Authors: Roberto Köferstein, Christian Robl
Two new three-dimensional frameworks with zeolite-like channels have been 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-1with a = 772.56(7), b = 1110.36(7), c = 1111.98(8) pm, alpha = 98.720(7)°, beta = 108.246(9)° and gamma = 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 = 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.
Comments: 9 Pages. The paper was published in: Z. Anorg. Allg. Chem. 640 (2014) 310—316 (DOI: 10.1002/zaac.201300527)
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