Examinando por Materia "Potential energy surface studies on Sn/Ge/Bi compounds"
Mostrando1 - 1 de 1
Resultados por página
Opciones de clasificación
- PublicaciónSólo datosExploring the Potential Energy Surface of Trimetallic Deltahedral Zintl Ions: Lowest-Energy [Sn6Ge2Bi]3– and [(Sn6Ge2Bi)2]4– Structures(Inorganic Chemistry, 2019-07-09) Báez-Grez, Rodrigo; Garza, Jorge; Vásquez-Espinal, Alejandro; Osorio, Edison; Rabanal-León, Walter A.; Yañez, Osvaldo; Tiznado, WilliamThe synthesis and structural characterization of the dimer [(Sn6Ge2Bi)2]4– raise the possibility of obtaining a broad variety of analogous compounds with different Sn/Ge/Bi proportions. Several combinations of nine atoms have been detected by electrospray mass spectrometry as potential assembly units. However, [(Sn6Ge2Bi)2]4– remains as the unique experimentally characterized species in this series. This fact has motivated us to explore its potential energy surface, as well as its monomers’ [Sn6Ge2Bi]3–/2–, in an effort to gain insight into the factors that might be privileging the experimental viability of this species. Our results show that the lowest-energy [Sn6Ge2Bi]3– structure remains in its oxidized product [Sn6Ge2Bi]2–, which corresponds to that identified in the dimer [(Sn6Ge2Bi)2]4–. Additionally, local minima, very close in energy to the lowest-energy monomer, are chiral mixtures that dimerize into diverse structures with a probable energetic cost, making them noncompetitive isomers. Finally, the global minimum of the dimer [(Sn6Ge2Bi)2]4– presents the most stable monomers as assembly units. These results show the importance of considering the simultaneity of all of these conditions for the viability of these types of compounds.