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

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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: ...
5
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1answer
56 views

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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2answers
77 views

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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36 views

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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1answer
52 views

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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2answers
68 views

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 ...
2
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0answers
59 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. ...
8
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1answer
360 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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57 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 ...
4
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1answer
187 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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746 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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88 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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1answer
24 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 ...
5
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3answers
245 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, ...
2
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2answers
70 views

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 ...
3
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1answer
71 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
56 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
31 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 ...
3
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1answer
108 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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1answer
132 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, ...
2
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2answers
303 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
117 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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3answers
95 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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1answer
98 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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1answer
70 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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1answer
81 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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4answers
131 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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1answer
30 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
108 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
56 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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56 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
92 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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3answers
66 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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1answer
125 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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341 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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2answers
60 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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316 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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100 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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1answer
81 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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1answer
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 ...
2
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1answer
391 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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1answer
69 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
93 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
141 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-(something-something ester)-pyrolidine
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70 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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121 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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3answers
90 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
96 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?