Write the structural formula & IUPAC name of following compounds : (i) neo-Pentyl bromide (ii) methyl terti-butyl ether

To tackle the structural formulas and IUPAC names of neo-pentyl bromide and methyl tert-butyl ether, let’s break down each compound step by step.

neo-Pentyl Bromide

neo-Pentyl bromide is an organic compound that belongs to the class of alkyl halides. The term "neo" indicates a specific branching in the carbon chain. To visualize this, let’s first understand its structure.

Structural Formula

neo-Pentyl bromide has a five-carbon chain with a specific arrangement. The structural formula can be represented as:

• Br
• |
• CH3-CH2-C(CH3)2

This structure shows that the bromine atom (Br) is attached to the first carbon of the branched chain.

IUPAC Name

The IUPAC name for neo-pentyl bromide is 2-bromo-2-methylbutane. Here’s how we derive that:

• The longest continuous carbon chain contains four carbons (butane).
• There is a methyl group (CH3) on the second carbon, hence the "2-methyl" part.
• Finally, the presence of the bromine substituent is indicated by "bromo" at the second position.

Methyl Terti-Butyl Ether

Now, let’s move on to methyl tert-butyl ether, which is an ether compound. Ethers are characterized by an oxygen atom connected to two alkyl or aryl groups.

Structural Formula

The structural formula for methyl tert-butyl ether can be illustrated as follows:

• CH3
• |
• CH3-C-O-CH3
• |
• CH3

In this structure, the tert-butyl group (C4H9) is connected to a methyl group (CH3) via an oxygen atom.

IUPAC Name

The IUPAC name for methyl tert-butyl ether is simply methyl 2-methylpropyl ether. Here’s the reasoning:

• The tert-butyl group is recognized as 2-methylpropyl.
• The methyl group is directly attached to the oxygen, making it a methyl ether.

In summary, we have neo-pentyl bromide as 2-bromo-2-methylbutane and methyl tert-butyl ether as methyl 2-methylpropyl ether. Understanding the structure and naming conventions helps in grasping the relationships between molecular structure and nomenclature in organic chemistry.