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Alkenes

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

#1
Front (Question)

What is an alkene?

Back (Answer)

Unsaturated hydrocarbon

#2
Front (Question)

Alkene general formula?

Back (Answer)

CnH2n

#3
Front (Question)

What is a stereoisomer?

Back (Answer)

Same structural formula different spatial arrangement of atoms.

#4
Front (Question)

What kind of isomerism do alkenes show?

Back (Answer)

E-Z isomerism

#5
Front (Question)

When do E-Z isomers exist?

Back (Answer)

Restricted rotation around C=C double bond. Two different groups/atoms attached to both ends of the double bond.

#6
Front (Question)

What is the priority group?

Back (Answer)

The atom with the bigger atomic number.

#7
Front (Question)

What is E isomer?

Back (Answer)

Epposite side

#8
Front (Question)

What is Z isomer?

Back (Answer)

Zame zide.

#9
Front (Question)

What is an electrophile?

Back (Answer)

An electron pair acceptor.

#10
Front (Question)

What is an addition reaction?

Back (Answer)

A reaction where two molecules react together to produce one.

#11
Front (Question)

Describe the double bonds in alkenes.

Back (Answer)

The double bonds in alkenes are areas with high electron density. This attracts electrophiles and the alkenes undergo addition reactions.

#12
Front (Question)

What is the change in the functional group in the reaction of bromine with an alkene?

Back (Answer)

Alkene -> Dihalogenoalkane

#13
Front (Question)

What is the reagents used in the reaction of bromine with an alkene?

Back (Answer)

Bromine

#14
Front (Question)

What is the condition used in the reaction of bromine with an alkene?

Back (Answer)

Room temperature (not in UV light)

#15
Front (Question)

What is the mechanism used in the reaction of bromine with an alkene?

Back (Answer)

Electrophillic addition

#16
Front (Question)

What is the carbon atom with a + charge called?

Back (Answer)

Carbocation

#17
Front (Question)

Explain why there is an attraction between a C=C double bond and Br2.

Back (Answer)

C=C has a high electron density. Br-Br becomes polarised. Br S+ is attracted to C=C.

#18
Front (Question)

What is the change in the functional group in the reaction of Hydrogen bromide with an alkene?

Back (Answer)

Alkene -> Halogenoalkane

#19
Front (Question)

What is the reagent used in the reaction of Hydrogen bromide with an alkene?

Back (Answer)

HBr or HCl

#20
Front (Question)

What is the condition used in the reaction of Hydrogen bromide with an alkene?

Back (Answer)

Room temperature

#21
Front (Question)

What is the mechanism used in the reaction of Hydrogen bromide with an alkene?

Back (Answer)

Electrophillic addition

#22
Front (Question)

What causes two products to form?

Back (Answer)

Unsymmetrical alkene

#23
Front (Question)

What is the S+ atom attracted to?

Back (Answer)

Electron rich pi bond.

#24
Front (Question)

Order of stability for carbocations?

Back (Answer)

Tertiary>Secondary>Primary