Question

Name the following:

Short answer

a. IUPAC name: (E)-3-methyl-hex-3-ene.

b. IUPAC name: (E)- 8-methyl-non-4-ene.

c. IUPAC name: (E)-9-bromo-non-2-ene.

d. IUPAC name: 2,4 dimethyl-pent-1-ene

e. IUPAC name: 2-ethyl-pent-1-ene.

f. IUPAC name: (Z)-pent-2-ene.

Step-by-step solution

Rules of IUPAC nomenclature

There are some rules to be followed for the naming of a structure and these are given as follows,

1. Finding the longest chain.
2. Numbering the chain according to the priority order of double bond, triple bond, and functional group.
3. the functional group should be written in alphabetical order means if there is a methyl and ethyl group, put the ethyl group at 1^st as e comes earlier than m in Alphabets.

E, Z nomenclature

1. When a double bond has the same priority number on the same side, the structure is called Z nomenclature.
2. When a double bond has the same priority number on the Opposite side, the structure is called E nomenclature.

 Step 3: IUPAC names of the given compounds

The systematic and common names are given below, using the IUPAC rules.1^st we have leveled the longest chain considering the position of the functional group, and then it is written in alphabetical order.

IUPAC name: (E)-3-methyl-hex-3-ene. IUPAC name: (E)- 8-methyl-non-4-ene.

IUPAC name: (E)-9-bromo-non-2-ene. IUPAC name: 2,4 dimethyl-pent-1-ene

IUPAC name: 2-ethyl-pent-1-ene. IUPAC name: (Z)-pent-2-ene.