Nomenclature Definition and 104 Threads

The question in the summary refers to While I am here, I might as well be hanged for a sheep as for a lamb, so another question that will reveal the fact that I am relatively new to organic chemistry nomenclature refers to the following diagram: Why is one hydroxide given priority over the...

Consider the compounds 1-Bromo-2-(bromomethyl)butane and 2-Ethyl-1,3-propanediol As can be seen they are structurally similar compounds. The first has bromine substituents and the second has hydroxyl substituents. My question is why does one have a butane base chain whilst the other has a...

In this question, I am not sure as to which of the following two chains should be considered as the principal chain. Approach 1 (7 carbon chain, 2 substituents): 4-methyl-4-(1,1-dimethylethyl)heptane Approach 2 (6 carbon chain, 4 substituents): 2,2,3-trimethyl-3-propylhexane Clearly, the...

Hello, I just learned the bases of IUPAC nomenclature and I couldn't find a good and reliable resource for problems to practice. if you know one please share it with me . thanks.

The LHCb collaboration at the Large Hadron Collider has developed a new set of rules for naming composite particles bound by the strong force (i.e. hadrons) that are contemplated by existing rules for naming them. This has significant practical relevance to anyone dealing with high energy hadron...

It is very important to recognize that, in general, the rules of the nomenclature of organic compounds are written in terms of classical valence bonding and do not imply electronic configurations of any kind. [Mentor Note -- Representative link added below]...

When there is both alkyl substituent and ethoxy substituent in a single molecule, which one should be prioritized when numbering your base carbon chains? I am confused because the first structure below seems to have numbered the carbon attached to ethyl as the first carbon, while the second...

I think S2Cl2 and SCl are the same thing, and SCl actually simpler and concise, so why do we have disulfur dichloride ?

I tried drawing the structure, and I do not know which one of the two is the correct compound for the nomenclature. Which one would be the correct one, and why? Thank you!

How would I name the following two compounds? My guess is that the first one would be 3-bromophenyl 1-chloro ketone and the second one (4Z)-3-sec butyl-hex-4-en-1-yne. Am I correct? Thank you

The following structure was given, and I have to name the compound. My guess is that the compound is called 3-bromo phenyl chloro ketone, but I am not sure. Can you tell me if my answer is correct, and also tell me how to tackle the IUPAC naming for this compound? Thank you!

The following structure was given, and the answer was (z)-1-bromo-2-chloro-2-fluoro-1-iodoethene. But how do you decide which carbon is numbered 1 and the other 2? Thank you.

I thought that the compound would be named 2-bromo-propan-1-ol, but the answer sheet says that it is 3-bromopropanol. But don't you have to indicate the position of the OH group with carbon numbers? My textbook says that CH3CH2CH2OH would be named 1-propanol. Here, it seems like the position of...

I understand the first one, which indicates that there is a phenyl group in the second carbon of pentane. But where did the 2 in 2-pentylbenzene come from? Shouldn't if it be just pentylbenzene, since there is only one subtitute(pentane) on the benzene? If not, would you explain why? Thank you.

The picture above is the correct answer, but I do not understand why. I thought that the OH group on the top has to be prioritized and be numbered 1. But then, the structure would have to be named 2,4,6-trimethylphenol, not 1,3,5-trimethylphenol. For example, 4-chloroaniline structure looks...

Is the phase factor in : ##e^{i\phi}\Psi(x)## a constant or a global phase factor called ?

Can I say that the Lorentz metric is the specific form ##-c^2dt^2 + dx^2 + dy^2 + dz^2## whereas the Minkowski metric is the metric of Minkowski space which can take the Lorentz form I just gave, but can also, e.g., be written in spherical coordinates?

Homework Statement Which name is more correct, 2-oxo-cyclopentanitrile or 2-cyano-cyclopentanone 2. The attempt at a solution The priority of CN group is higher than ketone, so the first name should be correct but the second name is mentioned in my textbook

Homework Statement My only doubt while solving a larger problem is whether 4-Ethyl,3,3-Dimethyl Hexane and 3-Ethyl,4,4-Dimethyl Hexane equivalent?

As per IUPAC Nomenclature of Inorganic Chemistry, the correct name of the edta chelate is $$\text{2,2′,2″,2′″-(ethane-1,2-diyldinitrilo-} κ^2 \text{N)tetraacetato-}κ^4O $$ As far as I know, edta coordinates through Nitrogen and Oxygen atoms, and there is no metal-carbon bond. On the other hand...

I could finally get a copy of the Red Book 2005 from a library. In the chapter dedicated to nomenclature of coordinate complexes, while explaining the κ-system of specifying donor atoms, the following two examples were given (among many others): Can anyone explain how the naming is done for...

Hi. What do I call Instance Classes, Interface, Abstract Classes, Partial Classes, Static Class, Sealed Class collectively? Thanks.

Homework Statement Sodium chlorate(I) Sodium chlorate(V) Potassium nitride(III) Phosphorus(III) chloride Magnesium iodate(I) Homework Equations None The Attempt at a Solution I know the number in the bracket refers to what's before it, i.e. in sodium chlorate(V), the (V) means that the...

My previous Chemistry teacher while teaching IUPAC nomenclature said that the double bond is always given greater priority over the triple bond and the numbering of the carbon atom chain is done in such a way that the double bond gets the lowest possible number while my present Chemistry teacher...

Homework Statement Need help naming these 2 molecules: Homework EquationsThe Attempt at a Solution I think they are: ethoxycyclohexane 5-chloro-2-ethenyl-4-iodobenzonitrile

Homework Statement "For the given series, write formulas for the sequences an , Sn, Rn and find the limit as n->∞ (if it exists) Homework Equations ∑∞1 ((1/n) - 1/(n+1) The Attempt at a Solution I know how to take the limit, that's no problem. I'm a bit confused about what an , Sn, Rn are...

