Alkenes Flashcards
Alkene formula
CnH2n
What two type of bonds do alkenes contain and how are these formed
Sigma bond-formed by head-on overlap of atomic orbitals
Pi bond- formed by partial sideways overlap of p orbitals
Why can alkenes form stereoisomers and E/Z isomers
As the atoms have restricted rotation about the double bond
What is an electrophile
An electron acceptor that accepts electrons to form a covalent bond
Conditions for hydration of alkenes and what is produced
Add steam and need high pressure and moderate temperature and phosphoric acid catalyst to produce alcohol
Conditions for hydrogenation reaction of alkenes and what is produced
Add hydrogen with nickel catalyst at 150 degrees Celsius to produce equivalent alkane
What is halogenation of alkenes
When a halogen is added across the double bond so double bond is lost
What is the test for alkene
Add to orange bromine water and decolourises as 1,2-dibromoalkane formed
