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

learn more… | top users | synonyms

1
vote
1answer
28 views

Why is microcosmic salt called so?

I really see no relation between the terms microcosmic and the salt's structural formula, $\ce{Na(NH4)HPO4.4H2O}$. Devoting sufficient time on Google didn't help at all. Information about the name ...
8
votes
3answers
100 views

Pubchem, Inchi, SMILES, and uniqueness

Pubchem compound 6140 is L-phenylalanine in its neutral (not zwitterionic) form. According this PubChem, this molecule has the following SMILES and InChI indentifiers: Smiles: ...
0
votes
1answer
38 views

What is the main difference between Quantum Clusters and Nanoclusters? [closed]

I know that Quantum Dots have high quantum yield and ranges from 2nm-10nm, and Nanoclusters have high fluorescence and ranges from 1nm-10nm. But the difference between them is that Quantum Dots ...
1
vote
1answer
82 views

What is the rule for the punctuation marks for a bicyclo compound?

What is the rule for the punctuation marks within the bracketed figures for a bicyclo compound? Is it a 'dot' or 'comma'? In some books there are commas whereas dots in some others.
5
votes
2answers
50 views

Correctness of writing H3C as opposed to CH3 in a carbon chain

I have been studying alkanes, alkenes & alkenes for a while, and I see in the examples that all the basic structural formulas start with CH3 then CH2 and the last carbon atom is CH3 but the one ...
0
votes
1answer
43 views

IUPAC nomenclature

Can $\ce{Ph-CH2-Ph}$ be also be named as as (phenyl methyl) benzene instead of diphenyl methane? I came to this thinking that $\ce{CH2-Ph}$ can be considered as side chain at side chain.
0
votes
1answer
53 views

Problem with naming an alkene

While reading this topic, I've found that alkene are named using cis-trans or using -ene. What will be the name of this compound $\ce{CH3CH=CHCH3}$ according to the rules of IUPAC? Is it bute-2-ene ...
8
votes
2answers
176 views

How to name the following alcohol?

I added a branch to the example shown in the textbook. What do you do when your longest carbon chain has a $\ce{CH2Cl}$ attached to a certain carbon? Previously the book treated it as a methyl group ...
5
votes
1answer
230 views

Why is the IUPAC name of glycerol expressed in the way that it is?

I have come across the name trihydroxy propane for glycerol, which I think should've been Propan-1,2,3-triol. Why is it named this way? Is there any other rule of nomenclature working?
3
votes
1answer
74 views

Oxidation of Carbon atom in Alkene, Alkyne and Alkanes of functional groups?

Nomenclature priorities are in order of the degree of oxidation of the carbon atom. I am not sure if it's advisable to just take it as it is and use it or try to understand the basis of the ...
6
votes
1answer
65 views

Why are 'sec-' and 'tert-' prefixes printed in italics?

While reading about nomenclature of branched alkyl groups, I read that certain common names are also approved by IUPAC. Among those names, only few prefixes are italicised (namely sec- and tert-) and ...
1
vote
1answer
27 views

Naming of substituted amines and amides

While naming substituted amines and amides, should we consider the "N" while deciding the order of substituents or simply place the substituents attached to nitrogen in the beginning? E.g. Should the ...
0
votes
1answer
55 views

Is the compound named correctly?

I guess the ethyl group should be in the parent chain and the numbring should start from right. Hence, the compound should be named 2-methylhept-1-ene-1,3,4,5-tetracarbonitrile. Am I wrong somewhere?
2
votes
1answer
154 views

Is 3,5-diethyltoluene an accepted IUPAC name?

