Question

(10pts) draw all isomers of c₆h₁₄ using the line-angle formula. there are five. upload an image of your drawings with their iupac names here.

Answer:

To solve the problem of drawing all isomers of \( \ce{C6H14} \) (hexane) using the line - angle formula and providing their IUPAC names, we follow these steps:

Step 1: Recall the general formula for alkanes

The general formula for alkanes is \( \ce{C_nH_{2n + 2}} \). For \( n=6 \), the formula \( \ce{C6H14} \) represents hexane, and we are looking for its structural isomers. Structural isomers have the same molecular formula but different arrangements of carbon atoms.

Step 2: Identify the isomers of \( \ce{C6H14} \)

1. n - hexane (hexane):

• In the line - angle formula, we represent it as a straight chain of 6 carbon atoms. The carbon atoms are connected in a linear sequence, and each carbon atom (except the ones at the ends) is bonded to two other carbon atoms and two hydrogen atoms, while the end carbon atoms are bonded to three hydrogen atoms.
• IUPAC name: Hexane. The line - angle formula is a straight line of 6 vertices (representing carbon atoms) with appropriate hydrogen atoms implied (in line - angle formulas, hydrogen atoms attached to carbon atoms are not shown explicitly; each carbon atom is assumed to have enough hydrogen atoms to satisfy the tetravalency of carbon, i.e., 4 bonds per carbon atom).

1. 2 - methylpentane:

• We start with a 5 - carbon chain (pentane as the parent chain). Then we attach a methyl (\( \ce{-CH3} \)) group to the second carbon atom of the pentane chain.
• In line - angle formula, we draw a 5 - carbon chain. The second carbon atom (counting from the left or right, but we follow the IUPAC numbering rules to give the substituent the lowest possible number) has a branch (the methyl group).
• IUPAC name: 2 - methylpentane.

1. 3 - methylpentane:

• The parent chain is a 5 - carbon chain (pentane). A methyl group is attached to the third carbon atom of the pentane chain.
• In the line - angle formula, we draw a 5 - carbon chain, and the third carbon atom has a methyl branch.
• IUPAC name: 3 - methylpentane.

1. 2,2 - dimethylbutane:

• The parent chain is a 4 - carbon chain (butane). We attach two methyl groups to the second carbon atom of the butane chain.
• In the line - angle formula, we draw a 4 - carbon chain. The second carbon atom has two methyl branches.
• IUPAC name: 2,2 - dimethylbutane.

1. 2,3 - dimethylbutane:

• The parent chain is a 4 - carbon chain (butane). We attach one methyl group to the second carbon atom and one methyl group to the third carbon atom of the butane chain.
• In the line - angle formula, we draw a 4 - carbon chain. The second and third carbon atoms each have a methyl branch.
• IUPAC name: 2,3 - dimethylbutane.

To present the isomers:

Isomer	Line - Angle Formula Description	IUPAC Name
2	5 - C chain with \( \ce{-CH3} \) on C - 2	2 - methylpentane
3	5 - C chain with \( \ce{-CH3} \) on C - 3	3 - methylpentane
4	4 - C chain with two \( \ce{-CH3} \) on C - 2	2,2 - dimethylbutane
5	4 - C chain with \( \ce{-CH3} \) on C - 2 and C - 3	2,3 - dimethylbutane

You can draw these structures on a paper (or using a chemical drawing software) and then upload the image along with the IUPAC names as required.

If you are using a software like ChemDraw or an online tool like MolView, you can create the line - angle structures as follows:

• For hexane: Draw a straight line of 6 carbon atoms (each carbon is a vertex, and the bonds between them are the edges of the line).
• For 2 - methylpentane: Draw a 5 - carbon chain. Select the second carbon atom (from the left) and add a single - bonded \( \ce{-CH3} \) group.
• For 3 - methylpentane: Draw a 5 - carbon chain. Select the third carbon atom and add a single - bonded \( \ce{-CH3} \) group.
• For 2,2 - dimethylbutane: Draw a 4 - carbon chain. Select the second carbon atom and add two single - bonded \( \ce{-CH3} \) groups.
• For 2,3 - dimethylbutane: Draw a 4 - carbon chain. Select the second and third carbon atoms and add one single - bonded \( \ce{-CH3} \) group to each.

After drawing, label each structure with its respective IUPAC name and then upload the image as per the instructions.