Considerable efforts are being made to find cheaper and more efficient alternatives to the currently commercially available catalysts based on precious metals for the Hydrogen Evolution Reaction (HER). In this...
Hydrazone‐based systems have been, and continue to be, widely studied in the field of supramolecular chemistry due to the chemical versatility of their triatomic C=N‐N structure, whose amino nitrogen commonly bears a methyl group or a hydrogen atom. Herein we review the conformational, configurational, and constitutional dynamics of these systems, focusing on the particularly important role of the N−H group of the hydrazone framework in each of those processes observed in molecular and supramolecular systems published in recent decades. Due to the enormous diversity of supramolecular architectures and molecular entities, the most representative synthetic methodologies to obtain them are described.
The Cover Feature highlights the Latin American culture with an emblem that is the accordion and how the versatility of the amino group resembles the musical notes that appropriately combined exhibit multiple dynamics in the hydrazones. Each highlighted hydrazone‐based system represents one type of dynamism: conformational (orange), configurational (blue), and constitutional (green). The harmonic box contains the words “amino group” to remark the particularly important role of the N–H group in each of those processes observed in hydrazone‐based molecular and supramolecular systems. The authors thank Alejandro Ijaji for the extraordinary design of the cover, following the concept given by the authors. More information can be found in the Review by M. N. Chaur et al.
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