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Published on: May 3, 2019
A binuclear thorium complex with a Th-O-Th unit
Yifei He1,2, Yichen Huang3, Kang Liu4
1State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University Yinchuan 750021 China xiangyuliu432@126.com gy202054@163.com.
None:
Complex 1, [(TrapenTMS)ThCl, TrapenTMS = N(CH2Ph(o-NSiMe3)3)], reacts with sodium azide to afford the dimeric complex 2, [(TrapenTMSN3Th)2]. Treatment of 2 with KC8 yields a binuclear oxo-bridged thorium complex 3, [(TrapenTMSTh)2(µ-O)]. The crystal structure of 3 reveals a highly symmetrical configuration with a Th-O-Th unit, and the Th-O bond length is 2.271(2) Å. Density functional theory calculations indicate significant covalent character in the Th-O-Th interaction, surpassing that in related Th-N-Th systems and the Th-O bonding in complex 3 displays stronger covalent interactions.
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