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3‐Aryl‐5‐(2‐pyridyl)pyrazoles and related compounds are easily accessible via the reaction of the appropriate 1,3‐diketone with hydrazine hydrate. The central pyrazole rings show a far‐reaching equalization of the bond lengths. In the crystalline state dimeric and strand‐like structures are observed due to the formation of intermolecular N–H···N hydrogen bridges between the pyrazole N–H functionality...
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