Molecular dynamics in tetrafluoridoborate salts of divalent metals studied by nuclear magnetic resonance spectroscopyGradišek, Anton (Avtor) Radan, Kristian (Avtor) Lozinšek, Matic (Avtor) fluoridesmetal tetrafluoridoboratesmolecular dynamicsnuclear magnetic resonance spectroscopyFluoridoborate (BF4−) salts are linchpins across synthesis and catalysis, key constituents of ionic liquids, and promising electro-lytes and additives in next-generation multivalent rechargeable batteries. Despite this reach, quantitative links between crystalchemistry and anion motion remain scarce. Here, we present a molecular dynamics study of four such salts, namely M(BF4 ) 2(M = Ca 2+, Sr 2+, Ba 2+, Cd2+), by means of nuclear magnetic resonance spectroscopy (NMR). We measured the temperature depen-dence of static 19 F NMR spectra and spin-lattice relaxation and determined the values of activation energies for the thermally-activated reorientations for the BF4− tetrahedra. We draw a comparison with systems with similar geometries, such as thewell-studied complex metal borohydrides.Wiley20262026-03-13 09:36:08Neznano28297Nemčijasl© 2026 The Author(s).