3.4 - Alkenes Flashcards
Uses of poly(styrene)?
|> Insulated fast food containers
|> Packaging
What are the Cahn-Ingold-Prelog Priority Rules?
|> Atom w/ highest atomic number has highest priority
|> First point of difference on chain used to assign priority
What is the Positive Inductive Effect?
Alkyl groups (CH) have tendency to release electrons, helping to stabilise charge of carbocations
Uses of poly(1,1-dichloroethene)?
|> Shower Curtains
|> Plastic Films
Uses of Polypropene?
Food Containers
Uses of poly(prop-2-enenitrile)?
Synthetic Fibres
What are the conditions for E/Z isomerism?
Each carbon atom of carbon-carbon double bond is bonded to 2 different groups
What does the Hydrogenation of alkenes produce?
Alkanes (e.g. Margarine)
Define: Unsaturated Hydrocarbon
Hydrocarbon that contains one or more double bonds
What is the general equation for Polymerisation?
n HRC=CRH |> -(-C(H,R)-C(H,R)-)- n
Shape an Bond Angle around a C=C bond?
Trigonal Planar
120°
What is the most stable carbocation?
3° (tertiary)
What is the formula for Cycloalkenes?
CnH₂n₋₂
More stable carbocations are ____ to form?
More likely
Why does the C=C group contain π bonds?
Overlapping p-orbitals
How is a secondary carbocation shown?
2°
C with a positive charge bonded to two other C atoms
Define: Stereoisomers
Compounds with same structural formula but a different arrangement of atoms in space
Define: Hydrolysis
Breaking of a Bond using Water
How is a primary carbocation shown?
1°
C with a positive charge bonded to one other C atoms
Define: Structural isomers
Compounds with the same molecular formula but a different structural formula
Define: Electrophile
An electron pair acceptor
Uses of Polytetrafluoroethane (PTFE) ?
Non-stick pans
How is a tertiary carbocation shown?
3°
C with a positive charge bonded to three other C atoms
What is the general formula for Alkenes?
CnH₂n
What does the presence of a π bond mean?
Restricted rotation about the planar C=C bond
