(E)-1,1-Bromochloropropene and (Z)-1,1,Bromochloropropene

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Natalie Yakobian
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(E)-1,1-Bromochloropropene and (Z)-1,1,Bromochloropropene

Postby Natalie Yakobian » Sat Feb 27, 2016 3:38 pm

Can someone please explain the difference between (E)-1,1-Bromochloropropene and (Z)-1,1,Bromochloropropene . Why are the not both E because the propriety groups are on the same side.

Thanks so much!

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Re: (E)-1,1-Bromochloropropene and (Z)-1,1,Bromochloropropen

Postby Chem_Mod » Sat Feb 27, 2016 5:08 pm

1-bromo-1-chloropropene is a double bond with the four groups:

the left side has: Br, Cl
the right side has: CH3, H

On each side, determine the higher priority. Br > Cl and CH3 > H (by atomic mass)

Thus, (E) or (Z) describes the relative orientations of Br and CH3

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