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

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Distinguishing between 'particles', 'molecules' and 'chemical species'?

I have read this article about the difference between 'compound', 'mixture', 'element' and 'molecule', but I would like to know the precise definitions for more terms (see below). From the article, ...
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27 views

Meaning of Cu1.5Al in Cu-Al phase diagram (I understand all other indexes incl. fractions like Cu0.75Al0.25)

I understand Cu0.75Al0.25 - that's just 75% Cu, 25% Al. I understand integer indexes - that's a normal chemical formula after all. However, I have no idea how to interpret Cu1.5Al, I've never seen a ...
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88 views

Meaning of “n” in “n-octane” (and similar others)?

Straight-chain octane is also called n-octane. https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=356 ("Also known as:") I don't see any purpose for the "n"?
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84 views

-ic -ous nomenclature

I recently came across a practice problem in my textbook asking me to name a few compounds using -ic and -ous endings. The exact wording is: Write the name of each of the following ionic substances, ...
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249 views

Is “Propanol” correct name according to the latest IUPAC nomenclature?

My teacher said that Propan-1-ol can also be written as Propanol in latest IUPAC nomenclature. I doubt this because wikipedea mentions only Propan-1-ol in IUPAC naming and Propanol in other names. ...
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26 views

Finding the chemical name of SnMg₂O₄

Can somebody help me in identifying the name of $\ce{SnMg_2O_4}$? Other examples are $\ce{ZnAl_2O_4}$ (Zinc Aluminate), $\ce{ZnIn_2S_4}$ (Zinc Thioindate). Please kindly provide the reference if ...
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51 views

Why is it written as “joule” and “J”?

Why is the unit joule is written as "joule" and "J", I mean what does "J" mean and what does "joule" mean.
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49 views

What is the simplest structural unit of an element or compound?

From "Smarter than a 5th Grader": What is the simplest structural unit of an element or compound? molecule, atom, neutron, proton For covalent compounds, the answer would ...
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55 views

Why isn't SiC called carbon silicate?

Is there any rule why a crystal made of Si and C is named silicon carbide SiC, but never carbon silicate CSi? Both silicon and carbon are in the same group, so share many of the atomic properties, so ...
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38 views

1,6-dimethycyclohexene and 2,3-dimethylcyclohexene

Is there a difference between these two molecules? If so how does one tell? What is the correct nomenclature for cycloalkenes? I know that the double bond is assumed to be between C1 and C2 but why ...
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34 views

Systematic name of OCS (COS)

What is the systematic name of carbonyl sulfide? My prof commented that the systematic name was "very odd" so he didn't bother to mention it. Is it really that odd? And what is it, actually? EDIT: ...
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42 views

what is the formula of potassium ammonium sulfate?

I tried to get the formula of potassium ammonium sulfate what I got is $\ce{K(NH4)2SO4}$ but I don't think this the right formula I searched in google, I found an answer : $\ce{KNH4SO4}$ BUT I don't ...
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28 views

is there any difference between glycerin and glycerol?

In laboratory setting, is there a difference between glycerin and glycerol? There are some conflicting info on this topic.
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26 views

What do '(6S)' and '5' mean in (6S)-5-formyltetrahydrofolate?

Tetrahydrofolate: I guess (6S) means some sixth S-center and 5 some other kind of numbering.
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2answers
99 views

Meaning of 1,1,1,2 in 1,1,1,2-Tetrafluoroethane & similar

What is the meaning of the 1,1,1,2 part in the compound 1,1,1,2-Tetrafluoroethane, a refrigerant commonly known as R-134a, some info: Formula: $\ce{CH_2FCF_3}$ Structure: Reference: ...
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1answer
48 views

Does the carboxyl group count as a branched chain

Do carboxylic acids (or any compound with a carbonyl group) count as a branch chained organic compound due to the C=O? Or does it need a carbon - carbon branch?
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17 views

R,S in Cyclic Compounds - Path of Highest Priority?

