`0'‐ and `8'‐shaped complexes generated from a nano‐sized oxadiazole‐containing organic ligand with CdI2 and CuI. Issue 1 (15th January 2014)

• Record Type: Journal Article
• Authors: Liu, Zhao‐Cai; Liu, Qi‐Kui; Li, Yan‐An; Ma, Jian‐Ping; Dong, Yu‐Bin
• Is Part Of: Acta crystallographica. Volume 70:Issue 1(2014:Jan.)
• Page Start: 31
• Page End: 36
• Publication Date: 2014-01-15
• Subjects: Crystallography -- Periodicals; Crystals -- Periodicals; 548.3
• DOI: 10.1107/S2053229613031719
• Languages: English
• ISSNs: 2053-2296

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>A new nano‐sized rigid double‐armed oxadiazole‐bridged organic ligand, 2, 5‐bis{2‐methyl‐5‐[2‐(pyridin‐3‐yl)ethenyl]phenyl}‐1, 3, 4‐oxadiazole, C<sub>30</sub>H<sub>20</sub>N<sub>4</sub>O, <italic>L</italic> or (I), which adopts a <italic>cis</italic> conformation in the solid state, has been synthesized and used to create the two novel metallocycle complexes (2, 5‐bis{2‐methyl‐5‐[2‐(pyridin‐3‐yl‐κ<italic>N</italic>)ethenyl]phenyl}‐1, 3, 4‐oxadiazole)diiodidocadmium(II) dichloromethane monosolvate, [CdI<sub>2</sub>(C<sub>30</sub>H<sub>20</sub>N<sub>4</sub>O)]·CH<sub>2</sub>Cl<sub>2</sub>, (II), and di‐μ‐iodido‐bis[(2, 5‐bis{2‐methyl‐5‐[2‐(pyridin‐3‐yl‐κ<italic>N</italic>)ethenyl]phenyl}‐1, 3, 4‐oxadiazole)copper(I)], [Cu<sub>2</sub>I<sub>2</sub>(C<sub>30</sub>H<sub>20</sub>N<sub>4</sub>O)<sub>2</sub>], (III). Molecules of complex (II) adopts a 20‐membered `0'‐shaped metallocycle structure with crystallographic mirror symmetry. The discrete units are linked into one‐dimensional chains through intermolecular π–π and C—H...π interactions. In (III), the two I atoms and two Cu<sup>I</sup> atoms form a {Cu<sub>2</sub>(μ‐I)<sub>2</sub>} cluster. One {Cu<sub>2</sub>(μ‐I)<sub>2</sub>} cluster and two <italic>L</italic> ligands form two 20‐membered monometallic rings in a head‐to‐head fashion, leading to a discrete centrosymmetric `8'‐shaped metallocyclic complex. These metallocycles stack together <italic>via</italic> two kinds of intermolecular π–π interactions to generate a two‐dimensional network in the <italic>ac</italic> plane. The luminescence properties of (I)–(III) were investigated in the solid state at room temperature and displayed an obvious red shift.</p> </abstract>