Journal
INORGANIC CHEMISTRY
Volume 48, Issue 22, Pages 10819-10825Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic901444c
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- Edmond J. Safra Foundation
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Gradient-corrected (BP86) and hybrid (M06-L) density functional calculations were used to study the relative stability of cis and trans-dichloro X-chelated benzylidene ruthenium complexes (X = O, S, Se, N, P). Calculations in the gas phase differed from experimental results, predicting the trans-dichloro configuration as being more stable in every case. The addition of Poisson-Boltzmann (PBF) continuum approximation (dichloromethane) corrected the disagreement and afforded energies consistent with experimental results. Novel N, Se, and P chelated ruthenium olefin metathesis complexes were synthesized to evaluate calculation predictions. These findings reinforce the importance of including solvent corrections in DFT calculations of ruthenium metathesis catalysts and predict that stronger a donors as chelating atoms tend to electronically promote the unusual and less active cis-dichloro configuration.
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