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3.C 2H 5 CO C 2H 5 Di-ethyl 3-Pentanone/ CH 3-CH 2-CO-CH 2-CH 3
Ketone Pentan-3-one
4.C 3H 7COCH 3 Methyl, 2-Pentanone/ CH 3-CH 2-CH 2-CO-CH 3
propyl Ketone Pentan-2-one

 Ester [R/H-COO-R’]–

o Esters are a functional groupwhere they are characterized by a carbon bound to
three other atoms:

Asingle bond to a carbon,
Adouble bond to an oxygen, and
Asingle bond to an oxygen.

The singly bound oxygen is bound to another carbon.

Examples of Ester [R/H-COO-R’]-

Chemical Common IUPAC-Name Structural formula
formula Name Suffixused-‘-one’

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