Facial π⋯Cl⋯π interactions as the directing motif of the supramolecular structures of Mg2+ and Ca2+ bis[hydrotris(pyrazolyl)borate] chloroform disolvates

María Gabriela Ballinas-López, Itzia I. Padilla-Martínez, Francisco J. Martínez-Martínez, Herbert Höpfl, Efrén V. García-Báez

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Abstract

The isomorphous complexes bis[hydrotris(pyrazolyl)borato]-magnesium(II) chloroform disolvate, [Mg(C9H10BN6) 2]⋯-2CHCl3, and bis[hydrotris(pyrazolyl)borato] calcium(II) chloroform disolvate, [Ca(C9́H10BN 6)2]·2CHCl3, crystallize in the cubic space group Pa3̄ with Z = 4. The metal atoms occupy sites of 3̄ symmetry, and their coordination is very similar to that found for the unsolvated Mg[HB(Pz)3]2 and Ca[HB-(Pz)3] 2 complexes (Pz is pyrazole). The inclusion of chloroform molecules on threefold rotation axes not only leads to high-symmetry crystal structures but also plays an important role in stabilizing the three-dimensional supramolecular architecture through facial Pz⋯Cl⋯Pz interactions. © 2006 International Union of Crystallography.
Original languageAmerican English
JournalActa Crystallographica Section C: Crystal Structure Communications
DOIs
StatePublished - 1 Apr 2006

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