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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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What should be the IUPAC name of the following Spiro compound?

According to me it should be named as: 9-Ethyl-6-formyl spiro[5.4] dec-3-ene-1-carboxamide Please check if I am correct.
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1answer
45 views

What should be the IUPAC name of the following compound?

I think it should be named as 2-(cyclopent-1,4-diene)-2-methyl ethan-2-ol
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0answers
20 views

Confusion about prioritizing functional groups in case of poly functional organic compounds

According to Wikipedia, sulfonic acid $(\ce{-SO3H})$ is comparatively stronger than carboxylic acid $(\ce{-COOH})$. Then why is sulfonic acid lower in priority than carboxylic acid (while naming poly ...
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0answers
28 views

Nomenclature of 1-ethoxypropan-2-ol [on hold]

Consider the following compound: Why it is named 1-ethoxypropan-2-ol and not 2-ethoxypropan-1-ol?
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0answers
46 views

Priority order of functional groups [on hold]

Reference:Order of nomenclature precedence among these functional groups The post above describes an alkyl side chain to be prior to alkoxy and halo. In that case how can we number the carbons ...
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0answers
36 views

How to assign locants in 3-chloro-4-ethylhexane?

For the compound shown above, which name (3-chloro-4-ethylhexane or 4-chloro-3-ethylhexane) is correct? Do we need to first look for the minimum number set, and check alphabetical priority only if ...
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1answer
30 views

Question about Carboxylic Acid Nomenclature

According to my chemistry textbook, 2-hydroxy-1,2,3-propanetricarboxylic acid is represented as: But 5-bromoheptanoic acid is given as: In the former nomenclature, propane is taken as the base ...
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0answers
30 views

Why do people commonly refer to Na2HPO4 as Sodium Hydrogen Phosphate, rather than Disodium Hydrogen Phosphate?

First of all, I am aware of this question. The purpose of my question is to understand why people seem to break the rules that IUPAC has set (See example five on page 76 of the book), especially ...
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3answers
1k views

What is the name of this chemical LiB2PO4H7? [duplicate]

I was recently looking at a chemical equation calculator that balances equations for you. I came across a reaction that I am unsure about, it goes like this: B2H6 + LiH + PO4 = LiB2PO4H7 I was ...
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1answer
29 views

Why is this named 3-phenyl-2-butanol instead of 2-phenyl-3-butanol? [closed]

Why is the following compound named 3-phenyl-2-butanol and not 2-phenyl-3-butanol? Does the alcohol or the phenyl group have priority?
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1answer
45 views

Does an acetal need to have one hydrogen attached to its carbon?

I was asked to identify the functional groups in this molecule above. So far I have found an amide ($\ce{-NHAc}$), an ether ($\ce{-OBn}$), and a conjugated diene, but I was also told that there is ...
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1answer
39 views

Does the priority go for the longer substituent, the closer one, or one which contains a pi-bond in naming Alkenes and Alkynes?

In the new IUPAC nomenclature, the longest chain is given the priority over that which contains the most number of double bonds. In naming this alkene: From which end would we start numbering? ...
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1answer
33 views

Ketone prefix organic chemistry nomenclature

Is there a difference between the prefixes keto- and oxo-?
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1answer
22 views

Nomenclature priority of prefixes consisting of identical letters but containing different locants [closed]

I have no idea how to name this compound. Can someone please help give the IUPAC name for this? Also mention the IUPAC nomenclature rules followed while naming.
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1answer
51 views

What should be the IUPAC name of this compound?

I feel that either of 4-bromo-3-chlorocyclohex-1-en-5-yne or 3-bromo-4-chlorocyclohex-5-en-1-yne is correct.
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2answers
87 views

The nomenclature behind “Diacetonamine”

Please explain how the name “Diacetonamine” can be found by looking at the formula: $$\ce{(CH3)2C(NH2)CH2C(O)CH3}$$ Why is it called “Diaceto” if there only one $\ce{-C(O)CH3}$ group?
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1answer
41 views

IUPAC nomenclature of aspartame

I'd like some help in constructing the IUPAC name of aspartame: From what I understand there are carboxylic acid, amine, amide, ester, and phenyl groups - but I'm having trouble figuring out the ...
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1answer
43 views

Can benzene ring be the part of a acyl group

Can benzene ring attached to c=o i.e carbonyl group be considered as a acyl group?
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0answers
24 views

IUPAC name of this trisubstituted benzene [duplicate]

Can you guys please help me name this compound? Steps would be appreciated.
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1answer
25 views

Differences in Glycerol Nomenclature [closed]

Could someone differentiate between the terms glycerol, glycerin, glyceryl and glyceride?
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0answers
38 views

Endo/Exo for same length bridges

I'm looking at a cycloaddition that produces a bicyclic intermediate, there are two different ways of doing the addition which can be described as endo/exo. However, all three bridges are the same ...
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2answers
109 views

I need the diagram of “cyclobutanal” [closed]

I doubted whether I can say cyclobutanal or not. Im confused and didn't found my answer anywhere
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1answer
34 views

How does NH4+ come to being?

There are 5 valence electrons in Nitrogen and in order for it to have a complete outer shell (8 electrons) it needs 3 more electrons. Why is it the case that the Nitrogen needs 4 Hydrogen instead of 3 ...
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1answer
29 views

Formulation and Nomenclature of Boric and Phosphoric Acids

Why are boric and phosphoric acids are formulated as: H3BO3 H3PO4 Instead of: HBO2 HPO3 Because the acids end with the -ic suffix, the valences of the elements between the hydrogens and oxygens ...
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2answers
94 views

Numbering in a derivative of azulene

I was wondering if anyone can tell me how to number this molecule: This molecule is derived from azulene by addition of two sulfurs and two oxygens at positions 2, 6, 1, and 5 respectively. I would ...
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0answers
29 views

Iupac nomenclature problem [closed]

I am unable to write the iupac name of the following compound
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1answer
99 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 ...
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0answers
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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. ...
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1answer
22 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' ...
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1answer
44 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 ...
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1answer
20 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?
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1answer
39 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-...
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1answer
45 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 ...
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233 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)
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1answer
37 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 ...
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1answer
108 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? ...
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0answers
47 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 ...
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1answer
885 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 ...
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0answers
40 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 ...
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1answer
118 views

IUPAC names of imines [closed]

How to write IUPAC name for this imine compound?
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1answer
42 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 ...
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1answer
59 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. ...
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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 ...
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2answers
110 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 ...
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1answer
236 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.
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2answers
54 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?
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1answer
63 views

IUPAC Name for the following? [closed]

Need help with the IUPAC name for the following line structure.
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1answer
400 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 ...
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1answer
106 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-...
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1answer
25 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?