3.4 - Alkenes

Question 1

Uses of poly(styrene)?

Answer 1

|> Insulated fast food containers

|> Packaging

Question 2

What are the Cahn-Ingold-Prelog Priority Rules?

Answer 2

|> Atom w/ highest atomic number has highest priority

|> First point of difference on chain used to assign priority

Question 3

What is the Positive Inductive Effect?

Answer 3

Alkyl groups (CH) have tendency to release electrons, helping to stabilise charge of carbocations

Question 4

Uses of poly(1,1-dichloroethene)?

Answer 4

|> Shower Curtains

|> Plastic Films

Question 5

Uses of Polypropene?

Answer 5

Food Containers

Question 6

Uses of poly(prop-2-enenitrile)?

Answer 6

Synthetic Fibres

Question 7

What are the conditions for E/Z isomerism?

Answer 7

Each carbon atom of carbon-carbon double bond is bonded to 2 different groups

Question 8

What does the Hydrogenation of alkenes produce?

Answer 8

Alkanes (e.g. Margarine)

Question 9

Define: Unsaturated Hydrocarbon

Answer 9

Hydrocarbon that contains one or more double bonds

Question 10

What is the general equation for Polymerisation?

Answer 10

n HRC=CRH |> -(-C(H,R)-C(H,R)-)- n

Question 11

Shape an Bond Angle around a C=C bond?

Answer 11

Trigonal Planar

120°

Question 12

What is the most stable carbocation?

Answer 12

3° (tertiary)

Question 13

What is the formula for Cycloalkenes?

Answer 13

CnH₂n₋₂

Question 14

More stable carbocations are ____ to form?

Answer 14

More likely

Question 15

Why does the C=C group contain π bonds?

Answer 15

Overlapping p-orbitals

Question 16

How is a secondary carbocation shown?

Answer 16

2°

C with a positive charge bonded to two other C atoms

Question 17

Define: Stereoisomers

Answer 17

Compounds with same structural formula but a different arrangement of atoms in space

Question 18

Define: Hydrolysis

Answer 18

Breaking of a Bond using Water

Question 19

How is a primary carbocation shown?

Answer 19

1°

C with a positive charge bonded to one other C atoms

Question 20

Define: Structural isomers

Answer 20

Compounds with the same molecular formula but a different structural formula

Question 21

Define: Electrophile

Answer 21

An electron pair acceptor

Question 22

Uses of Polytetrafluoroethane (PTFE) ?

Answer 22

Non-stick pans

Question 23

How is a tertiary carbocation shown?

Answer 23

3°

C with a positive charge bonded to three other C atoms

Question 24

What is the general formula for Alkenes?

Answer 24

CnH₂n

Question 25

What does the presence of a π bond mean?

Answer 25

Restricted rotation about the planar C=C bond