contains information about the structure, preparation, nomenclature, examples of selected common esters, isomerism, and its physical properties

1. ESTERS

2.  A chemical compound derive from an
acid in which at least one —OH
(hydroxyl) group is replaced by an
—OR—alkyl group.

3. STRUCT
URE OF

4.  Functional group of ester
In linear form, the ester functional
group can be represented as —COOR
or —CO2R.

5. PREPARA
TION OF

6.  Ester are produced through Esterification
ESTERIFICATION REACTION
Is the reaction of a carboxylic
acid with an alcohol ( or phenol ) to
produce an ester.

8. NOMENCLA
TURE FOR

9. Rule No. 1:
The name for the alcohol
part of the ester appears first and
is followed by a separate word
giving the name for the acid part
of the ester.

10. Rule No. 2:
The name of the alcohol part of
the ester is simply the name of the R
group (alkyl, cycloalkyl, or aryl)
present in the –OR portion of the
ester.

11. Rule No. 3:
The name for the acid part of the
ester is obtained by dropping the –ic
acid ending for the acids name and
adding the suffix –ate.

12. Cyclic Esters (Lactones)
 Hydroxyl acids compounds which
contain both a hydroxyl and a carboxyl
group have the capacity to undergo
intermolecular esterification to form cyclic
esters.

13. A lactone is a cyclic acid. The ring size in
a lactone is indicated using a Greek
letter. A lactone with a five –membered
ring is a y-lactone and one with a six-
membered ring is a δ-lactone.

14. SELECTED
COMMON

15. Flavoring Agents
Pheromones
Medications

23. PHEROM
ONES

24. A chemical substance produced
and released into the
environment by an animal,
especially a mammal or an
insect, affecting the behavior or
physiology of others of its
species.

27. MEDICAT
IONS

28. a substance used for
medical treatment,
especially a medicine or
drug.

29. Benzocaine
- a white, odorless, crystalline
powder
- used in ointments as a local
anesthetic and to protect against
sunburn

31. Structure of benzocaine:

32.  Aspirin
-is a medication used to
treat pain, fever or
inflamation.

34. Structure of Aspirin:

35.  Oil of Wintergreen
- produced by many species of plants,
particularly wintergreens.
- used in skin rubs and liniments to help
decrease pain of sore muscles.

37. Structure of Oil of Wintergreen:

38. ISOMERI
SM

39. The relation of two or more
compounds, radicals, or ions that are
composed of the same kinds and
numbers of atoms but differ from
each other in structural arrangement.

40. Ester positional isomer:
- Ethyl ethanoate
- Methyl Propanoate

41. Physical
Properties of
Esters

42. Ester molecules cannot form hydrogen bonds
to each other .
Boiling points are much lower than alcohols
and carboxylic acids of comparable molecular
mass.

43. CHEMICAL REACTIONS OF
ESTERS:
-Ester hydrolysis
- Ester saponification
(Depending on reaction condition)

44. Ester Hydrolysis
- an ester reacts with water,
producing the carboxylic acid and
alcohol from which the ester was
formed

46. Ester Saponification
- is the hydrolysis of an organic
compound under basic conditions in
which a carboxylic acids salt is one of
the products.

47. +
Na

48. THANK YOU!