely describe that) of the interesting species $\ce{[C6(CH3)6]^{2+}}$ (which is extensively discussed here), ...
2
votes
1answer
87 views

IUPAC Nomenclature for aldehyde

I was trying to name the following compound and I thought that if both the aldehyde group carbons should be included in the parent chain or I should go with the longest chain . I saw the solution for ...
3
votes
1answer
87 views

What is the chemical name of this derivative of aniline?

What is the chemical name of the following compound? $$\ce{(C6H5)-N=CH2}$$ I doubt that it might be N-phenyl methanal oxime . But , it can't be oxime of OH ion is absent. What would it be?
-2
votes
1answer
51 views

IUPAC naming of alkyl halide

Why is 4-Bromopent-2-ene correct but 2-Bromopent-3-ene not correct by IUPAC nomenclature? I don't see anything wrong in the second case. Which rule does it violate? Note that I am naming ...
0
votes
1answer
63 views

IUPAC nomenclature of chelates

I could finally get a copy of the Red Book 2005 from a library. In the chapter dedicated to nomenclature of coordinate complexes, while explaining the κ-system of specifying donor atoms, the following ...
3
votes
1answer
208 views

Deciding higher priority order between a triple bond and tertiary carbon

I want to know which of the groups will be given higher priority $\ce{-C#CH}$ or $\ce{-C(CH3)3}$ and why. I tried resolving the triple bond to single bonds such that they are phantom atoms. But that ...
3
votes
1answer
40 views

IUPAC Nomenclature doubt

My book names this compound as 6-ethyl-5-methylcyclohex-2-en-1-one. I have learnt that after numbering the principal functional group which is ketone in this case, we have to treat all other groups ...
0
votes
1answer
102 views

How to name an unsaturated spiro compound with many substituents? [closed]

I've been trying to name this compound, but I just can't, I've gotten a brilliant answer already, it's(8​E,11​Z,15​Z)-4-amino-11-carbamoyl-3-chloro-2-(chlorocarbonyl)-9-cyano-5-formyl-4-hydroxy-13-...
4
votes
1answer
195 views

Why is 2-(3-aminomethyl-2-hydroxypropyl) cyclohexan-1-one named so and not 2-(2-hydroxy-4-aminobutyl) cyclohexan-1-one?

What is wrong with naming it as 2-(2-hydroxy-4-aminobutyl) cyclohexan-1-one and taking the side chain to be having 4 carbon atoms with NH as substituent on the last? Would someone please explain this? ...
-1
votes
1answer
55 views

How to name this hydrocarbon [closed]

I saw a hydrocarbon bond line diagram. That have a methyl on top and a complex group down. I don't know from where to start numbering.Ihave posted the image.Can any body help me.Thanks in advance.
11
votes
2answers
1k views

Why is polyethylene not called polymethylene?

I understand that the monomer that polymerises to give polyethylene is an ethylene, but after polymerisation, the smallest repeating monomer in polyethylene seems to be a methyl and not an ethyl. So ...
3
votes
1answer
49 views

IUPAC-Naming of Dioxin

In the molecule 2,3,7,8-tetrachlorodibenzo-p-dioxin, the "p" means para--because each chlorine is para to an oxygen? In IUPAC nomenclature shouldn't "para" be replaced by a number?
1
vote
1answer
30 views

Why is 3-chloro-5-(1-methylethenyl)cyclopenta-1,3-dien-1-ol named so?

I'm afraid I can't find an image for this organic compound, but when applying lowest locant rule in the numbering (1-methylethenyl) gets 2 and Cl gets 4. (2,4) is less than (3,5). Why then is lowest ...
4
votes
2answers
239 views

Nomenclature for two cyclohexane rings linked by a single bond

From my current basic organic chemistry knowledge, I suppose it is 1,1-dimethylcyclohexane-4-methylhexane. I considered one of the hexane ring as parent chain. But I'm looking for the correct answer ...
2
votes
1answer
40 views

How to name long hydrocarbon chains? [duplicate]

It is not that I didn't google it before asking it here, I could it find it anywhere. My question must be simple but I'm really stuck upon it. How do you name long hydrocarbon chains? Like $\ce{C21H44}...
3
votes
1answer
169 views

Convention for numbering of carbons

I'm trying to understand how carbons are numbered in organic molecules (i.e. as in the following image). (source: Principles of Biochemistry by Nelson and Cox, p. 532) I've read and heard different ...
4
votes
1answer
30 views

Choosing Parent Chain, Complexity of Side Chains

Which parent chain should we choose for this structure? is it A or B? I followed the rule A-2.6, but it still got me confused. Both alternative A and B has the same number of side chains (2 side ...
2
votes
1answer
66 views

Naming a hexasubstituted benzene ring

In naming the attached compound, is there a reason it is termed: 3,5-dibromo-1-chloro-4-ethyl-2,6- dimethylbenzene as opposed to: 1,3-dibromo-5-chloro-2-ethyl-4,6-dimethyl benzene? Shouldn'...