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

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What decides the order of priority of functional groups in organic compounds?

Is the order of defined by IUPAC or we follow some special conventions to know the order of priority?
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Organic naming: priority order of alkyl groups vs halide

2-Chloro-3,3-dimethylbutane or 3-Chloro-2,2-dimethylbutane ? According to these links both are correct: 1.http://wtt-pro.nist.gov/wtt-pro/index.html?cmp=2-chloro-3.3-dimethylbutane ...
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IUPAC nomenclature Cyclic vs Acyclic

In this compound both the cyclic and acyclic have 3 carbons , hence a tie. Even the substituent comes on the 2nd position in both cases . So should the main chain be the cyclic one ? (since for ...
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What is the IUPAC nomenclature for Intermetallic Compounds?

So IUPAC has a system for naming organic compounds, ionic compounds, and inorganic compounds. I have seen something vaguely suggesting there is one for intermetallic compounds, such as: $$\ce{Fe-Co}$$ ...
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How do I decide the parent chain of an organic compound that has a ring as well as a side chain while naming the compound?

I think that this is decided by the number of carbon atoms. The part which has greater the number of carbon atoms, is considered the parent chain. But this fact is not leading to the correct result ...
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Is the following statement about IUPAC nomenclature of substituted benzene accurate?

'While naming any compound, the numbering should be done such that position of substituted groups gives smallest sum.' I'm struggling with IUPAC naming for cyclic compounds. How exactly does one go ...
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IUPAC Nomenclature of Benzene+Aliphatic chain [duplicate]

What is this compound's IUPAC name? 1) 2-phenyloctane. 2) octan-2-ylbenzene. Is using phenyl correct or is taking benzene as the base correct?
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What is the priority of a phenyl group in a compound such as this?

I assumed this: http://www.chemspider.com/Chemical-Structure.12491.html?rid=222625d4-811c-4b07-b263-8930fafa831a to be 1-phenylbut-4-ene Where is the priority here? No source I know of tells me of ...
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Nomenclature of methyl groups in an alkanol

Hi, I'm having trouble with this question since I'm getting (A), when the answer says its (B). My logic was that there is a methyl group on the first carbon, and a hydroxide functional group on the ...
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94 views

Why doesn't the double bond get preference for suffix in IUPAC naming of an Hydrocarbon when both double bond and triple bond are present together?

In the following hydrocarbon both double and triple bond are both present and the naming happens to be hexa-1,3 diene, 5-yne but as far as I have read the rule says the suffix should be given in the ...
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What is the meaning of brackets in a condensed molecular formula?

In the formula $\ce{(CH3)3-C-CH(CH3)-CH2-CH3}$, what do the bracketed portions represent? What is the molecular structure, and how do I name the compound?
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The meaning of different parts in the naming of glucose

There are two main types of glucose, $\alpha$-D-(+)-glucose and $\beta$-D-(+)-glucose. Can anyone please explain what is $\alpha$,D or (+)? So (maybe by permutation and combination), how many types ...
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34 views

Maltose Nomenclature

Maltose has a 1,4 glycosidic linkage between 2 molecules of α-D-Glucopyranose . My textbook suggests the final name of maltose as 4-O-(α-D-Glucopyranosyl)-D-glucopyranose I wanted to know what ...
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Do molecules with axial chirality have “stereogenic units”?

This question is a follow-up to a recent question on discodermolide stereochemistry that I answered here. In the course of reading IUPAC's definition of "stereogenic center", I wondered if axially ...
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How can I draw 2,3 diethyl heptane

This question was given by my teacher in class : Draw the structure of 2,3 diethyl heptane. So I drew the following: ...
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Nomenclature of inorganic compounds

As depicted in books, $\ce{NO3-}$ and $\ce{NO2-}$ are called as nitrate and nitrite respectively. Where (-ate) suffix is used for higher oxidation state and (-ite) suffix is used for lower oxidation ...
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135 views

What does the prefix “dihydro” in the systematic name of luminol refer to?

