Structure and bonding in WC<inf>n</inf>(n = 2–5) clusters

Elizabeth Flórez, Gabriel Merino, José Luis Cabellos, Franklin Ferraro, Albeiro Restrepo, C. Z. Hadad

Resultado de la investigación: Contribución a una revistaArtículo

1 Cita (Scopus)

Resumen

© 2016, Springer-Verlag Berlin Heidelberg. Stochastic explorations of the configurational spaces for WCn(n = 2–5) clusters lead to densely populated spin states at each molecularity. We found 8, 16, 42, and 68 well-defined minima for n = 2, 3, 4, 5, respectively, in spin states ranging from singlets to quintuplets. The lowest energy isomers are triplets in all cases, except for n = 2 where there is competition between a quintuplet and a triplet state for the global minimum. The transition from planar to 3D structural preferences occurs between n = 4 and n = 5. For the global minima, the structures may be considered as the result of the interaction between two fragments: a tungsten cation and a covalently bonded anionic carbon chain. We found that spin–orbit (SO) effects reduce energy differences among isomers. Likewise, SO effects diminish as a function of the carbon content in the clusters to the point that for n = 5 they become negligible.
Idioma originalInglés estadounidense
PublicaciónTheoretical Chemistry Accounts
DOI
EstadoPublicada - 1 sep 2016

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