Synthesis and Crystal Structure of Two CuII‐benzene‐1,2,4,5‐tetracarboxylates with Three‐Dimensional Open Frameworks |
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| Authors: | Roberto Köferstein Christian Robl |
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| Affiliation: | 1. Institute of Inorganic and Analytical Chemistry, Friedrich‐Schiller‐University Jena, Humboldtstrasse 8, 07743 Jena, Germany;2. Institute of Chemistry, Inorganic Chemistry, Martin‐Luther‐University Halle‐Wittenberg, Kurt‐Mothes‐Strasse 2, 06120 Halle, Germany |
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| Abstract: | Two new three‐dimensional frameworks with zeolite‐like channels were prepared in the presence of 1,6‐diaminohexane. Cu1.5(H3N–(CH2)6–NH3)0.5[C6H2(COO)4] · 5H2O ( 1 ) crystallizes in the triclinic space group P$bar{1}$ with a = 772.56(7), b = 1110.36(7), c = 1111.98(8) pm, α = 98.720(7)°, β = 108.246(9)°, and γ = 95.559(7)°. Cu2(H3N–(CH2)6–NH3)0.5(OH)[C6H2(COO)4] · 3H2O ( 2 ) crystallizes in the monoclinic space group P2/c with a = 1159.34(11), b = 1059.44(7), c = 1582.2(2) pm, and β = 106.130(11)°. The Cu2+ coordination polyhedra are connected by [C6H2(COO)4]4– anions to yield three‐dimensional frameworks with wide centrosymmetric channel‐like voids. Complex 1 reveals voids extending along [100] with diagonals of 900 pm and 300 pm, whereas in complex 2 the diagonal of the nearly rectangular crossection of the channels extending parallel to [001] is 900 pm. The negative excess charges of the frameworks are compensated by [H3N–(CH2)6–NH3]2+ cations, which occupy the voids along with water molecules. The [H3N–(CH2)6–NH3]2+ cations are not connected to Cu2+ and have served as templates. |
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| Keywords: | Benzene‐1,2,4,5‐tetracarboxylate Metal‐organic‐framework Crystal structure Template synthesis Copper Diaminohexane |
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