title: Alkaline Earth-Olefin Complexes with Secondary Interactions.
abstract: Strontium and calcium (alkaline earth: Ae) olefin complexes stabilised by secondary Ae⋅⋅⋅F-C and β-agostic Ae⋅⋅⋅H-Si interactions are presented. Olefin coordination onto the alkaline earths is plain in the solid state, and it is thermodynamically favoured over the coordination of THF. The existence of the Ae⋅⋅⋅olefin interactions is corroborated by solution NMR data and DFT computations. The coordination mode of the olefin varies with steric effects and, if enforced, olefin dissociation can be compensated by the other non-covalent interactions, as supported by DFT computations.
authors.affiliation: Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 263 avenue du Général Leclerc, 35042, Rennes Cedex, France.
authors.forename: Sorin-Claudiu
authors.initials: SC
authors.lastname: Roşca
authors.affiliation: CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, 31077, Toulouse Cedex 4, France.|Université de Toulouse, UPS, INPT, LCC, 31077, Toulouse Cedex 4, France.
authors.forename: Chiara
authors.initials: C
authors.lastname: Dinoi
authors.affiliation: Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 263 avenue du Général Leclerc, 35042, Rennes Cedex, France.
authors.forename: Elsa
authors.initials: E
authors.lastname: Caytan
authors.affiliation: Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 263 avenue du Général Leclerc, 35042, Rennes Cedex, France.
authors.forename: Vincent
authors.initials: V
authors.lastname: Dorcet
authors.affiliation: CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, 31077, Toulouse Cedex 4, France.|Université de Toulouse, UPS, INPT, LCC, 31077, Toulouse Cedex 4, France.
authors.forename: Michel
authors.initials: M
authors.lastname: Etienne
authors.affiliation: Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 263 avenue du Général Leclerc, 35042, Rennes Cedex, France. jean-francois.carpentier@univ-rennes1.fr.
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Carpentier
authors.affiliation: Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 263 avenue du Général Leclerc, 35042, Rennes Cedex, France. yann.sarazin@univ-rennes1.fr.
authors.forename: Yann
authors.identifier: http://orcid.org/0000-0003-1121-0292
authors.initials: Y
authors.lastname: Sarazin
keywords: alkaline earths; calcium; coordinated olefin; secondary interactions; strontium