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Topic: Nomenclature  (Read 2647 times)

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Offline Bassel

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Nomenclature
« on: October 22, 2013, 12:41:08 PM »
There is an alkane compound that has a ramification but when we wrote the name it wasn't written with the prefix "iso" I still remember that the professor said something about when do we consider a branch iso and when not but i totally forgot. Anyone Has an idea? thank you

Offline Archer

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Re: Nomenclature
« Reply #1 on: October 22, 2013, 01:52:28 PM »
If there are substituents within the group then systematic names must be followed to derive the name.

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Offline Archer

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Re: Nomenclature
« Reply #2 on: October 22, 2013, 02:31:58 PM »
There is an alkane compound that has a ramification but when we wrote the name it wasn't written with the prefix "iso" I still remember that the professor said something about when do we consider a branch iso and when not but i totally forgot. Anyone Has an idea? thank you

Could you provide your example?
“ I love him. He's hops. He's barley. He's protein. He's a meal. ”

Denis Leary.

Offline Bassel

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Re: Nomenclature
« Reply #3 on: October 22, 2013, 03:27:35 PM »
thanks for your help

Offline Bassel

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Re: Nomenclature
« Reply #4 on: October 22, 2013, 03:31:08 PM »
why isn't the ramification on carbon 6 considered iso? also at carbon 4? i am not understanding iso naming very we'll

Offline Archer

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Re: Nomenclature
« Reply #5 on: October 22, 2013, 04:19:41 PM »
How would you have named this?
“ I love him. He's hops. He's barley. He's protein. He's a meal. ”

Denis Leary.

Offline kriggy

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Re: Nomenclature
« Reply #6 on: October 23, 2013, 01:42:34 AM »
why isn't the ramification on carbon 6 considered iso? also at carbon 4? i am not understanding iso naming very we'll
http://www.acdlabs.com/iupac/nomenclature/79/r79_36.htm

Archer basicly said that already:
The following names are retained for unsubstituted hydrocarbons only:
Isobutane   
Isopentane   
Neopentane   
Isohexane   
The link might help you understanding how to name your compounds.

Offline Archer

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Re: Nomenclature
« Reply #7 on: October 23, 2013, 02:39:55 AM »

The following names are retained for unsubstituted hydrocarbons only:
Isobutane   
Isopentane   
Neopentane   
Isohexane   


Other examples, approved by IUPAC include:

Isopropyl,
sec-butyl,
tert-butyl,
tert-pentyl,


“ I love him. He's hops. He's barley. He's protein. He's a meal. ”

Denis Leary.

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