Related Experiment Video
Updated: Mar 3, 2026

Author Spotlight: Accelerating Discovery in Microporous Material Chemistry
Published on: October 6, 2023
Mo2 B4 O9 -Connecting Borate and Metal-Cluster Chemistry
Martin K Schmitt1, Oliver Janka2, Rainer Pöttgen2
1Institut für Allgemeine, Anorganische und Theoretische Chemie, Universität Innsbruck, Innrain 80-82, 6020, Innsbruck, Austria.
Abstract:
We report on the first thoroughly characterized molybdenum borate, which was synthesized in a high-pressure/high-temperature experiment at 12.3 GPa/1300 °C using a Walker-type multianvil apparatus. Mo2 B4 O9 incorporates tetrahedral molybdenum clusters into an anionic borate crystal structure-a structural motif that has never been observed before in the wide field of borate crystal chemistry. The six bonding molecular orbitals of the [Mo4 ] tetrahedron are completely filled with 12 electrons, which are fully delocalized over the four molybdenum atoms. This finding is in agreement with the results of the magnetic measurements, which confirmed the diamagnetic character of Mo2 B4 O9 . The two four-coordinated boron sites can be differentiated in the 11 B MAS-NMR spectrum because of the strongly different degrees of local distortions. Experimentally obtained IR and Raman bands were assigned to vibrational modes based on DFT calculations.
More Related Videos
04:51Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange
Published on: June 23, 2023
07:14Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
Published on: May 12, 2023
Related Concept Videos
Valence Bond Theory
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Hydroboration-Oxidation of Alkenes
Coordination Number and Geometry
Coordination Compounds and Nomenclature
Properties of Organometallic Compounds