Silver-Dabco Coordination Networks with Distinct Carbaborane Anions: Investigating Ag···H–B and Ag···I–B Interactions

Abstract

A novel series of metal–organic frameworks (MOFs) based on Ag(I) and the nitrogen-bridging ligand 1,4-diazabicyclo[2.2.2]octane (dabco) along with the incorporation of distinct carbaborane anions were synthesized and isolated as crystalline materials. Single-crystal X-ray diffraction analysis unveiled novel materials formulated as [Ag(dabco)][Cobdc] (1), [Ag(dabco)(PhCB9H9)] (2), [Ag(dabco)(PhCB9H8I)] (3), and [Ag(dabco)(PhCB11H5I6)] (4), which were further characterized by Fourier-transform infrared spectroscopy and elemental analysis. Interestingly, despite the use of distinct carbaborane anions, all the materials feature one-dimensional (1D) coordination networks with most of the bulky anions, particularly all the phenyl-carbaborane anion [PhCB9H9]−, [PhCB9H8I]−, and [PhCB11H5I6]−, incorporated in the coordination networks through Ag···H–B coordinative interactions or Ag···I–B coordination bonds. However, the influence of the distinct carbaborane anions is clearly reflected in the coordination features...