4.1.3 Steroisomerism

Question 1

what is steroisomers

Answer 1

molecules with the same structual formula but the atoms are arranged differently in a given space

Question 2

why do stereoisomerism occure around double bonds

Answer 2

due to the double bond there is a pi bond above and below so the atoma are fixed on both sides and cant move across the bouble bond

Question 3

when can E/Z isomers occur

Answer 3

1. When a double bond C=C

2. on each side there is different atoms so on one side different and cant be the same

Question 4

When can it be cis/ trans

Answer 4

Same 2 rules as E/Z but also one of the goups on each side NEEDS to be H

Question 5

is cis a E or Z isomer

is trans a E or Z isomer

Answer 5

cis is a Z isomer due to the same group on the same side

trans is E isomer as the same group is on the opposite sides

Question 6

what is the cahn-ingold prelog rule used for and how do you use it

Answer 6

used for assigning pripoity to atoma so we can name an isomer E or Z
you give prioperity depending on its atomic number and if both priority ones are on the same side = Z but is opposite = E

Question 7

what do you do to assign priority if both the atoms are almost identical on the same side or on opp sides

Answer 7

go through the molecule and see the difference is the molecule then find the priority of that diff one only.