I'm doing a research project on the fascinating chemiluminescent molecule luminol, and figured it would be a good idea to start breaking down the systematic name of the chemical and linking the terms ...
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What does it mean if a functional group has “higher priority” in terms of IUPAC naming of organic compounds?

What does "higher priority" mean exactly in the following statement from this wikipedia article (article name: "E-Z notation") on naming organic compounds in IUPAC nomenclature of organic compounds? ...
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Organic chemistry - alkanes step up reaction

Well I was studying organic chemistry, and I came across this reaction for increasing the length of the carbon chain. Upon asking my teacher about the following reaction, she said she was unsure about ...
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Why are PTFE and FEP named “ethylene” when they don't have double bonds? [duplicate]

PTFE (Polytetrafluoroethylene) and FEP (Fluorinated ethylene propylene) have the following chemical formulas: It's been years since I have taken organic chemistry, but I do remember alkenes have ...
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IUPAC naming - choosing the main branch doubts

What are the rules for choosing main branch? Wikipedia states - "Identification of the parent hydrocarbon chain. This chain must obey the following rules, in order of precedence: It should have ...
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109 views

Is cyclohexol the same as cyclohexanol?

I recently came across different names for the following compound: Is the IUPAC name for this cyclohexol or cyclohexanol? Is ...
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Is Carbon Dioxide Organic or Inorganic?

Today in Chemistry class we were discussing Organic Chemistry. We discussed what organic compounds basically are and then I asked teacher whether $\ce{CO_2}$ is organic or not. She told that it is as ...
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Order of nomenclature precedence among these functional groups

The order of precedence for functional groups I have so far is: carboxylic acid ester amide aldehyde ketone alcohol amine multiple bonds ether organic halide I'm pretty confident that from 1 to ...
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What is the proper name for the but-1-ene's isomer methylpropene?

Give the name and draw the graphical formula of an alkene that is an isomer of but-1-ene and that has a different carbon skeleton. I think it's 2-methylpropene - but I'm not sure whether the ...
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What is the origin of the naming of Desoxycorticosterone acetate?

Desoxy- means the compound misses an Oxygen comparing to the name without the prefix. Acetate means ethanoate in IUPAC language. Many biologists still abide old rules and call it acetate. And finally, ...
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Which is the parent chain in Neopentyl chloride? and why?

Which is the parent chain in this structure? and since all have 3 carbons so should any of them be the parent chain, if not .. then which should be and why? is it a rule in IUPAC naming?
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IUPAC name for a compound

What is the systematic name of the compound shown in the image My try: 3-propylpentane.
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What is the reason behind the numbering of nitrogen bases?

I am studying nitrogen bases and their structures and roles in nucleotide, polynucleotides and nucleic acids formation. In the structures of the nitrogen bases like Adenine, Guanine, Cytosine and ...
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197 views

Is Benzene Carbaldehyde a correct name?

Is benzene carbaldehyde a correct name for Benzaldehyde? I'm (always) getting confused between common and IUPAC names. If the above name is correct then is it a common one or IUPAC? And why don't we ...
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1answer
101 views

Histidine-Phosphate in Succinyl CoA synthetase and phosphoglycerate mutase enzyme

I would need to know the type of bond of histidine-phosphate in succinyl CoA synthetase enzyme. Can anyone help with this? Is it a Carboxy phosphate anhydride ? Is it the same type of bond of ...
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Why is the structure of 3, 4-Dimethylhexane given as follows?

Question: name the IUPAC name of the following structure: And here's what I could come up with is this: we start from the first carbon atom from the extreme left and end with the 2nd substitute ...
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Alkane nomenclature - choosing the parent chain - maximize or minimize substituents?