My book says that Monocyclic substituted hydrocarbons are named as derivatives of benzene or compounds like cumene, toluene, xylene, etc. However, if the substituent introduced into such a ...
6
votes
1answer
53 views

Nomenclature of alkoxy and halo groups

CH3-O-CH2CH2Cl How will this compound be named? Both, methoxy and chloro are given equal preference, since they are prefix functional groups. The answer given in the book is ...
3
votes
2answers
95 views

“Amino Acid”, question about name

When learning about amino acids, the primary things that were pointed out were that they had an amino group and a carboxyl group, and side chain that varies from one to the other. The amino group of ...
2
votes
1answer
85 views

Nomenclature of ether and locant position enumeration

Being a functional group, ethoxy should be given locant position 1, and hence this should be named 1-Ethoxy-2,2-dimethylcyclohexane. But, the correct name is 2-Ethoxy-1,1-dimethylcyclohexane. Can ...
-1
votes
1answer
59 views

Calculate the valence of Fe2O3 [duplicate]

$$\ce{FeO}$$ Is called "Iron(II) oxide ". $$\ce{Fe_2O_3}$$ Is called "Iron(III) oxide ". The number in the parenthesis is "Valence" of the substance. Frankly, I don't know how to calculate such ...
1
vote
2answers
67 views

Calculating valence of oxides

Learning about Oxides. Basically when oxygen is combined with a metal. $$\ce{FeO}$$ This is called "Iron Oxide (II)" according to my book. Apparently, the II represents the valence. But how come? ...
1
vote
2answers
48 views

Nomenclature of MnO4 -: is it an oxyanion?

Having a real pain with nomenclature. Look at this substance: $$\ce{MnO_4^{-}}$$ So, we got an anion of Manganese and Oxygen (or is that just an anion of Oxygen?). Anyway, my book says that ...
6
votes
2answers
87 views

When to use -ate and -ite for naming oxyanions?

I'm now learning about nomenclature. In particular, oxyanions. Basically, when you have an anion that is a combination of a non-metal with oxygen. According to my book: It ends with -ate for the ...
3
votes
1answer
45 views

Who devised the term elements?

Who devised the term elements? Who was the one who brought the term elements to us? Also please give a bit information on background of the man.
5
votes
0answers
37 views

Have P-acyl phosphines ever been synthesized?

I've done some amount of searching and can't seem to find any evidence in the literature that there exists a phosphine analogue of carboxyl amides. I'm looking for compounds of the form $ \ce{ ...
2
votes
1answer
690 views

Vinegar CH2O ? COH2

we must write empirical formula of $\ce{CH3COOH}$ as $\ce{CH2O}$ or $\ce{COH2}$ ? Alike ? Any nomenclature? Somebody told me it was because of bonding, different way of writing the chemical formula ...
2
votes
1answer
59 views

Are all complexes with a polydentate ligand examples of chelation?

I'm getting a little confused about the definition of chelation and its implications (I should probably point out I'm only an A2 Chemistry student). The IUPAC defines chelation as the following: ...
0
votes
0answers
23 views

Where does the prefix “Bi-” come from in Sodium Bi-carbonate? [duplicate]

Sodium Carbonate has two sodium ions on each carbonate entity, which is has both protons replace by the two sodium cations. Sodium Bicarbonate has one proton and one sodium cation on each carbonate. ...
3
votes
2answers
53 views

Naming double bond sidechain [duplicate]

In IUPAC naming double bonds take preference over an alkane chain of any length, right? So the above should be named as 2-ethylnon-1-ene. However, when I verify ...
7
votes
2answers
294 views

Does the term 'silver nitrate' express all of its constituent chemical elements?

My professor gave my class a set of practice questions for the mid-term. One of those questions asks for the molar mass of a number of chemicals, such as lithium bromide and silver nitrate. We haven't ...
3
votes
1answer
67 views

Why is the gram no longer a function of the atomic mass number?

