Bonding analysis in ytterbium(ii) distannyl and related tetryls
Dalton Transactions, ISSN: 1477-9234, Vol: 50, Issue: 40, Page: 14273-14284
2021
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Article Description
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, includingYb 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 distannylYb-Snthan for its lighter Si- and Ge-derivatives. The covalent component is also found to be greater inYb-Snthan inCa-Sn, due to the availability of the 5d(Yb) orbitals for bonding.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85117524879&origin=inward; http://dx.doi.org/10.1039/d1dt02355a; http://www.ncbi.nlm.nih.gov/pubmed/34553734; https://xlink.rsc.org/?DOI=D1DT02355A; https://dx.doi.org/10.1039/d1dt02355a; https://pubs.rsc.org/en/content/articlelanding/2021/dt/d1dt02355a
Royal Society of Chemistry (RSC)
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