Identify all the 1 (deg), ( 2 deg)., 3 (deg.) and 4 (deg.). carbon in 2,2-dimethylpentane.

To identify the different degrees of carbon in 2,2-dimethylpentane, we first need to understand what is meant by primary (1°), secondary (2°), tertiary (3°), and quaternary (4°) carbons. These terms refer to the number of other carbon atoms that are directly bonded to a given carbon atom. Let's break this down step by step.

Understanding Carbon Degrees

In organic chemistry, the classification of carbon atoms is based on their connectivity:

• Primary (1°) Carbon: A carbon atom bonded to only one other carbon.
• Secondary (2°) Carbon: A carbon atom bonded to two other carbons.
• Tertiary (3°) Carbon: A carbon atom bonded to three other carbons.
• Quaternary (4°) Carbon: A carbon atom bonded to four other carbons.

Structure of 2,2-Dimethylpentane

2,2-Dimethylpentane has a specific structure that we can visualize. The main chain is a five-carbon pentane, and there are two methyl groups attached to the second carbon of this chain. The structure can be represented as follows:

       CH3
        |
    CH3-C-CH2-CH2-CH3
        |
       CH3

Identifying the Carbon Atoms

Now, let’s analyze the carbon atoms in this structure:

• The **first carbon** (C1) is at the end of the chain and is bonded to one other carbon (C2). This is a 1° carbon.
• The **second carbon** (C2) is bonded to three other carbons (C1, C3, and two methyl groups). This is a 3° carbon.
• The **third carbon** (C3) is bonded to two other carbons (C2 and C4). This is a 2° carbon.
• The **fourth carbon** (C4) is also bonded to two other carbons (C3 and C5). This is another 2° carbon.
• The **fifth carbon** (C5) is at the end of the chain and is bonded to one other carbon (C4). This is a 1° carbon.
• The **methyl groups** (C6 and C7) attached to C2 are both 1° carbons since each is bonded to only one carbon (C2).

Summary of Carbon Degrees

Now that we have identified the carbons, here’s the summary:

• 1° Carbons: C1, C5, C6, C7 (four total)
• 2° Carbons: C3, C4 (two total)
• 3° Carbons: C2 (one total)
• 4° Carbons: None

In total, 2,2-dimethylpentane contains four primary carbons, two secondary carbons, and one tertiary carbon, with no quaternary carbons present. This classification helps in understanding the reactivity and properties of the molecule in various chemical reactions.