Name the following organic compounds: a) CH3CH(CH3)CH2CH2CH3

Here are the names for the given organic compounds:

a) CH₃CH(CH₃)CH₂CH₂CH₃

Step 1: Identify the longest continuous carbon chain.
The longest chain has 5 carbons (pentane).

$$\text{CH}_3-\text{CH}(\text{CH}_3)-\text{CH}_2-\text{CH}_2-\text{CH}_3$$

Step 2: Number the chain to give the substituent the lowest possible number.
Numbering from the left gives the methyl group at position 2. Numbering from the right gives it at position 4. So, we number from the left.

$$$$