摘要：SummaryTen lanthanacarborane complexes were synthesized to study the rare B−Hδ−∙∙∙Mn+inverse hydrogen bonds (IHBs). The average bonding energy of B−Hδ−∙∙∙Ln3+is theoretically determined to be larger than 24 kJ/mol, which is comparable to moderately strong hydrogen bonds (21–56 kJ/mol). In addition to NMR and IR, magnetometer was used to study the exchange-coupling interaction via such B−Hδ−∙∙∙Ln3+IHBs in detail, and the coupling constant is determined to be −2.0 cm−1, which is strong enough to compare with single-atom bridged dysprosium(III) complexes. Two imidazolin-iminato incorporated complexes have shown energy barrier for magnetization reversal larger than 1000 K, and the exchange-biasing effects are evident. Moreover, the bonding strengths of B−Hδ−∙∙∙Mn+IHBs are cation-dependent. If M = Na, the B−Hδ−∙∙∙Na+bonding energy is reduced to 14 kJ/mol, and the dimerization process is no longer reversible. The exchange-biasing effect is also disappeared. We believe such a finding extends our knowledge of IHBs.Graphical abstractDisplay OmittedHighlights•Cation-dependent inverse hydrogen bonds are found in lanthanacarborane complexes•The lanthanacarborane dimeric assembly via inverse hydrogen bonds is reversible•The average bonding energy of B−Hδ−∙∙∙Ln3+is larger than 24 kJ/mol•Inverse hydrogen bonded dysprosiacarborane dimers are single-molecule magnetsChemistry; Inorganic chemistry; Molecular inorganic chemistry; Magnetism.
