Organic chemistry deals with carbon compounds, especially hydrocarbons which contain only carbon and hydrogen. Alkenes are unsaturated hydrocarbons containing a carbon-carbon double bond. They can be produced through the dehydration of alcohols, which removes a water molecule, or through the dehydrohalogenation of alkyl halides, which involves heating the alkyl halide with an alcoholic solution of potassium hydroxide to eliminate hydrogen halide and form an alkene.

1. Made By
Mayank Bisht
2367
Chem (H) I -A

2. ORGANICCHEMISTRY

3. TOPIC SLIDE NO.
INTRODUCTION 5
ALKENES 6
DEHYDRATIONOF ALCOHOLS 7
DEHYDROHALOGENATION OF ALKYL
HALIDE
10

5. ORGANIC CHEMISTRY :- is defined as the
branch of chemistry that deals with carbon
compounds containing usually hydrogen and
one or more additional elements like oxygen,
nitrogen, sulphur, halogens, phosphorous , etc
. Organic compounds made up of only carbon
and hydrogen atoms are called hydrocarbons
and all other organic compounds may be
regarded to have been derived from these
hydrocarbons by replacement of one or more
of their hydrogen atoms by other atoms or
groups .

6. Acyclic unsaturated hydrocarbons containing a carbon – carbon
double bond are called alkenes . They are also called as olefins (
oil forming ) since the lower members of this class such as ethene
, propene etc .produce oily products on reaction with halogens
such as chlorine and bromine . The C-C bond in alkenes is Sp2
hybridized .

10. Alkyl halides when heated with alcoholic solution of potassium
hydroxide eliminate a molecule of hydrogen halide to yield olefins
.
Saytzeff rule :- whenever two alkenes are theoretically possible
during a Dehydrohalogenation reaction it is always the more