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

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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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33 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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47 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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76 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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57 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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53 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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59 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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72 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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56 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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68 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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33 views

Nomenclature of Dihydroxyacetone Phosphate

Why the dihydroxyacetone phosphate is called that way when it has only one OH ?
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63 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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53 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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94 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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310 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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43 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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26 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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86 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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47 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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72 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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48 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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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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347 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?
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49 views

What is the structure of 2-methylimidazolate?

Looking for the structure of 2-methylimidazolate, I find conflicting results: this page on sodium 2-methylimidazolate gives: this other page on cadmium 2-methylimidazolate gives another anion, ...
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82 views

Is there a difference between imidazolidinone and imidazolidone?

I've had my nose in the early literature on GFP (Green Fluorescent Protein), which contains a 4-(p-hydroxybenzylidene)imidazolidin-5-one fluorophore, and in one paper the author refers to the ...
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296 views

What does lowercase r-s notation mean?

I came across a naming convention which I haven't seen before. I let ChemDraw name the following compound for me and got a name containing lowercase "r" and "s" configurations. Can someone tell me ...
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68 views

Fatty Acid Names

I have a list of Lipid numbers and I need to get the common names (where available) or the systemic names for them. I have found the names for most of them on Wikipedia but for the others I don't ...
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451 views

Is there a word for a compound that has both ionic and covalent bonds?

For example, calcium carbide (CaC$_2$) has covalent C‒C bonds and ionic Ca$^{2+}$‒ C$_2^{2-}$ bonds.
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224 views

Nomenclature of alkenoic acids - which group has priority: the alkene or the acid?

Right, how do you systematically name them? Also, do you number them from the double bond end or the Carboxyl end? Ie would it be something like. 2-methyl Hept-3-enoic acid? Scuse the bad question ...
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1answer
71 views

In Goodman and Gilman what does R,S-citalopram refer to?

In Goodman & Gilman's The Pharmacological Basis of Therapeutics, 12e R,S-citalopram is referred to. The problem is that from what I am aware of citalopram only has one stereocentre, and hence I am ...
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143 views

What is octanamide used for?

I read a paper about enzyme-catalysed synthesis of octanamide. What is octanamide used for?
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215 views

Pronunciation of “alkene” vs. “alkyne”

Maybe this is better in English.SE, but I think I'm more likely to get better responses here in the "industry" site. This post got me thinking; how do you pronounce "alkyne" (a hydrocarbon with a ...
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3k views

Correct definition of terminal alkynes?

My textbook, Organic Chemistry (6th edition) by Brown, Foote, Iverson, and Anslyn, states: Alkynes in which the triple bond is between carbons 1 and 2 are commonly referred to as terminal alkynes. ...
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34 views

What compounds do Nor1 and Nor2 citalopram refer to?

In Goodman and Gilman's The Pharmacological Basis of Therapeutics 12th Edition pg. 406, two drugs, nor1-citalopram and nor2-citalopram are referred to but I have no idea what they are. Could somebody ...
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258 views

What does the eta notation mean in the naming of a transition metal complex?

I am reading a paper (Gutel et al., J. Mater. Chem. 2007, 17, 3290-3292) and I have come across the following reaction: In organic solvents, the decomposition under mild conditions of ...
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1answer
53 views

Are there computer searches for new theoretical minerals in a similar vein to Folding@Home or SETI@Home?

As a surprise gift to a friend I would like to discover a new theoretical mineral and have it named after them. I have some understanding that not all minerals have been discovered, and some minerals ...
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1answer
63 views

Where did the INN name of Fentanyl come from?

Where did the INN name of Fentanyl come from? Fentanyl is a potent anilidopiperidine opioid. I know that the INN name of paracetamol came from its chemical name para-acetylaminophenol ...
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450 views

“Tie-breaker” rules for IUPAC nomenclature of organic compounds

I have three questions: To find the parent chain of a saturated hydrocarbon, we have to find the longest chain and then if we have a choice, we choose the one with the more substituents. But what if ...
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64 views

What is the proper nomenclature for CH₂O₂?

Can you tell me what's the nomenclature of $\ce{C H_2 O_2}$? What is its IUPAC name?
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2k views

Why do the names of most chemical elements end with -um or -ium?

Why do the names of most chemical elements end with -um or -ium for both primordial and synthetic elements?
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72 views

Correct nomenclature for reaction types

What is the correct name for a reaction like this? $$ \ce{ 4MnO2 ->[500\ ^\circ \text{C}] 2Mn2O3 + O2 ^}$$ Is it a synthesis, or a Decomposition? I tried to find it out with ...
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220 views

Are different enclosing mark types in chemical names needed to differentiate between substances?

What is the significance of enclosing marks in chemical names in determining the uniqueness of a substance (organic and inorganic)? Can a simple change in the type of enclosing mark used indicate ...
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274 views

What is the IUPAC nomenclature of alkane with higher C atoms (more than 200)?

What is the IUPAC nomenclature of alkane with higher C atoms (more than 200)? Example, what is the IUPAC nomenclature of $C_{205}H_{412}$?
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1answer
84 views

Name of a proton bonded to a hydroxyl carbon

What do you call the proton in a CH-OH configuration? When discussing an NMR spectrum, I can talk about the hydroxyl proton, but it seems clumsy to refer to "the proton on the hydroxyl carbon".
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326 views

What is the name of the “primary” carbon in a benzene derivative?

If we have a benzene with a single substituent, such as chlorobenzene, what do we call the carbon atom to which the group is attached? I'm familiar with the ortho- meta- para- nomenclature, but the ...
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255 views

Is there a standard symbol for molar density?

Is there a standard symbol for molar density, i.e. $n/V$, where $n$ is the total number of moles of every species in a system? I realise that there is standard term "molar volume", which is the ...
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274 views

What do graphene “armchair(5,5)” and “zigzag(5,0)” refer to?

I am reading some articles about the electronic properties of graphene and while reading it I came across graphene armchair and zigzag structures, which have different bond structures. The two ...
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213 views

Naming this substituted cyclohexenol

Here's the molecule: So far I've tried: 6-methylcyclohex-2-en-ol and 4-methylcyclohexen-3-ol but both are wrong. I'm rather confused as to where I should start: the alcohol or the double bond?