A1 Journal article (refereed)
Uranium(iv) cyclobutadienyl sandwich compounds : synthesis, structure and chemical bonding (2020)

Tsoureas, N., Mansikkamäki, A., & Layfield, R. A. (2020). Uranium(iv) cyclobutadienyl sandwich compounds : synthesis, structure and chemical bonding. Chemical Communications, 56(6), 944-947. https://doi.org/10.1039/C9CC09018E

JYU authors or editors

Publication details

All authors or editors: Tsoureas, Nikolaos; Mansikkamäki, Akseli; Layfield, Richard A.

Journal or series: Chemical Communications

ISSN: 1359-7345

eISSN: 1364-548X

Publication year: 2020

Volume: 56

Issue number: 6

Pages range: 944-947

Publisher: Royal Society of Chemistry

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1039/C9CC09018E

Publication open access: Not open

Publication channel open access: 

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/74489

Abstract

The 1 : 1 reactions of uranium(IV) tetrakis(borohydride) with the sodium and potassium salts of the cyclobutadienyl anion [C4(SiMe3)4]2− (Cb′′′′) produce the half-sandwich complexes [Na(12-crown-4)2][U(η4-Cb′′′′)(BH4)3] and [U(η4-Cb′′′′)(μ-BH4)3{K(THF)2}]2. In the 1 : 2 reaction of U(BH4)4 with Na2Cb′′′′, formation of [U(η4-Cb′′′′)(η3-C4H(SiMe3)3-κ-(CH2SiMe2)(BH4))]− reveals that a Cb′′′′ ligand undergoes an intramolecular deprotonation, resulting in an allyl/tuck-in bonding mode. A computational study reveals that the uranium–Cb′′′′ bonding has an appreciable covalent component with contributions from the uranium 5f and 6d orbitals.

Keywords: coordination complexes; uranium; chemical synthesis; chemical bonds

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 2