Bennett, Troy L. R.; Wilkinson, Luke A.; Lok, Jasmine M. A.; O’Toole, Robert C. P.; Long, Nicholas J. published their research in Organometallics in 2021. The article was titled 《Synthesis, Electrochemistry, and Optical Properties of Highly Conjugated Alkynyl-Ferrocenes and -Biferrocenes》.Category: pyridine-derivatives The article contains the following contents:
Sonogashira reactions are utilized herein to react iodo-ferrocenes and -biferrocenes with terminal alkyne ligands, functionalized with both pyridine and thioanisole groups. High-yielding reactions generate both monoalkynyl and dialkynyl derivatives, the ratio of which can be altered through changes in the reaction stoichiometry. This methodol. allowed us to synthesize a large family of derivatives, comprising four sym. derivatives (3xx, where x represents a phenyl-substituted terminal alkyne) and six less-studied asym. derivatives (3xy, where x and y represent two different phenyl-substituted terminal alkynes), as well as a number of their biferrocenyl analogs (6x, 7xx, and 7xy), including the first known examples of asym. disubstituted biferrocenes. Authors examined the electrochem. behavior of all the systems in solution through the use of cyclic voltammetry and demonstrate that these highly conjugated alkynyl ligands exert delicate redox control over the central ferrocene motif. They also note that these substituents display some control over the mixed-valence character present in biferrocene monocations, with thioanisole substituents imparting almost an order of magnitude higher Kc than their pyridyl analogs, and asym. systems displaying rare characteristic properties of mixed-valence isomers. The electronic structure of these systems was further elucidated through a combination of UV/vis spectroscopy and d. functional theory calculations Their methodol. provides a facile and adaptable route toward the isolation of a number of novel ferrocene and biferrocene derivatives From their perspective, the asym. nature of these systems, along with the delicate and predictable redox control that these ligands exert on the central ferrocene unit(s), could lead to applications in mol. electronics, where these properties have previously shown promise in the fabrication of diodes and rectifiers, as well as in the synthesis of donor-π-acceptor systems. The experimental process involved the reaction of 4-Ethynylpyridine(cas: 2510-22-7Category: pyridine-derivatives)
4-Ethynylpyridine(cas: 2510-22-7) belongs to pyridine. Pyridines are often used as catalysts or reagents; particular notice has been paid recently to how pyridine coordinates to metal centers enabling a wide range of valuable reactions. Category: pyridine-derivatives