4,4'-Bipyridine

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What Wikipedia says

4,4′-Bipyridine (abbreviated to 4,4′-bipy or 4,4′-bpy) is an organic compound with the formula (C5H4N)2. It is one of several isomers of bipyridine. It is a colorless solid that is soluble in organic solvents. is mainly used as a precursor to N,N′-dimethyl-4,4′-bipyridinium [(C5H4NCH3)2]2+, known as paraquat.

Excerpt from the Wikipedia article “4,4'-Bipyridine”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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