Uranium(iv) cyclobutadienyl sandwich compounds: synthesis, structure and chemical bonding

Tsoureas, Nikolaos, Mansikkamäki, Akseli and Layfield, Richard A (2020) Uranium(iv) cyclobutadienyl sandwich compounds: synthesis, structure and chemical bonding. Chemical Communications, 56 (6). pp. 944-947. ISSN 1359-7345

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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.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
SWORD Depositor: Mx Elements Account
Depositing User: Mx Elements Account
Date Deposited: 01 Nov 2021 08:30
Last Modified: 15 Dec 2021 09:24
URI: http://sro.sussex.ac.uk/id/eprint/102576

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