Computed ligand electronic parameters from quantum chemistry and their relation to Tolman parameters, Lever
L Perrin1, E Clot, O Eisenstein
1Laboratoire de Structure et Dynamique des Systèmes Moléculaires et Solides, UMR 5636 (CNRS), Université de Montpellier 2, 34095 Montpellier Cedex 5, France.
Abstract:
The calculated (DFT, B3PW91) A(1) nu(CO) frequency in LNi(CO)(3) defines an electronic parameter that reliably predicts the relative donor powers of a wide variety of cationic, neutral, and negatively charged ligands. These calculated parameters correlate very well with the available Tolman and Lever parameters, and also with Hammett's sigma(m), where available. The method avoids any experimental limitations and, in particular, can be used for proposed ligands not yet experimentally available.
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