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Abstract
Single crystals of diisopropylammonium dicitratoborate of the formula (C3H7)2NH2[(C6H6O7)2B] (I) were prepared and characterized by X-ray diffraction. The crystals are monoclinic, space group C2/c, a = 15.9978(5) A, b = 11.0805(4) A, c = 13.1872(4) A, α = 90°, β = 103.34(1)°, γ = 90°, Z = 8, V = 2274.5 (1) A 3, Z = 8, ρcalc = 1.440 g/cm3, 2237 reflections with I > 2σ(I); R1 = 0.0408. Structure I is built from complex spiran-type dicitratoborate anions and diisopropylammonium cations. In the crystal packing, the anions and the cations form staggered stacks linked by a system of hydrogen bonds involving three independent contacts O(N)-H...O. X-ray diffraction data for structure I were compared with those for complexes of boric and citric acids with ammonium and alkylammonium cations.
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