Chapter 11- Alkenes Flashcards
What are electrophiles?
Describe what electrophiles do?
Give three examples of electrophiles?
Electron pair acceptors
They’re usually a bit short of electrons so they’re attracted to areas where there are lots of them about
- Positively charged ions, like H+ and NO2+
- Polar molecules- the f+ atom is attracted to places with lots of electrons.
What is the test for a double bond in an alkene (ie test for unsaturation)?
Describe how this reaction happens?
What is this reaction called?
What is the colour change for this reaction?
Shake an alkene with orange bromine water. If double bond present, the solution turns colourless
Bromine is added across the C=C double bond to form a colourless dibromoalkane
Electrophiles addition
Orange to colourless solution.
What is the definition of a carbocation?
An organic ion containing a positively charged carbon atom.
Why are carbocations with more alkyl groups more stable?
Because the alkyl groups feed electrons towards the positive charge. Therefore the more stable carbocation is much more likely to form.