Consider (R)-3-bromo-1,1-dimethylcyclohexane. I wish to clarify how I assign R,S priorities in a cyclic compound. My book says to compare the atoms along the "path of higher priority." The problem ...
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2answers
59 views

Nomenclature with Complex Substituents

For the above molecule, I know that the longest carbon chain has 7 carbons, so the backbone is heptane. The two substituents are at the 4 position on the heptane. One of the substituents is a ...
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60 views

R, S Configuration and Branching - Which Path?

Which path do I take when we have a branched chiral center? None of the textbooks I've consulted adequately covers this or even provides an example problem in which there was branching. Consider ...
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55 views

Drawing (R)-1,1,2-trimethylcyclohexane

I tried drawing out (R)-1,1,2-trimethylcyclohexane but I can't seem to figure it out. I think I"m getting hung on assigning priorities. I've labeled the chiral carbon with an asterisk. I've also ...
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290 views

Why is it ACETone?

Acet* indicates Ethyl, but does not offer two Carbon atoms, but three. Acetaldehyde is Ethanal, Acetic acid is Ethanoic acid, but Aceton is Propanon (yes, I'm aware that there is no Ethanon). Why is ...
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49 views

Is NaHCO₃ a carbonate?

I know that $\ce{NaHCO3}$ is sodium bicarbonate, but According to Wikipedia: In chemistry, a carbonate is a salt of carbonic acid, characterized by the presence of the carbonate ion, ...
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304 views

How would you name this organic compound?

Because there are at most seven consecutive carbon atom, and four alkyl groups attached to the chain of carbon. I would name it 2,4 tetramethyl heptane.
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86 views

How are Organic Compounds named? [closed]

I have heard of of a special system which specially deals with naming of organic compounds. How do we get names such as 2-methylpropan-1-ol. I have tried googling it and found few links but their ...
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66 views

About the nomenclature: manganate or manganite?

I am a bit confused about the correct name of $\mathrm{LaMnO}_3$. Is it lanthanium manganate or lanthanum manganite? I was assuming that since $\mathrm{SrTiO}_3$ is called strontium titanate, ...
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48 views

Naming an ensemble of compounds

As part of intern work I am running simulations on a group of compounds, but as it is I have little in the way of O-Chem experience and I wanted to be able to at least get some direction on naming ...
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116 views

Why is it OH- and not HO-? [duplicate]

I am told that in a chemical equation the metal comes first and then the non metal. for example MgO, ZnSO4,etc. But when both the elements are non metals or metals, the one with the lower atomic ...
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63 views

Phase transition from gas to solid

Link to question paper The question says: The phase transition from gas to solid is called (A) condensation. (B) evaporation. (C) polymerization. (D) sublimation I am pretty sure the ...
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1answer
92 views

Is pitchblende the same as Uraninite?

Different websites say different things on the matter. For example: This Website Holds that pitchblende is also known by the name Uraninite. This Website Holds that pitchblende is a type of ...
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74 views

What is the name of this molecule? (C8O3H13N)

@tschoppi tried taking a stab at this for me and got this much: 1-(1'-oxoethyl)-2-(somethingsomething ester)-pyrrolidine
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2answers
65 views

What is the name of this structure?

I have a chemistry teacher and he always puts this image on his tests: I recognize that is an organic chemistry structure, but I can't figure out what it is. Does anyone know what this is?
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28 views

Nearest branch numbering

If the longest carbon chain is symmetric numbering-wise (meaning the numbering schemes are identical both ways) and has all alkyl substituents, should one prioritize the largest alkyl group? Thanks ...
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92 views

Does the position of the functional group on the terminal carbon change the nomenclature?

Consider two alcohols: $$\rm{CH_3 - CH_2 - OH }$$ and $$\rm{CH_3 - CHOH - H }$$ In the second alcohol, the hydroxyl radical instead of sticking out from the molecule, is bonded below the terminal ...
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82 views

How to read a given chemical formula?

