Abstract
The title compound, {[CuI(bpe)]·0.25(bpe)} n , was synthesized similarly to (CuI)2(bpe) [Neal et al. (2019 ▸). IUCrData, 4, x190122] with red crystals grown from aceto-nitrile solutions of CuI and the bpe ligand [bpe = 1,2-bis-(pyridin-4-yl)ethene, C12H10N2]. The structure of the title compound is a type 1 complex in the Graham nomenclature [Graham et al. (2000 ▸). Inorg. Chem. 39, 5121-5132], having rhombic dimers of Cu2I2 that are bridged by two bpe ligands, to form oligomeric ribbons arranged as stairsteps. The step height is 2.8072 (11) Å, which is the Cu-Ii distance of the dimer [symmetry code (i): 1-x, 2-y, 1-z]. The resulting polymer displays a two-dimensional honeycomb framework along the (01) plane, and disordered free bpe mol-ecules fill the voids in the crystal.
Highlights
The resulting polymer displays a two-dimensional honeycomb framework along the (011) plane, and disordered free bpe molecules fill the voids in the crystal
Each bpe ligand connects two copper(I) atoms to form oligomeric zigzag ribbons of CuI(bpe), which can be classified as a type 1 complex (Graham et al, 2000), where bpe is 1,2-bis(pyridin-4-yl)ethene
The title compound is quite similar to structures of [CuI(bpe)] containing guest aniline or p-toluidine molecules (Yang et al, 2011), except that it contains a bpe molecule, which is disordered over two inversion centers, with occupancy of 0.25
Summary
The structure of the title compound contains discrete rhombic dimers of Cu2I2, where the Cu—I distance is 2.6891 (9) A , the distance across the dimer (Cu—Ii distance) is 2.8072 (11) A , and the CuÁ Á ÁCui separation is 3.544 (1) A [symmetry code (i): 1 À x, 2 À y, 1 À z]. Each bpe ligand connects two copper(I) atoms to form oligomeric zigzag ribbons of CuI(bpe), which can be classified as a type 1 complex (Graham et al, 2000), where bpe is 1,2-bis(pyridin-4-yl)ethene. These ribbons are arranged as stairsteps with each stair resulting from the Cu2I2 dimer, the step height is 2.8072 (11) A (the Cu—Ii distance, Fig. 1). The use of SQUEEZE (Spek, 2015) seemed less ideal as the position of the guest was evident in difference maps
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