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Article Dans Une Revue Dalton Transactions Année : 2021

Bonding analysis in ytterbium(II) distannyl and related tetryls

Résumé

The syntheses of the ytterbium(II) distannyl [Yb{Sn(SiMe)}·(thf)] (Yb-Sn) and of its digermyl analogue [Yb{Ge(SiMe)}·(thf)] (Yb-Ge) are presented. The compounds were characterised by multinuclear high-resolution solution NMR spectroscopy, including Yb NMR, and by X-ray diffraction crystallography. The bonding and electronic properties of the two complexes, along with those of the known ytterbium(II) disilyl derivative [Yb{Si(SiMe)}·(thf)] (Yb-Si) and those of the congeneric calcium distannyl [Ca{Sn(SiMe)}·(thf)] (Ca-Sn), were investigated in detail by DFT calculations. This analysis points at a primarily ionic Yb-tetrel bonding, with a small covalent contribution, attributed principally to the 5d(Yb) participation. This weak covalent character is found to be larger for the distannyl Yb-Sn than for its lighter Si- and Ge-derivatives. The covalent component is also found to be greater in Yb-Sn than in Ca-Sn, due to the availability of the 5d(Yb) orbitals for bonding.

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hal-03369223 , version 1 (12-10-2021)

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Paternité - Pas d'utilisation commerciale

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Peter M Chapple, Julien Cartron, Ghanem Hamdoun, Marie Cordier, Samia Kahlal, et al.. Bonding analysis in ytterbium(II) distannyl and related tetryls. Dalton Transactions, 2021, 50 (40), pp.14273-14284. ⟨10.1039/d1dt02355a⟩. ⟨hal-03369223⟩
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