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In the title complex, [CuICuII(CN)3(C4H12N2)2], the CuI and CuII ions and a bridging cyanide group lie on a twofold rotation axis. The CuII ion is in a slightly-distorted square-pyramidal coordination environment, with the N atoms of the two symmetry-related N-ethyl­ethylenedi­amine ligands occupying the basal positions and an N-bonded cyanide group in the apical position. The CuI ion is in a trigonal-planar coordination environment, bonded to the C atom of the bridging cyanide group and to two terminal cyanide groups. In the crystal, N—H...N hydrogen bonds involving two of the symmetry-unique N—H groups of the N-ethyl­ethylenedi­amine ligands and the N atoms of the terminal cyanide ligands link the mol­ecules into strands along [010].

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In the title compound, [μ-(2,6,7-η:3,4,5-η)-cycloocta-2,4,6-trienone]bis­(tri­carbonyl­iron)(FeFe), [Fe2(C8H8O)(CO)6], the diiron hexa­carbonyl moiety has a sawhorse arrangement, with the OC—Fe—Fe—CO fragment forming the horizontal bar of the horse, and the other four carbonyl groups the legs. The Fe—Fe distance is 2.795 (2) Å. Each Fe atom is also bonded to three C atoms of the cyclo­octa­trienone ring. One Fe atom forms a σ-bond with one ring C atom, with Fe—C = 2.109 (2) Å, and also a metal–olefin π-bond with two C atoms on the other side of the ring, with Fe—C distances of 2.238 (2) and 2.236 (3) Å. The second Fe atom forms a η3-allyl bond with three other ring atoms, with Fe—C bond lengths of 2.158 (2), 2.062 (2), and 2.123 (3) Å. Counting the π- and π-allyl inter­actions as one bond, the coordinations of the Fe atoms can, respectively, be approximated as octa­hedral and trigonal bipyramidal.

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In the title compound, C22H32O4, the atoms of the methyl ester group and the alk­oxy O atoms are all coplanar with the central aromatic ring, with an r.m.s. deviation of 0.008 Å. Bonds to the methyl­ene and cyclo­hexyl groups are also very close to this plane, so that the mol­ecule is essentially flat, apart from the cyclo­hexyl groups. The mean planes through the cyclo­hexyl groups are tilted by 30.08 (9) and 36.14 (7)° with respect to the central aromatic ring. In the crystal, pairs of mol­ecules linked by C—H...O hydrogen bonds form planar units which are stacked along the a axis, with an average inter­planar distance of 3.549 (2) Å. Stacking appears to be stabilized by further weak C—H...O hydrogen bonds.
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