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Not so sure about the second one
Date Posted:
4 years ago
For cis-trans you will need the two different substituents on each C of the C = C bond.
And there will be two identical substituents on opposite Cs
And there will be two identical substituents on opposite Cs
So there is no cis-trans isomerism for the second alkene, since the top one can be flipped vertically to get to the bottom one.