Artículo
Copper(I), Silver(I), and Gold(I) Ethylene Complexes of Fluorinated and Boron-Methylated Bis- and Tris(pyridyl)borate Chelators
Fecha
2023-01-30Autor
Universidad San Sebastián
Universidad San Sebastián
Universidad San Sebastián
Universidad San Sebastián
Universidad San Sebastián
Watson, Brandon T.
Vanga, Mukundam
Noonikara-Poyil, Anurag
Muñoz-Castro, Alvaro
Dias, H. V.Rasika
Institución
Resumen
Bis- and tris-pyridyl borate ligands containing pyridyl donor arms, a methylated boron cap, and a fluorine-lined coordination pocket have been prepared and utilized in coinage metal chemistry. The tris(pyridyl)borate ligand has been synthesized using a convenient boron source, [NBu4][MeBF3]. These N-based ligands permitted the isolation of group 11 metal-ethylene complexes [MeB(6-(CF3)Py)3]M(C2H4) and [Me2B(6-(CF3)Py)2]M(C2H4) (M = Cu, Ag, Au). The gold complexes display the largest coordination-induced upfield shifts of the ethylene 13C resonance relative to that of the free ethylene in their NMR spectra, while the silver complexes show the smallest shift. Solid-state structures of five of these metal-ethylene complexes as well as the related free ligands were established by X-ray crystallography. Surprisingly, all three [MeB(6-(CF3)Py)3]M(C2H4) adopt the rare κ2 coordination mode rather than the typical κ3 coordination mode of facial capping tridentate ligands. Computational analyses indicate that κ2 coordination mode is favored over the κ3-mode in these coinage metal-ethylene complexes and point to the effects CF3-substituents have on κ2/κ3-energy difference. The M-C and M-N bond distances of [MeB(6-(CF3)Py)3]M(C2H4) follow the trend expected based on covalent radii of M(I) ions. The calculated ethylene-M interaction energy of κ2-[MeB(6-(CF3)Py)3]M(C2H4) indicated that the gold(I) forms the strongest interaction with ethylene. A comparison to the related poly(pyrazolyl)borates is also presented.
Materias
Ítems relacionados
Mostrando ítems relacionados por Título, autor o materia.
-
Guía infográfica de las aves del campus de la Pontificia Universidad Javeriana : Sede central
Echeverry-Galvis, Maria Angela; Cortés Cano, Juan Sebastián; Juan Sebastián, Sergio Andrés; Zapata Montoya, Sebastián; Botiva, Daniel Yesid; Linero, Daniela; Orozco, Daniela; Medina, Juan Sebastián; Sánchez, Juan Sebastián; Zuluaga, Juliana; Gómez, Laura María; Erazo, Paula Andrea; Ortegón, Salomé; Niño, Stephanie; Bocanegra, Valentina; Cardona, Valentina; Rincón, Víctor Julio; Moreno, Johan Sebastian; Jiménez, ValeriaEn las áreas urbanas las aves les dan a los ciudadanos un contacto directo con la vida silvestre. Su presencia es esencial para la polinización de jardines y huertas urbanas, para el control de poblaciones de roedores y ... -
Guía infográfica de las aves del campus de la Pontificia Universidad Javeriana : Sede central
Echeverry-Galvis, Maria Angela; Cortés Cano, Juan Sebastián; Juan Sebastián, Sergio Andrés; Zapata Montoya, Sebastián; Botiva, Daniel Yesid; Linero, Daniela; Orozco, Daniela; Medina, Juan Sebastián; Sánchez, Juan Sebastián; Zuluaga, Juliana; Gómez, Laura María; Erazo, Paula Andrea; Ortegón, Salomé; Niño, Stephanie; Bocanegra, Valentina; Cardona, Valentina; Rincón, Víctor Julio; Moreno, Johan Sebastian; Jiménez, ValeriaEn las áreas urbanas las aves les dan a los ciudadanos un contacto directo con la vida silvestre. Su presencia es esencial para la polinización de jardines y huertas urbanas, para el control de poblaciones de roedores y ... -
Niveles de empatía en estudiantes de Odontología de la Universidad San Sebastián, Concepción, Chile
Universidad San Sebastián; Universidad San Sebastián; Universidad San Sebastián; Torres-Martínez, Pilar Alejandra; Barrios-Penna, Carolina Alejandra; Fonseca-Molina, Juan Fernando; Díaz-Narváez, Víctor Patricio; González-Cruz, Sebastián Alejandro (2017)Introduction: The training of future dentists should consider developing empathy while they are still students. The first step to consider such training is to assess empathic behavior. Objective: To measure levels of empathy ...