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Give the name and structure of the lowes...

Give the name and structure of the lowest molecular mass cumulative polyene that shows only geometrical isomeris `(` diastereomers `)` and not optical isomers.

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To solve the problem, we need to identify the lowest molecular mass cumulative polyene that exhibits geometrical isomerism (as diastereomers) but does not show optical isomerism. Let's break this down step by step. ### Step 1: Understand Cumulative Polyenes Cumulative polyenes are compounds that contain consecutive double bonds. They can have an odd or even number of double bonds. **Hint:** Remember that cumulative polyenes have double bonds in a continuous sequence. ### Step 2: Identify the Type of Isomerism ...
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