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The Polarizability of Organometallic bonds

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Publication date 2015
Project Properties of metal-organic materials from accurate electron density determination
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Original article (peer-reviewed)

Journal Comput. Theo. Chem.
Volume (Issue) 1053
Page(s) 165 - 172
Title of proceedings Comput. Theo. Chem.
DOI 10.1016/j.comptc.2014.09.032

Open Access

URL http://boris.unibe.ch/id/eprint/73111
Type of Open Access Repository (Green Open Access)

Abstract

The distributed atomic polarizabilities enable the investigation of the coordination of organic ligands to transition metals giving new insight of some organometallic complexes used in catalytic processes. This approach is useful to appreciate the enormous changes occurring upon complexation to a metal, which is mainly responsible for the augmented reactivity of these species. The method we have developed allows calculating the polarizability of an atom in a molecule upon a partitioning of the electron density, for example using the Quantum Theory of Atoms in Molecules. The polarizabilities result from numerical differentiation of the atomic dipole moments with respect to the electric field. From the polarizability tensors, other useful quantities derive, for example a mathematically precise definition of bond polarizability. In terms of chemical reactivity, the distributed polarizabilities are complementary to the traditional analysis of the electrostatic potential, which informs only on susceptibility toward hard, charge-controlled chemical reactions. On the contrary, atomic polarizabilities enable addressing the sites more keen on soft, orbital-controlled reactions.
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