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- W2143394920 abstract "Abstract The charge density and its Laplacian at the LiC and CH bond critical points and other features of the electron density distribution of the methyl lithium crystal have been compared by density functional methods for (i) the isolated (LiCH 3 ) 4 tetramer or larger clusters, (ii) for quantum mechanically treated clusters in polarizable continuum model (PCM) surroundings, (iii) for clusters augmented by the periodic electrostatic embedded cluster model (PEECM), and for (iv) the periodic crystal. Comparisons with identical functional and basis sets indicate that both PCM and PEECM embedding of only a tetramer did not fully account for the environmental effect. In contrast, embedding of a full unit cell gave results that were essentially converged to the periodic crystal data. Effects of basis set and exchange correlation functional on the QTAIM bond descriptors are of a comparable order of magnitude as the crystal environmental effects. In this context, embedded cluster computations provide distinct advantages over explicit solid‐state calculations with respect to their freedom of the choice of computational and theoretical level. This is demonstrated by embedded MP2 calculations. © 2010 Wiley Periodicals, Inc. J Comput Chem, 2010" @default.
- W2143394920 created "2016-06-24" @default.
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- W2143394920 date "2010-08-19" @default.
- W2143394920 modified "2023-10-18" @default.
- W2143394920 title "Modeling environmental effects on charge density distributions in polar organometallics: Validation of embedded cluster models for the methyl lithium crystal" @default.
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- W2143394920 doi "https://doi.org/10.1002/jcc.21548" @default.
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