Using the Source Function descriptor to dampen the multipole model bias in charge density studies from X-ray structure factors refinements
Articolo
Data di Pubblicazione:
2009
Citazione:
Using the Source Function descriptor to dampen the multipole model bias
in charge density studies from X-ray structure factors refinements / L. Lo Presti, C. Gatti. - In: CHEMICAL PHYSICS LETTERS. - ISSN 0009-2614. - 476:4/6(2009), pp. 308-316. [10.1016/j.cplett.2009.06.022]
Abstract:
The Source Function (SF) atomic contributions were evaluated at bond critical points (bcps) for three test
systems, using theoretical electron densities and multipole modelled densities derived from the former projected into structure factors. In general, the SF percentage atomic contributions obtained from the multipole modelled density agree well with those calculated from the corresponding primary density, despite large discrepancies in the electron density and, particularly, in the density Laplacian values occur at bcps. The SF percentage contributions represent a more robust chemical bond descriptor than are other
commonly used bond topological indices which are too sensitive to the multipole model bias.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
electron density ; source function ; quantum theory of atoms in molecules
Elenco autori:
L. Lo Presti, C. Gatti
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