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Updated: Aug 29, 2025

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Modulation of Metal Carbonyl Stretching Frequencies in the Second Coordination Sphere through the Internal Stark
Gemma L Parker1, Ruben Van Lommel2,3, Nil Roig1,2
1Department of Chemistry, University of Warwick, Gibbet Hill Road, CV4 7AL, Coventry, UK.
Abstract:
Spectroscopic and computational examination of a homologous series of rhodium(I) pybox carbonyl complexes has revealed a correlation between the conformation of the flanking aryl-substituted oxazoline donors and the carbonyl stretching frequency. This relationship is also observed experimentally for octahedral rhodium(III) and ruthenium(II) variants and cannot be explained through the classical, Dewar-Chatt-Duncanson, interpretation of metal-carbonyl bonding. Instead, these findings are reconciled by local changes in the magnitude of the electric field that is projected along the metal-carbonyl vector: the internal Stark effect.
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