Name this compound (orgo)

[Sea of ASH]

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?

 

[tranv117]

2-bromo,2-butene?

 

[Sea of ASH]

i ment the E or Z part

 

[211183]

Z

 

[Contach]

z fosho

 

[Lazerous]

i ment the E or Z part

E or Z is used to denote how the two heaviest (molecular weight) groups relate to one another on either side of an alkene.

E is used when they are opposite of one another. Z is when they are on the same side as one another.

In this case. Bromine has the largest molecular weight on the right side of the double bond, and CH3 has the largest molecular weight on the left side of the double bond. They are both on the same side of the molecule so they must have Z/Zaitsev/Zame Zide orientation. Capiche?

 

[Sea of ASH]

yup its Z

laz, watch out its not MW! the higher the ATOMIC NUMBER gets the higher priority!

 

[Contach]

uum... relax there guy..

atomic number is basically proportional to molecular weight.. find me a pair of elements that this isn't true.

 

[Lazerous]

yup its Z

laz, watch out its not MW! the higher the ATOMIC NUMBER gets the higher priority!

OK, looking at the picture originally posted. Lets switch out that -Br for -CH2Br and also switch out the CH3 right above it for -Br, kind of like this:

H-C=C-BR

| |
H3C CH2Br


So what would it be now?
​

 

[Lazerous]

uum... relax there guy..

atomic number is basically proportional to molecular weight.. find me a pair of elements that this isn't true.

I was going to post the same thing until I realized he might be talking about the first element only....

 

[Lazerous]

OK, looking at the picture originally posted. Lets switch out that -Br for -CH2Br and also switch out the CH3 right above it for -Br, kind of like this:

H-C=C-BR

| |
H3C CH2Br


So what would it be now?
​

Anyone?

 

[Sea of ASH]

its E

even though Br has a lower MW than CH2Br it has higher priority


Contach, the side-effects are kickin in huh?

 

[achilles2]

even if you had -CHBR for in place of the -CH3 on the BR side it would still be Z

you go my molecular weight of the first attachement in the case of -CH2BR vs -Br the Br weighs more then the C on -CH2Br

 

[Andre3k]

Its E

you DONT go by MW you go by Atomic #.

Example if you have CH3Br and Br, CH3Br has the higher MW. However Br gets the priority over CH3 because it has the higher Atomic #.

 

[jdent]

its E

 

[msavaya]

?

How do you attach a thumbnail like that...where the picture shows on the post and you don't have to click and download the file?

 

[klutzy1987]

The original question is
Z-2 bromo 2 butene

The second version is E

Dont have patience to sift through all the posts and find the correct answer.