Journal
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
Volume 9, Issue 5, Pages 2286-2299Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ct301112m
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Funding
- NSERC
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The performance of range separated functionals for the calculation of reaction profiles of organometallic compounds is considered. Sets of high-level computational results are used as reference data for the most part The benchmark data include a number of reactions involving small molecules reacting with the Pd atom, PdCl-, PdCl2, and a Ni atom, the reaction of a model Grubbs catalyst, and the ligand binding in a real Grubbs catalyst. Range-separated functionals are found to improve upon most standard local functionals especially if an optimized range-separation parameter is used They do not represent an improvement upon the better-performed global hybrid functionals or a local functional that includes a larger number of adjustable parameters. Some unusual results for molecule-molecule interaction energies are observed and explained by a detailed analysis of the contributions to the bonding energies. The influence of range separation on the barriers and reaction energies is also investigated.
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