Alkenes Flashcards
What forces do alkenes experience
They are non polar so they only experience Van der waal forces
Are alkenes soluble in water?
No they are highly insoluble in water
The larger the chain of the alkene, the ____ the van der waal forces
Stronger due to more electrons so stronger VDW forces.
Can double bonds rotate?
No they have restricted bond rotations.
What are stereoisomers?
the same structural formula but the atoms have different spacial arrangement.
What is a substituent?
Anything bonded to a double carbon-carbon bond that isn’t a H
Eg. F, CH3
When the substituents are on the same side what are they called?
Z isomer
ZE ZAME SIDE
When the substituents are on different sides what do we call them?
E isomers
When a molecule has three substituents what procedure do we use?
CIP
Compare the atomic numbers of the substituents. And if they are on the same side Z and different E
Which carbocations are more stable:
Primary, secondary or tertiary
Tertiary are the most and then secondary
Test for alkenes:
Bromine water
If double bond present—-> goes from orange to colourless.
what are the two types of polymerisation?
addition polymerisation
(year 12)
condensation polymerisation
(year 13)
how do you name a polymer?
add poly(alkene)
eg. ethene—> poly(ethene)
why are polymers unreactive?
the strong c-c bond which are on polar do not corrode so cannot be broken down
what type of forces do polymers generally have?
van der waals forces.
