A level Chemistry help

I am working on E-Z isomers of 3-methyl-pent-2-ene
Why does the E-isomer have the two CH3 on the same side??

it might be easier to think about how the priority groups are CH3 from one carbon and C2H5 from the other carbon so those will be together in the Z isomer.

(edited 10 months ago)

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Reply 2

Darkwings_Lok

Original post by nnnn6666

it might be easier to think about how the priority groups are CH3 from one carbon and C2H5 from the other carbon so those will be together in the Z isomer.

thanks
its annoying that we arent taught about the difference between cis-trans and E-Z, we are just told that they are the same thing but different names(sign :s-smilie:

Reply 3

nnnn6666

Original post by Darkwings_Lok

thanks
its annoying that we arent taught about the difference between cis-trans and E-Z, we are just told that they are the same thing but different names(sign :s-smilie:

unless the question specifically asks u about cis/trans i think it’s best u always talk about E/Z isomers. they’re not exactly the same eg. with cis isomers the groups on the same side must be identical whereas with Z the groups on the same side are the higher priority groups. for ur example, the two CH3 groups on the same side would be cis but it’s actually an E isomer! :smile: