While uranium hydridoborate complexes containing the [BH4](-) moiety have been well-known in the literature for many years, species with functionalized borate centers remained considerably rare. We were now able to prepare several uranium hydridoborates (1-4) with amino-substituted borate moieties with high selectivity by smooth reaction of [Cp*2UMe2] (Cp* = C5Me5) and [Cp'2UMe2] (Cp' = 1,2,4-tBu3C5H2) with the aminoborane H2BN(SiMe3)2. A combination of nuclear magnetic resonance spectroscopy, deuteration experiments, magnetic SQUID measurements, and X-ray/neutron diffraction studies was used to verify the anticipated molecular structures and oxidation states of 1-4 and helped to establish a linear tridentate coordination mode of the borate anions.
Braunschweig, H., Gackstatter, A., Kupfer, T., Radacki, K., Franke, S., Meyer, K., Fucke, K., & Lemee-Cailleau, M. H. (2015). Uranium Hydridoborates: Synthesis, Magnetism, and X-ray/Neutron Diffraction Structures. Inorganic Chemistry, 54(16), 8022-8028. https://doi.org/10.1021/acs.inorgchem.5b01205