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

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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, ...
4
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2answers
213 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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0answers
65 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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1answer
34 views

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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1answer
51 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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63 views

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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1answer
38 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 ...
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2k views

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: ...
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1answer
79 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
85 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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38 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
57 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
85 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
60 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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1answer
474 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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2answers
65 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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1answer
253 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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1answer
781 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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1answer
132 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
27 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
303 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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2answers
83 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 ...
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1answer
84 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
75 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
40 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
125 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
217 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
394 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
27 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 ...
2
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1answer
251 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
106 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
157 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
91 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
158 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
2k 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
35 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
113 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
63 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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1answer
185 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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1answer
119 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
76 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
220 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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3answers
385 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
73 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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322 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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126 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
98 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 ...
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1answer
697 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 ...
3
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1answer
76 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 ...