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I am learning about conjugated unsaturated systems, and came upon s-cis and s-trans conformations in conjugated dienes.

So what does the "s" mean in s-cis and s-trans conformations?

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The s stands for single, as in single bond. It means the double bonds are cis or trans to each other based around the single bond. enter image description here

It is a common enough expression to search for, if more information is required.

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