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

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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? [on hold]

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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Chemical Formula for Potassium Monohydrogen Phosphite [on hold]

What is the chemical formula for: Potassium Monohydrogen Phosphite? Thanks. (The result was non-Googleable)
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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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57 views

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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328 views

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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52 views

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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157 views

Difference between polyethene and polyethane

The monomer in polyethene seems to drop the C=C bond and end up with a C-C bond. The polymer chain then looks like [CH2-CH2]n. If I were to look at that polymer chain I would probably call it ...
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724 views

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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55 views

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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23 views

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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3answers
213 views

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 ...
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1answer
61 views

What are the priorities for substituent groups on a cyclohexane?

I was wondering about this specific scenario: If you have a cyclohexane, for example, and the cyclohexane has two consecutive substituent groups, for example a methyl group and an ethyl group, how do ...
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1answer
49 views

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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1answer
30 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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1answer
102 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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102 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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2answers
283 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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1answer
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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1answer
72 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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80 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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60 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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59 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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48 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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39 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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28 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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106 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
53 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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27 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
83 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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61 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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75 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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322 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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55 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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311 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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96 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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76 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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1answer
245 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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65 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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1answer
86 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
68 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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109 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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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
89 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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83 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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1answer
48 views

Nomenclature of Dihydroxyacetone Phosphate

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