4.1.3 Addition reactions of alkenes

Question 1

what type of reaction is electrophilic addition?

Answer 1

an addition reaction

Question 2

what are the reactants in electrophilic addition?

Answer 2

alkenes and hydrogen

Question 3

what are the products in electrophilic addition?

Answer 3

alkanes

Question 4

what conditions are required for electrophilic addition?

Answer 4

nickel catalyst

Question 5

what is an electrophilic reaction sometimes known as?

Answer 5

hydrogenation reaction

Question 6

what are haloalkanes?

Answer 6

organic compounds with single bonds only and halogen functional groups

Question 7

alkenes + halogens—>

Answer 7

dihaloalkanes

Question 8

alkenes + hydrogen halides—>

Answer 8

monoalkanes

Question 9

example of electrophilic addition to test for unsaturation

Answer 9

bromine water
—-> dihaloalkane

Question 10

what are alcohols?

Answer 10

organic compounds with a hydroxyl functional group (OH)

Question 11

alkenes + steam—>

Answer 11

alcohols

Question 12

what is required to make alcohols from alkenes?

Answer 12

an acid catalyst

Question 13

what is a electrophile?

Answer 13

an electron pair acceptor

Question 14

does the carbon carbon double bond in alkenes have high or low bond enthalpy?

Answer 14

relatively low

Question 15

are alkenes relatively reactive or unreactive?

Answer 15

due to the cc double bond having relatively low bond enthalpy, alkenes are relatively reactive

Question 16

what happens in an addition reaction of alkenes?

Answer 16

the cc double bond opens and forms new bonds with other atoms

Question 17

why is the cc double bond broken?

Answer 17

the cc double bond has a π- bond, which is an area of high electron density and attracts electrophiles