Bromide hydrogen oxalate salts with the diprotonated 1,4-diazabicyclo[2.2.2]octane counterion
2020
Ndiaye, Mamadou | Diop, Mouhamadou Birame | Samb, Abdoulaye | Diop, Libasse | Oliver, Allen G. | Plasseraud, Laurent
Two new salts composed of the diprotonated 1,4-diazabicyclo[2.2.2]octane (DABCO) molecule as the cations and bromide and hydrogen oxalate as the anions have been isolated and structurally characterized by X-ray diffraction analysis. The salt [DABCOH₂]{[HC₂O₄][Br]} (1) crystallizes in the orthorhombic system, space group P2₁2₁2₁ with a = 9.0809(7), b = 9.5156(7), c = 12.3558(9) Å, V = 1067.67(14) ų and Z = 4. The salt [DABCOH₂]₂{[HC₂O₄][Br]₃}·H₂O (2) crystallizes in the orthorhombic system, space group Pnma with a = 26.6554(17), b = 7.3711(4), c = 10.7421(7) Å, V = 2110.6(2) ų and Z = 4. The compounds were prepared from ethanolic solutions of [DABCOH₂][HC₂O₄]₂ (L₁) and ZnBr₂ in molar ratios of 2:1 and 1:1, respectively. The salts 1 and 2 exhibit extended hydrogen bonding networks leading to supramolecular topologies.
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