Given structure: Here's my go at it. The longest carbon chain has 10 Carbon atoms, so the root -- decane. Next: let's take the substituent in position 3, we get ...
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IUPAC Naming: 2-phenyloctane or 2-octanylbenzene

How would you name the above compound according to IUPAC rules? I see some sources say it is 2-phenyloctane, but chemdraw and a few other sources say it is 2-octanylbenzene. Also, if it is the ...
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Naming system -“ylene”

There are various compounds which have common names that end in "ylene", like acetylene and ethylene. However, how come acetylene is an alkyne whereas ethylene is an alkene. Both of these have the ...
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Why are the rare earths erbium (Er), terbium (Tb), yttrium (Y) and ytterbium (Yb) named like that?

I know the history of the discovery of the rare earth elements, that they were discovered near the village Ytterby in Sweden in the 19th century. Four elements are directly named after that village: ...
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Is there a hierarchy to functional groups?

I think I am getting slightly confused about the names we give to functional groups. I am aware that there are different types of functional groups such as alkyl, aryl and acyl groups. I also know ...
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Why doesn't this structure represent a substituted pentane?

In the following ASCI structure (single bond under "$\ce{CH}$" containing $\ce{CH2,CH2, CH3}$) $$ \begin{align*} \ce{CH3-CH2-CH2-&CH-CH3}\\ &|\\ \ce{&CH2-CH2-CH3} \end{align*} $$ The ...
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Nomenclature in Other languages

Even one letter can make a huge difference in Chemistry Nomenclature. So I am looking for credible resources that is specifically published for explaining Nomenclature rules, examples in Spanish. Any ...
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What are derived names? [closed]

Q)The derived name of (CH3)4C is A)Tetramethylmethane B)2,2-Dimethylpropane C)Neopentane D)None of these The answer was A. What is a derived name?Never heard of it in any book. Thanks
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Why is K2CrO4 Potassium chromate?

I was given $\ce{K2CrO4}$ and was asked to name the compound. Can this be done by: 1) Determining the molecular compounds oxidation state or 2) Does one need to memorize the polyatomic ions and ...
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Something I've never understood in chemistry [closed]

I've never understood how to systematically write out IUPAC names. For example, how do I write out 6-aminohexanoic acid ? I tried searching for IUPAC related terms, but I didn't get the gist of it. ...
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What is the IUPAC systematic name for methane?

The 1993 IUPAC Blue Book claims that "methane" is a semisystematic name: Semisystematic names also exist, such as "methane", "propanol", and "benzoic acid", which are so familiar that few chemists ...
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How would one express pemoline in terms of phenethylamine?

Pemoline is a psychostimulant that is no longer used in most countries. Similarly to the psychostimulants amfetamine and methylphenidate I can clearly see a phenethylamine backbone to this compound. I ...
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397 views

What is the difference between polyethene and polyethane?

The monomer in polyethene seems to drop the $\ce{C=C}$ bond and end up with a $\ce{C-C}$ bond. The polymer chain then looks like $\ce{[CH2-CH2]_{n}}$. If I were to look at that polymer chain I would ...
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Why do we write NH₃?

We've learnt that the electropositive element is written first. Then why is ammonia written as $\ce{NH3}$ ?
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Why is a temporary name given to an element with an atomic number above 100?

All the elements with an atomic number more than 100 are given temporary names by IUPAC according to nomenclature rules. For example, element 101 was temporarily named "Unnilunium" until they give it ...
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Chemical nomenclature of ions

I'm a very beginner in chemistry. The book I'm studying says that an ion is an atom, or a collection of atoms, that has an electric charge, then it writes about the difference between molecules and ...
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Boat conformation: axial hydrogens

In my exam, my teacher asked me if the following is true: "The chair cyclohexane has more axial hydrogens" I did not have time to think, so I just put false. And apparently I was right. But, at home, ...
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nomenclature of organic compound

I am basic concepts of organic compound. I have seen organic compound is written is two different ways. For example This compound is written as Pentan-3-one. While in some book it is written as ...