In the context of alkenes, the terms "cis" and "trans" refer to the relative positioning of substituents around the double bond. For pent-2-ene, the double bond is located between the second and third carbon atoms.

### Identification of Cis and Trans Isomers

1. **Cis Isomer**: The substituents (in this case, the alkyl groups) attached to the double bond are on the same side.
2. **Trans Isomer**: The substituents are on opposite sides of the double bond.

To identify which structure is the cis isomer of pent-2-ene:

- You need to look for the arrangement of groups attached to the double-bonded carbons (C2 and C3).
- The structure that has the two methyl (–CH₃) groups on the same side of the double bond is the **cis isomer**.

### Summary

In the case of pent-2-ene, the structure where the two methyl groups are positioned on the same side of the double bond is the **cis isomer**. The other structure, where they are on opposite sides, is the **trans isomer**.

Question

In the context of alkenes, the terms "cis" and "trans" refer to the relative positioning of substituents around the double bond. For pent-2-ene, the double bond is located between the second and third carbon atoms.

### Identification of Cis and Trans Isomers

1. **Cis Isomer**: The substituents (in this case, the alkyl groups) attached to the double bond are on the same side.
2. **Trans Isomer**: The substituents are on opposite sides of the double bond.

To identify which structure is the cis isomer of pent-2-ene:

- You need to look for the arrangement of groups attached to the double-bonded carbons (C2 and C3).
- The structure that has the two methyl (–CH₃) groups on the same side of the double bond is the **cis isomer**.

### Summary

In the case of pent-2-ene, the structure where the two methyl groups are positioned on the same side of the double bond is the **cis isomer**. The other structure, where they are on opposite sides, is the **trans isomer**.

Knowee AI · Accepted Answer

In the context of alkenes, the terms "cis" and "trans" refer to the relative positioning of substituents around the double bond. For pent-2-ene, the double bond is located between the second and third carbon atoms.

### Identification of Cis and Trans Isomers

1. **Cis Isomer**: The substituents (in this case, the alkyl groups) attached to the double bond are on the same side.
2. **Trans Isomer**: The substituents are on opposite sides of the double bond.

To identify which structure is the cis isomer of pent-2-ene:

- You need to look for the arrangement of groups attached to the double-bonded carbons (C2 and C3).
- The structure that has the two methyl (–CH₃) groups on the same side of the double bond is the **cis isomer**.

### Summary

In the case of pent-2-ene, the structure where the two methyl groups are positioned on the same side of the double bond is the **cis isomer**. The other structure, where they are on opposite sides, is the **trans isomer**.

The following structures are two cis/trans of pent-2-ene. Which is the cis isomer?

Question

The following structures are two cis/trans of pent-2-ene. Which is the cis isomer?

Solution

Identification of Cis and Trans Isomers

Summary

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