Write the cis and trans isomers of
1.) 2-pentene
2.) 3-hexene
Please help me idk how. I just know that cis.. Are where atoms are on the same side. While trans on the opposite side
We can't draw diagrams on this forum; I suggest you Google these four substances and you can get pictures/structural formulas there. If you have access to a model kit you can makes these out of ball and stick pieces and sometimes that helps you see the three dimensional forms.
To determine the cis and trans isomers of a molecule, you need to examine the arrangement of substituents around the double bond. Here's how you can identify the cis and trans isomers for 2-pentene and 3-hexene:
1. 2-pentene:
- Start by drawing the structure of pentene, which contains a five-carbon chain with a double bond between carbon atoms 2 and 3.
- To determine the cis isomer, imagine the two substituents on each carbon of the double bond being on the same side.
- In this case, the substituents on carbon atom 2 and carbon atom 3 are both hydrogens. If they were on the same side, it would be the cis isomer. The structure would look like this: CH3CH=CHCH2CH3 (cis-2-pentene).
- To determine the trans isomer, imagine the two substituents on each carbon of the double bond being on opposite sides.
- In this case, the substituents on carbon atom 2 and carbon atom 3 are both hydrogens. If they were on opposite sides, it would be the trans isomer. The structure would look like this: CH3CH=CHCH2CH3 (trans-2-pentene).
2. 3-hexene:
- Start by drawing the structure of hexene, which contains a six-carbon chain with a double bond between carbon atoms 3 and 4.
- To determine the cis isomer, imagine the two substituents on each carbon of the double bond being on the same side.
- In this case, the substituents on carbon atom 3 and carbon atom 4 are both hydrogens. If they were on the same side, it would be the cis isomer. The structure would look like this: CH3CH2CH=CHCH2CH3 (cis-3-hexene).
- To determine the trans isomer, imagine the two substituents on each carbon of the double bond being on opposite sides.
- In this case, the substituents on carbon atom 3 and carbon atom 4 are both hydrogens. If they were on opposite sides, it would be the trans isomer. The structure would look like this: CH3CH2CH=CHCH2CH3 (trans-3-hexene).
Remember, when drawing the structural formula, the atoms involved in the double bond should be connected by a double line (e.g., =CH-). You can also use cis- and trans- prefixes to denote the isomerism.