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

journal contribution
posted on 2023-06-10, 01:34 authored by Nikolaos Tsoureas, Akseli Mansikkamäki, Richard LayfieldRichard Layfield
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(?4-Cb'''')(BH4)3] and [U(?4-Cb'''')(µ-BH4)3{K(THF)2}]2. In the 1:2 reaction of U(BH4)4 with Na2Cb'''', formation of [U(?4-Cb'''')(?3-C4H(SiMe3)3-?-(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.

History

Publication status

  • Published

File Version

  • Published version

Journal

Chemical Communications

ISSN

1359-7345

Publisher

Royal Society of Chemistry

Issue

6

Volume

56

Page range

944-947

Event location

England

Department affiliated with

  • Chemistry Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2021-11-01

First Compliant Deposit (FCD) Date

2021-10-30

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