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Título

Differences in first neighbor orientation behind the anomalies in the low and high density trans-1,2-dichloroethene liquid

AutorRovira-Esteva, M.; Murugan, N.A.; Pardo, L. C.; Busch, S.; Tamarit, J. L.; Cuello, G. J.; Bermejo, Francisco Javier CSIC ORCID
Fecha de publicación30-mar-2012
EditorAmerican Institute of Physics
CitaciónJournal of Chemical Physics 136: 124514 (2012)
ResumenTrans-1,2-dichloroethene (HClC=CClH) has several structural and dynamic anomalies between its low- and high-density liquid, previously found through neutron scattering experiments. To explain the microscopic origin of the differences found in those experiments, a series of molecular dynamics simulations were performed. The analysis of molecular short-range order shows that the number of molecules in the first neighbor shell is 12 for the high-density liquid and 11 for the low-density one. It also shows that the angular position of the center of mass of the first neighbor is roughly the same although the molecular orientation is not. In both liquids the first neighbor and its reference molecule arrange mainly in two configurations, each being the most probable in one of the liquids. First neighbors in the configuration that predominates in the high-density liquid tend to locate themselves closer to the reference molecule, an evidence that they are more strongly bonded. This arrangement facilitates a better packing of the rest of molecules in the first neighbor shell so that on average an additional molecule can be included, and is proposed to be the key in the explanation of all the observed anomalies in the characteristics of both liquids. © 2012 American Institute of Physics.
Descripción7 pags., 10 figs., 2 tabs.
Versión del editorhttp://dx.doi.org/10.1063/1.3697849
URIhttp://hdl.handle.net/10261/216184
DOI10.1063/1.3697849
Identificadoresdoi: 10.1063/1.3697849
issn: 0021-9606
Aparece en las colecciones: (CFMAC-IEM) Artículos




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