5-ethyl-4-methyloctane. Why can't we name this compound as 4-ethyl-5-methyloctane?

Hi everyone. I was bashing my head against this compound. I thought that the correct name for it was 4-ethyl-1-heptanol since apparently the longest parent chain has eight carbons. Could anyone please advise if my answer is correct, and if not, what I did wrong? Thanks in advance

Homework Statement Name the following molecule by the IUPAC system of nomenclature. Homework Equations There are some rules. To name bicyclic alkanes, you follow these three steps: 1- Count the total number of carbons in the entire molecule. This is the parent name (eg. ten carbons in the...

In eigenvectors, eigenvalues, eigenanalysis...why the word eigen and what's the history, how did these things come to have the prefix eigen? My best hunch is that the German word "eigen" means "own"...but that's not very illuminating.

Hey guys, quick question. I got confused in some nomenclature between some books and wanted to clarify somehow. A book I have has I=Mk^2 as defining a radius of gyration. Is this the same as I-mr^2? Terminology was just confusing me.Thanks guys.

Homework Statement Homework Equations n/a The Attempt at a Solution ##y'=f(x.y)## is a function of two variables. ##y=y(x)## is a function of only one variable. How can they be related? Clearly ##y(x) = f(x) \neq f(x,y)## Thanks

How is this nomenclature read and what is the meaning of the alpha and the n? quote below In terms of the absolute 182Hf abundance, howevever, only AGB (asymptotic giant branch) models of mass ~2 to 4 solar masses are major producers of s process 182Hf in the Galaxy, owing to the combined...

Homework Statement Give the IUPAC nomenclature of the following compound (in the attachment) (sorry, i don't know why the picture has become upside down!) The Attempt at a Solution Shouldn't the answer be 1-phenyl-2,3-dibromopentane? The book says it is 2,3-dibromo-1-phenylpentane.

Is an electron anti neutrino and a positron neutrino the same thing?

Just for fun, I tried enumerating the topologies on n points, for small n. I found that if the space X consists of 1 point, there is only one topology, and for n = 2, there are four topologies, although two are "isomorphic" in some sense. For n = 3, I I found 26 topologies, of 7 types. For n...

Homework Statement Provide an acceptable name for the alkane shown below. Homework Equations N/A The Attempt at a Solution I never get these right but...my guess would be 2-dimethyl-5-butononane? My reasoning: the longest carbon chain has 9 carbons so the base name would be nonane, there...

I'm seeing a version of the potential as -Ze^2/4πεr. My question is what exactly does the Ze^2 refer to? I think the e^2 is supposed to represent the proton and the neutron, and the Z is supposed to represent the number of protons, but I'm not sure how to read it. Does e refer to the charge...

What are the rules for choosing main branch ? Wikipedia states - "Identification of the parent hydrocarbon chain. This chain must obey the following rules, in order of precedence: 1 It should have the maximum number of substituents of the suffix functional group. By suffix, it is meant that...

So I'm studying for my CM final and in looking over the section on ignorable coordinates and generalized momenta I come across the definition for conjugate momentum p_{i} = \frac{\partial L}{\partial \dot{q_{i}}} My question is simple - why is it called 'conjugate'? I just never really thought...

I'm curious as to why steam tables typically present liquid properties with an "f" subscript, such as ρf.The gas properties use a "g" subscript, so I would expect the liquid properties to use "l". My first guess at the meaning of the "f" would be that it means "fluid", but this wouldn't make...

Homework Statement Write the formula of : lead(2) permanganateHomework Equations The Attempt at a Solution So I know that this formula is the combination of lead magnesium and oxygen. I know that the -ate suffix means that it has the most number of oxygen ions possible. The answer was Pb...

Homework Statement What if we stuck with the IUPAC name and called the isopropyl group a 1-methylethyl group? That would definitely reverse the alphabetical priorities; because the substituents here on the hydrocarbon are on equivalent positions, we must give the lower number to the...

Hello, I am wondering why the inverting terminal is the negative terminal and the non-inverting terminal is the positive terminal by name?

Homework Statement Give the name for the given molecule Homework Equations Following IUPAC rules for alkene nomenclature... The Attempt at a Solution (Z)-3-methyl-3-butene Might be an isobutene? Any help is well appreciated, thank you!

I think one of the most important aspects of learning is knowing how to organize information in your head. And after all this time I realized I don't know the rules behind chemical nomenclature as well as I should; for instance, I can name chemical compounds just 'cause, having no idea why that...

I'm writing a paper and run into the issue that co-authors claim that certain genes have different names as a protein :confused: Like the CREBBP gene, encodes CRB protein? As far as I know the gene encodes for a single protein, who in the right mind would give it a different name? I'm for...

It's common to express phase differences between two sinusoidal waveforms as a "phase angle", with a full cycle corresponding to 360 degrees. What is the origin of this nomenclature, and why is phase expressed in degrees? Examined naively, the time domain representation of two waveforms...

From the perspective of mathematical philosophy, what is the difference between a "theorem" and a "law"? In particular, I'm wondering if there is a difference between what makes the Pythagorean Theorem a "theorem" and the Law of Cosines a "law". Thanks.

Homework Statement (see uploaded attachment for picture). I basically have to name this molecule. The Attempt at a Solution I don't know where to start counting for the longest carbon chain and I'm not sure if it's a nonane or octane. If you guys can help it'd be much appreciated