Linked Questions

1 vote
1 answer
56 views

Alkyl halide nomenclature, flouthane [duplicate]

The IUPAC name for flouthane is 2-bromo-2-chloro-1,1,1-triflouroethane. i am confused why did not we assign the numbering to the carbon chain the other way possible that would make the name as 1-bromo-...
Abdullah's user avatar
  • 117
8 votes
2 answers
39k views

What is the priority for numbering alkyl side chains?

I'm wondering why the above image is named 5-ethyl-3,3-dimethylheptane rather than 3-ethyl-5,5-dimethylheptane. I thought an ethyl substituent has a higher priority (I know this is true when arranging ...
user2757765's user avatar
1 vote
2 answers
7k views

What is the correct IUPAC name of this compund?

I thought C=C is the "functional group" here and Br is a substituent so the numbering should start from the top left C, making the name 4-Bromo-3-methylbut-2-ene, but my book says 1-Bromo-2-methylbut-...
Rick's user avatar
  • 387
10 votes
1 answer
12k views

Nomenclature of a cyclohexyl ether and locant position enumeration

As far as I know, 'ethoxy' should be given the locant '1' as it is a functional group. The compound should thus be named 1-ethoxy-2,2-dimethylcyclohexane. However, I was told that the correct name is ...
agdhruv's user avatar
  • 719
16 votes
1 answer
1k views

Alphabetization rule in case of consecutively placed substituents

This is the compound: I am stuck on assigning the locants to the given halo substituents. We know that all halogens are of equal priority. So, using first point of difference, we get either an $\ce{I ...
Gaurang Tandon's user avatar
5 votes
1 answer
1k views

Naming tetrahalogenated benzene

ChemSketch generates the IUPAC name of the compound above as "2-bromo-1-chloro-5-fluoro-3-iodobenzene" but I have a different answer. I know that I have asked a related question before as well. The ...
Gaurang Tandon's user avatar
0 votes
1 answer
2k views

Clarification on IUPAC nomencalture

This is 1,6-dimethyl-cyclohexene. Why cannot this same structure have the IUPAC name 1,2-dimethyl-cyclohexene. In the given picture the locant sum comes to 7 but in my case it comes to 3, implying ...
J_B892's user avatar
  • 827
-4 votes
2 answers
5k views

IUPAC nomenclature for many multiple bonds in an organic compound molecule

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 ...
MrAP's user avatar
  • 775
1 vote
1 answer
552 views

Nomenclature of an alkyne with bromo and hydroxy substituents

Is the IUPAC name of above compound 7,7-dibromo oct-5-yn-4-ol or 2,2 dibromo oct-3-yn-5-ol ? I understand that the former name is given keeping in mind -OH as the functional group but by giving the ...
BSDC's user avatar
  • 11
0 votes
3 answers
3k views

First point of difference rule 1,6-dimethylcyclohex-1-ene [duplicate]

According to the first point of difference rule, second one should be correct right?
Siva Raja Ganesh's user avatar
-1 votes
1 answer
420 views

IUPAC nomenclature of organic compound

I strongly feel that the answer should be option (1) as the ester functional group has a greater preference over the double bond and hence it should get a lower locant. But the source of the question ...
suhridi sen's user avatar
1 vote
1 answer
485 views

Clarification of IUPAC name [duplicate]

Is the IUPAC name of $\ce{CH3CH=CH-C#CH}$ pent-3-en-1-yne or pent-2-en-4-yne?
Abdul Khan 's user avatar
-1 votes
1 answer
763 views

Naming a hydrocarbon chain with multiple substituents equidistant from both terminals

Does the substituent that comes alphabetically first take precedence, or do we look for the next nearest substituent, or is it a combination of both?
Abrar Marufi's user avatar
0 votes
1 answer
463 views

If there are two longest chains possible in an organic compound and both have the same number of substituents, how do we decide the parent chain? [duplicate]

Is the parent chain in the above case determined by atomic mass, alphabetical preference or any other rule?
the_random_guy42's user avatar
0 votes
1 answer
74 views

IUPAC Name clarification [closed]

$\ce{CH3-CH(F)-CH2-CH2-CH(C2H5)-CH2-CH3}$ Will the correct IUPAC name be 3-ethyl 6-fluoro heptane or 5-ethyl 2-fluoro heptane?
user66802's user avatar