Abstract
A red crystal of [Cu( trans-[14] diene)] 2+ (ClO 4 −) 2 was crystallized from a methanol-water or acetone-water solution by slow evaporation of the solvent. This crystal has the chemical formula C 16H 32N 4Cu(II) (ClO 4) 2, FW = 542.92. Using a Syntex P 1 auto-diffractometer, the crystal data were determined: monoclinic, P2 l / c, a = 10.487(9), b = 16.971(15), c = 13.855(13) A ̊ , β = 105.17(7)°, Z = 4, V = 2379.9 A ̊ 3, D c = 1.52, D m = 1.52 g cm −3 (by flotation), μ = 38.23 cm −1 for CuK α. The structure was mainly solved by heavy atom method and difference Fourier synthesis. The hydrogen atoms attached to the nitrogen atoms in the trans-diene are on the same side ( cis) of the macrocyclic plane. The two perchlorate ions form hydrogen bonds with the NH groups and therefore are located in the cis configuration as hydrogen atoms are. The copper atom and four nitrogen atoms are coplanar within 0.05 Å.
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