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.

0
votes
0answers
32 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
30 views

IUPAC names of imines [on hold]

How to write IUPAC name for this imine compound?
-1
votes
1answer
30 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 ...
0
votes
0answers
39 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
31 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 ...
-1
votes
0answers
13 views

How to number the carbons between bridge head carbons in a bicyclo compound?

A or B which will have the lowest locant 11 and highest locant 12? does propyl and butyl group in A and B affect the numbering?and please tell can z and y value be equal?
2
votes
1answer
46 views

Doubts on IUPAC nomenclature of organic compounds

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
222 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
46 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
58 views

IUPAC Name for the following? [closed]

Need help with the IUPAC name for the following line structure.
6
votes
1answer
266 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
38 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
20 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
45 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
335 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 ...
1
vote
0answers
44 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
49 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
1answer
77 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
166 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
55 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
83 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
38 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
54 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 ...
2
votes
1answer
109 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 $\ce{-C (CH_3)_3}$ and why. I tried resolving the triple bond to single bonds such that they are phantom atoms. But ...
3
votes
1answer
38 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
88 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
193 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
52 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
48 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
29 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
145 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 ...
3
votes
1answer
34 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
111 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
29 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
53 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'...
2
votes
1answer
36 views

Help on alternative terpene names and naming schemes

I am a software developer and currently parsing data involving terpene profiles of plant samples. The data in question uses different ways of naming the same terpenes in-between samples and since this ...
1
vote
2answers
383 views

When to use iso and sec while naming compounds in alkyl halides?

I am having confusion on when to use iso- or sec- while naming the alkyl halides?
12
votes
1answer
101 views

Nomenclature of lithiated dithianes

Lithiated dithianes have a few uses in organic synthesis (albeit fairly niche ones) such as the Corey-Seebach alkylation / Corey-Seebach reaction, which uses dithianes as masked acyl anions (d1 ...
2
votes
1answer
59 views

IUPAC of heterocyclic compounds terminology

During my studies of heterocyclic compounds I learned that monocyclic compounds has prefix+ stem+ suffix. the prefix is coming from the heteromolecule name (e.g oxgen --> oxa- ) however the stem and ...
-1
votes
1answer
46 views

Sec-butyl vs Butyl - Alphabetizing and Ordering in Alkane Nomenclature

For the structure below, if we use trivial name for complex substituent, do we call it 5-butyl-10-sec-butyltetradecane, or 5-sec-butyl-10-butyltetradecane? Considering that both substituent are ...
3
votes
1answer
500 views

What is an aromatic alcohol?

The following question was given in NCERT Exemplar Problems (Class XII): According to Wikipedia: In organic chemistry, the aromatic alcohols or aryl-alcohols are a class of chemical compounds ...
0
votes
2answers
136 views

What are the functional group names of halogenoalkanes?

The functional group name of other organic compounds is easily findable, but that of the halogenoalkanes (or haloalkanes) is not. This makes me wonder if such a name exists for the halogenoalkanes or ...
1
vote
1answer
56 views

What do numbers in parenthesis after elements respresent?

I have seen elements with a number in parentheses after them in literature, but cannot find what it means. What does the number in parentheses after an element represent, such as in W(100) or Mo(110)? ...
5
votes
1answer
379 views

What do 1T and 2H mean in front of compounds?

I have seen 1T and 2H used as prefixes for metallic compounds in literature, but I am having trouble finding what they mean. For example, 1T-HfS2 or 2H-HfS2.
21
votes
1answer
829 views

How to name binary (inorganic) compounds given their chemical formula, and vice-versa?

I wish to understand how to name binary (inorganic) compounds when given their formula. When I am a given compound like $\ce{B2F2}$ or $\ce{N2O4}$, I have little to no clue on how to write their ...
0
votes
1answer
124 views

Meanings of isopropyl, n-butyl, isobutyl, s-butyl and t-butyl and differences between them

I am having a hard time learning organic chemistry because I cannot understand the meanings of isopropyl, n-butyl, isobutyl, s-butyl and t-butyl. There is no proper explanation given in my book about ...
4
votes
2answers
66 views

Thiol prefixes for nomenclature

I've seen multiple prefixes for naming thiols: mercapto-, sulfanyl-, and -thio. Is there a rule for when specific ones are used? And are they used for IUPAC and/or common naming?
0
votes
0answers
32 views

Equivalent for the N prefix of amides and amines in common naming

Are there common names for amines and amides that have more than one carbon group attached to the nitrogen atom? IUPAC names are written using N,N- but I don't know if there's any equivalent for ...
1
vote
1answer
45 views

Nomenclature of common naming of alkynes vs alkenes; both -ene?

Is there a difference between common naming of alkenes vs alkynes? Why is Ethylene the common name for an alkene and acetylene for an alkyne? Isn’t acet- the common form of naming ethyl groups anyway ...