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Topic: Naming molecules (combining E/Z and R/S)  (Read 12029 times)

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Offline jkulier

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Naming molecules (combining E/Z and R/S)
« on: June 07, 2009, 10:07:29 PM »
Hi there,

I am just wondering... if a molecule's name has both E/Z and R/S specifications, which would come first?

For example:

(1R,2R)-(3E)-2-methyl-3-hexen-1-ol
OR
(3E)-(1R,2R)-2-methyl-3-hexen-1-ol?

Thanks in advance!

Offline sjb

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Re: Naming molecules (combining E/Z and R/S)
« Reply #1 on: June 08, 2009, 02:44:29 AM »
Hi there,

I am just wondering... if a molecule's name has both E/Z and R/S specifications, which would come first?

For example:

(1R,2R)-(3E)-2-methyl-3-hexen-1-ol
OR
(3E)-(1R,2R)-2-methyl-3-hexen-1-ol?

Thanks in advance!

I think the E/Z descriptors come first. See, e.g. http://goldbook.iupac.org/ or similar. Are you sure about that name, or have you just made it up to show a point, as it seems wrong?

Offline jkulier

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Re: Naming molecules (combining E/Z and R/S)
« Reply #2 on: June 08, 2009, 08:10:54 PM »
I actually made up the name, so it's likely that it doesn't make much sense. Thank you though!  ;D

Offline 0rion

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Re: Naming molecules (combining E/Z and R/S)
« Reply #3 on: June 13, 2009, 09:49:15 PM »
Yeah my Professor said to put isomerism before chirality (E,Z)... btw yeah, there is no stereocenter at (1R) in your molecule XD

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