I'm trying to read this chemical formula but I'm a bit confused. I'm hoping that someone could help break this down for me to explain what the various parts mean. Someone purchased epigallocatechin in ...
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1answer
87 views

Why doesn't EDTA have a double bond?

EDTA (Ethylenediaminetetraacetic acid) has a structure like this But why, as the name 'Ethylene' suggests, doesn't it should have a double bond between carbons?
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77 views

Nomenclature of organic compounds

When I name an organic compound, I follow a preferential order like so: http://www.masterorganicchemistry.com/2011/02/14/table-of-functional-group-priorities-for-nomenclature/ But I don't understand ...
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43 views

Nomenclature of Dihydroxyacetone Phosphate

Why the dihydroxyacetone phosphate is called that way when it has only one OH ?
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67 views

What is the correct form for the acid-base equilibrium constant potential: pK_a or pK_A?

In science, the acid-base equilibrium constant potential is denoted or depending of the source (lowercase or uppercase A). Since it is the potential of the acide-base equilibrium constant defined as ...
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3answers
62 views

Nomenclature for stereoisomer example possible wrong?

I understand the principal of the Cis-Trans naming system (at least I think so), until I saw this example in my learning material. My teacher doesn't know either so I thought I would post it here. ...
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220 views

Why is Potassium in French and English not called Kalium?

The symbol from the periodic table for Potassium is "K". This fits my native language (dutch), where Potassium is called "Kalium". The same question applies to Sodium (Na), which again in Dutch is ...
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655 views

Functional group naming order?

I'm currently studying some organic chemistry at highschool level. I understand that when naming an organic compound, the names for substituents should be done in alphabetical order. For instance ...
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64 views

Why are gem-dihalides not named as alkyllidene dihalides?

The dihalo-compounds having the same type of halogen atoms are classified as geminal halides (halogen atoms are present on the same carbon atom) and vicinal halides (halogen atoms are present on the ...
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29 views

Why is the nomenclature Glucose 6-phosphate, not 6-phosphateglucose?

What exact nomenclature rule define the naming of Glucose 6-phosphate?
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95 views

How did Halogens become known as Halogens? They are not the only elements that form salts!

Having never given it a though before, I recently discovered (in a different context) that the prefix halo- actually means 'salt' or 'sea' and the suffix -gen means 'to form' or 'to generate'. So the ...
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56 views

How do I start studying chemical nomenclature?

Chemical nomenclature seems to be the way chemistry "talks", allied with the mathemathics. But where to start?... and what reasons and theories are behind? Some "names" come from latin... I know there ...
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87 views

Naming of a molecule [closed]

$\ce{H2C=C=O}$ what is the group of the molecule? How to characterize it and how is this dissimilar to ketone? If we add $\ce{O2}$ with it then will we get $\ce{CO2}$?
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Is the nomenclature “primary”, “secondary”, “tertiary”, and “quaternary” carbon atoms limited to $sp^3$ carbon atoms?

In organic chemistry we can classify carbon atoms as primary, secondary, tertiary, or quaternary based on the number of additional carbon atoms bonded to the carbon atom of interest. The definitions ...
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50 views

On nomenclature of certain compounds

I have some questions on the nomenclature- (1) In $H_2O$ we have $H$ written first and $O$ is second but when it comes to Hydroxyl group $OH$ the $O$ comes first, Why? (2)Why is Propanal called ...
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233 views

Do the names of some elements have anything to do with Planets?

There are elements like Neptunium and Plutonium in the periodic table. Did their discovery have anything to do with Neptune and Pluto? Or are they randomly assigned with such names?
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508 views

What does the “3,4” mean in 3,4-methylenedioxymethamphetamine (MDMA)?

I'm curious to know, what exactly does the 3,4 part of 3,4-methylenedioxymethamphetamine represent?