According to Wikipedia, ... the definition of the gram is not (as of 2011) mathematically tied to that of the atomic mass unit Why did we change that?
13
votes
3answers
224 views

How to assign E/Z configuration according to the Cahn-Ingold-Prelog rules when subsituents differ only by stereochemistry

I stumbled-upon this compound: CC=C1C(C)CCC1(C) I'm wondering how to determine the configuration of the double bond. Is it E or Z? How do I decide on the ...
4
votes
1answer
117 views

Nomenclature of complexes: Cyano vs Cyanido ; Chloro vs Chlorido

What is the correct nomenclature for $\ce{CN^-}$ and $\ce{Cl^-}$ ligands in coordination compounds? Wikipedia says the coding name(?) as cyanido and chlorido while this suggests cyano and chloro. ...
3
votes
1answer
70 views

Nomenclature of an organic compound

Which substituent should be placed first (in case of alphabetisation)? isopropyl- methyl- I have come across two compounds: 1-methyl-3-methoxy-4-isopropylbenzene and ...
2
votes
1answer
82 views

Did Berzelius unify the names of chemical elements using the Latin language?

I asked this question because the Chinese Wikipedia community is trying to decide whether it should use Latin names or IUPAC names for the first introductory sentence for its articles on chemical ...
5
votes
1answer
66 views

Method of deriving some properties or possible method of synthesis of a specific monomer

This is kind of like two questions but since they're related I have put them together. Consider a monomer under a hopefully anatomically correct name 'Phenyl Carbolithia Divinylene Oxide ...
8
votes
1answer
146 views

Nitrogen chain nomenclature

I know that nitrogen is versatile enough that it can form branched chains if it is all single bonds. For example: $\ce{H2N-N(NH2)-NH2}$ Is this compound a nitrane (nitrogen alkane)? If so how ...
5
votes
1answer
146 views

Bond-Line Structure for an Alkane

My textbook tells me the following structure is 2,2,5-trimethylpentane. I try to change the parent group in different ways so as to maximize the number of substituent groups, but I think the maximum ...
1
vote
1answer
28 views

Nomenclature of an Alkane

Is the correct name for the following structure 3-tert-butylhexane or 3-ethyl-2,2-dimethylhexane? I think it is 3-tert-butylhexane, but the textbook says it is 3-ethyl-2,2-dimethylhexane. Can someone ...
2
votes
1answer
72 views

Difference between a dimethyl and ethyl substituent groups

I'm teaching myself organic chemistry and am struggling with differentiating between dimethyl and ethyl substituent groups. Example: tert-butyl (1,1-dimethylethyl) This chapter follows the one on ...
2
votes
1answer
56 views

Nomenclature of organic compounds containing complex side chains

How do we decide the sequence of substituents in a organic compound if one of the substituents is complex. Should the complex chain must always be written first while writing the IUPAC name or are ...
6
votes
2answers
80 views

Nomenclature Precedence Order for Unsaturation and Hydrocarbon Chain

When naming branched alkenes/alkynes, the numbers of the carbons where the branches and multiple bonds are located are supposed to be the lowest possible. Do the branches take precedence over the ...
7
votes
2answers
87 views

Why was the prefix 'bi' used in compounds, such as for bicarb of soda?

According to the Wikipedia article IUPAC nomenclature of inorganic chemistry, he prefix bi- is a deprecated way of indicating the presence of a single hydrogen ion A very common example is the ...
4
votes
1answer
79 views

Naming ionic compounds with multiple cations and anions

I have seen complex ionic compounds that have mixed anions and/or mixed cations. For Example I have seen this: $$\ce{NaKCl2}$$ Also known as Sodium Potassium Chloride. The only information I can ...
3
votes
1answer
55 views

Stereochemistry: R and S notation

How do we number the carbon atoms in symmetrical molecules while giving R and S notation. For instance, in 2,3-Dibromobutane, there is an ambiguity over which is carbon C2 and carbon C3. Will we call ...
0
votes
1answer
16 views

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?
5
votes
1answer
41 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 ...
5
votes
1answer
115 views

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 ...
4
votes
1answer
36 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 ...
5
votes
2answers
93 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 ...
5
votes
1answer
59 views

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 ...
-1
votes
1answer
38 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 ...