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- W4367158769 abstract "Bonds between actinide elements are extremely rare, with barely a handful identified in fleeting or exotic circumstances. Researchers have now created a fully fledged crystalline complex containing thorium-thorium bonds, synthesized and isolated under ordinary experimental conditions ( Nature 2021, DOI: 10.1038/s41586-021-03888-3 ). Stephen T. Liddle of the University of Manchester and colleagues made the new compound by combining a thorium precursor with a tetrasilyl cyclobutadiene dianion—a powerful reducing agent. This formed a complex containing a cluster of three thorium atoms flanked by cyclooctatetraenyl ligands and bridging chlorides. The dark-blue crystals decompose slowly at room temperature but remain stable at –35 °C. The researchers compared crystal structure data and spectroscopy and magnetic measurements with quantum chemical calculations and determined that the thorium cluster contains a three-center two-electron bond and that these delocalized electrons are σ aromatic. “It’s pretty much the last thing that anyone expected,” Liddle says. “It underlines to me" @default.
- W4367158769 created "2023-04-28" @default.
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- W4367158769 date "2021-09-13" @default.
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- W4367158769 title "Thorium-thorium bonding marks actinide milestone" @default.
- W4367158769 doi "https://doi.org/10.1021/cen-09933-scicon7" @default.
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