Geometric isomers occur in some alkenes. These isomers are called cis-trans isomers because of the spatial orientation of the atoms or groups of atoms attached to the two carbons that form the double bond. Select all the pairs that are cis-trans isomers. H₂C-CH₂ H H H,CCH3 and H CH3 H₂C H CH3 Incorrect H3C CH3 CH-CH and H and CH-CH H H H3C H H₂C-CH₂ H H H and "X-X H H H3C-CH₂ H H H,C—CH3 H H H₂C H H₂CH₂C-CH₂ Feedback X At least one of your choices is incorrect. Alkene stereoisomers are often referred to as either cis or trans isomers. This terminology is typically used for disubstituted alkenes. The cis form of the molecule has the substituents on the same side of the double bond. The trans form has the substituents on opposite sides of the double bond. cis trans Remember that isomers must have the same molecular formula and have a double bond to lock the two forms.

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Geometric isomers occur in some alkenes. These isomers are called cis-trans isomers because of the spatial orientation of the
atoms or groups of atoms attached to the two carbons that form the double bond.
Select all the pairs that are cis-trans isomers.
H3C-CH₂
H
H
H,C—CH3
and
H
CH3
H3C
H
H
CH3
?
>
Incorrect
H3C
CH3
CH-CH
and
CH-CH
H
H
H3C
H
H3C-CH₂
H
H
H
"X-X
and
H
H
H3C-CH₂
H
H
H,C—CH3
H
H
X
H₂C
H
H₂C
H,C…CH3
and
<
Feedback
X
At least one of your choices is
incorrect.
Alkene stereoisomers are often referred
to as either cis or trans isomers. This
terminology is typically used for
disubstituted alkenes.
The cis form of the molecule has the
substituents on the same side of the
double bond. The trans form has the
substituents on opposite sides of the
double bond.
H
cis
trans
Remember that isomers must have the
same molecular formula and have a
double bond to lock the two forms.
Transcribed Image Text:Geometric isomers occur in some alkenes. These isomers are called cis-trans isomers because of the spatial orientation of the atoms or groups of atoms attached to the two carbons that form the double bond. Select all the pairs that are cis-trans isomers. H3C-CH₂ H H H,C—CH3 and H CH3 H3C H H CH3 ? > Incorrect H3C CH3 CH-CH and CH-CH H H H3C H H3C-CH₂ H H H "X-X and H H H3C-CH₂ H H H,C—CH3 H H X H₂C H H₂C H,C…CH3 and < Feedback X At least one of your choices is incorrect. Alkene stereoisomers are often referred to as either cis or trans isomers. This terminology is typically used for disubstituted alkenes. The cis form of the molecule has the substituents on the same side of the double bond. The trans form has the substituents on opposite sides of the double bond. H cis trans Remember that isomers must have the same molecular formula and have a double bond to lock the two forms.
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