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Summary AQA A level chemistry alkanes full revision notes
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A helpful and comprehensive set of revision notes covering the entire alkenes unit of AQA A level chemistry
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Akenesl4.| ALIKENES 4.2 REACTIONS Of AIKENES
Akenes are unsaturated hudrocahons. They are reoctve due to high eletron dens bu
around the double bond General formula- ChHyn
Double bonds con't olate. JThis s due to a t
orbital
cloud ot electron densts above ond kelow the
Sge bond
Geometricad lsomers
Same structural fornmula, dufferent aranemCnt of atums in space
CHa E-Z 1sOnerism
s_plority qroupson same sde
H CH EIs puorits qroups on d1ffereat
7-but-2- ene E-but-2-ene sidea
Peiority gcoup due to atamc number
-
Phusical Properties
-Only ntermalecular torce is Van der Waals
-
Melting
Allkenes
Cnd bolna pont uncrease with aumber of cacbon atons
ure not soluble n water
Electroph1lc Ad1tion Reactions
O Electrophile s attracted to double bond
9 Electropaile is posibvely chacged andaccept
pair of electrons frona double bond
9 Acacbocatian s formed
e Negatiuely chorged ion forms a band
ith the carbocation
H H
H
Br
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