11.3

Question 1

Define “isomers” (2)

Answer 1

(1) molecules that have the same molecular formula
(2) but a different arrangement of atoms

Question 2

What are the 2 types of isomers? (2)

Answer 2

(1) structural isomerism
(2) stereoisomerism

Question 3

What are the 3 types of structural isomers? Define each. (3)

Answer 3

(1) Positional —> (4) same functional groups attached to the main chain at **different points
(2) Functional group —> (5) different functional groups
(3) Chain —> (6) different arrangement of the hydrocarbon chain such as **branching **

Question 4

Define “stereoisomerism” (3)

Answer 4

(1) 2 or more compounds
(2) have the same structural formula
(3) but a different arrangement of bonds

Question 5

What are the 2 types of stereoisomerism? (2)

Answer 5

(1) E-Z isomerism
(2) optical isomerism

Question 6

What does E-Z isomerism tell you about? (2)

Answer 6

(1) the positions of substituents
(2) at either side of a carbon–carbon double bond

Question 7

In E-Z isomerism, the two substituents may either be on the same side of the bond ___ (___) or on the opposite sides ___ (_____). (4)

Answer 7

(1) Z
(2) cis
(3) E
(4) trans

Question 8

Substituted groups joined by a single bond can ________ around the single bond so there are ____ isomers. But there is ___ __________ around the double bond so Z & E isomers are ______________ compounds and are not easily ______________ from 1 to the other. (5)

Answer 8

(1) rotate
(2) no
(3) no rotation
(4) separate
(5) converted