Isomerism of (π-1,3-dimethylallyl)(phosphinooxazoline)Pd complexes: a comparison between experiment and theory

Dedicated to Professor Rolf Gleiter on the occasion of his 65th birthday
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Abstract

Conformational analyses of two (π-1,3-dimethylallyl)(phosphinooxazoline)Pd complexes were carried out using QM/MM computations and a self-consistent reaction field (SCRF) solvation model. The computed isomer ratios and geometries are in good agreement with experimental NMR and X-ray data.

(π-Allyl)Pd complexes of chiral phosphinooxazoline (PHOX) ligands, derived from α-amino acids, are widely used in Pd-catalyzed asymmetric allylic substitutions. Conformational analyses of two (π-1,3-dimethylallyl)(phosphinooxazoline)Pd complexes were carried out using hybrid QM/MM computations and a self-consistent reaction field (SCRF) solvation model. The computed isomer ratios and geometries are in good agreement with experimental NMR and X-ray data.

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Supplementary material

Crystallographic data for the structural analysis have been deposited with the Cambridge Crystallographic Data Centre, CCDC nos. 155381 and 155382 for compounds [(π-1,3-dimethylallyl)(1)Pd]ClO4 and[(π-1,3-dimethylallyl)(2)Pd]ClO4, respectively. Copies of this information may be obtained free of charge from The Director, CCDC, 12 Union Road, Cambridge CB2 1EZ, UK (Fax: +44-1223-336033; e-mail: [email protected] or www: http://www.ccdc.cam.ac.uk).

Acknowledgements

This work was supported by the Deutsche Forschungsgemeinschaft (SFB 247 and DFG-Habilitationsstipendium for B.G.) and the Fonds der Chemischen Industrie.

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