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

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If there are two longest chains possible in an organic compound and both have the same number of substituents, how do we decide the parent chain? [duplicate]

Is the parent chain in the above case determined by atomic mass, alphabetical preference or any other rule?
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28 views

Name for analog of salt hydrate with non-water solvents?

Salts can bind with some water to form hydrates. For example, we can call $\ce{CoCl_2\cdot 6H_2O}$ cobalt chloride hexahydrate. There is no reason that water should be the only solvent that can bind ...
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Which has higher priority according to Cahn-Ingold-Prelog priority rules?

Does vinyl or secondary butyl have higher priority, and why? According to my textbook, vinyl has higher priority than isopropyl, because an atom which is connected by a double bond can be treated as ...
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23 views

Specific and general acid catalysis

What is the rationalization for calling reactions with rates independent of pH but dependent on the concentration of a particular acid catalyst under "general" acid catalysis, and pH dependent ...
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51 views

Carbon with two double bonds and oxygen name

I have a compound like this: $$\ce{CH2=C=O}$$ I wonder if it is a functional group or a normal group. As a functional group I couldn't find out. Is it a normal compound or a functional group and ...
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What is the the full name of TAPD? Structure provided

I have a substituent called TAPD on a molecule I'm working with. I have a hard time locating information about its properties. The bold square in the picture below is supposed to be the rest of the ...
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30 views

Are these organo-metallic compounds?

My understanding says organo-metallic = organic + metallic compunds. One already known to me is Grignard Reagent ($\ce{RMgX}$). But would you consider $\ce{NaOMe}$ or $\ce{NaCCH}$ as an ...
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46 views

Why does an acid salt possess acidity as well as basicity?

For example, $\ce{BaHPO_{4}}$ has acidity of 2 and basicity 1. Why does this so? Its basicity is 1 because it has 1 replaceable hydrogen ion. But why does this have acidity?
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138 views

Why do we insert a numerical multiplier after group positions when naming an isomer?

For example, take 2,3 dimethylbutane for example. Why do we add the numerical multiplier 'di' when we've explicitly mentioned two locations? Why not just use 2,3 methylbutane? It seems highly ...
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41 views

Phenyl or benzene when naming compounds

In this picture, the last two molecules are both rings. However, the second last molecule has a halogen substituent and was named "bromobenzene". The last molecule had a chlorine and a hydroxyl ...
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How do you name an alkene using IUPAC rules if the longest carbon chain in this alkene does not include the double bond?

For example, which is the right way to name this certain compound: 2-bromo-4-methylene-hexane or 4-bromo-2-ethylpent-1-ene? Does the larger number of carbon in a chain take priority, like in the ...
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Why do some chemical symbols contain a single letter while others contain two letters in the periodic table?

I am not kidding, this is one of the questions in my chemistry worksheet. Any help appreciated!
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Meaning of prefix p,p′-?

I recently stumbled across the substance "p,p′-terphenyldicarboxylic acid" in a scientific journal when recently reading about metal–organic frameworks. Could someone explain the prefix p,p'- to me?
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Organic Chemistry geometrical isometry

What are the configurations of these two compounds? Are they E or Z? Are they Cis or Trans? What are the rules for these types of isomerism? Thanks
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119 views

Why is it -en-yne and not yn-ene? What is the explanation for this IUPAC specification? [duplicate]

In class today, we were presented with the following molecule: which we determined to be "hept-1-en-6-yne." The order of classification places alkenes above alkynes, so we get the appropriate ...
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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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102 views

What is has a higher priority in naming organic compounds, alkyl groups or halides?

2-Chloro-3,3-dimethylbutane or 3-Chloro-2,2-dimethylbutane? According to these sources both are correct: NIST/TRC Web Thermo Tables (WTT) ChemSpider
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55 views

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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39 views

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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3answers
48 views

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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135 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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150 views

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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75 views

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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36 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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153 views

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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43 views

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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143 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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2answers
63 views

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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149 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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98 views

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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125 views

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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2answers
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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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31 views

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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314 views

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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303 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
102 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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134 views

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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66 views

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 ...