The coordination chemistry of two symmetric fluorene‐based organic ligands with cuprous chloride. (21st November 2013)

• Record Type: Journal Article
• Authors: Liu, Yan‐Fei; Zhao, Chao‐Wei; Ma, Jian‐Ping; Liu, Qi‐Kui; Dong, Yu‐Bin
• Is Part Of: Acta crystallographica. Volume 69:Part 12(2013:Dec.)
• Page Start: 1488
• Page End: 1493
• Publication Date: 2013-11-21
• Subjects: Crystallography -- Periodicals; Crystals -- Periodicals; 548.05
• DOI: 10.1107/S0108270113030163
• Languages: English
• ISSNs: 0108-2701

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Two novel symmetric fluorene‐based ligands, namely, 2, 7‐bis(1<italic>H</italic>‐imidazol‐1‐yl)‐9, 9‐dimethyl‐9<italic>H</italic>‐fluorene [<italic>L</italic>1 or (I), C<sub>21</sub>H<sub>18</sub>N<sub>4</sub>] and 2, 7‐bis(1<italic>H</italic>‐imidazol‐1‐yl)‐9, 9‐dipropyl‐9<italic>H</italic>‐fluorene (<italic>L</italic>2), have been used to construct the coordination polymers <italic>catena</italic>‐poly[[dichloridodicopper(I)(<italic>Cu</italic>—<italic>Cu</italic>)]‐μ‐2, 7‐bis(1<italic>H</italic>‐imidazol‐1‐yl)‐9, 9‐dimethyl‐9<italic>H</italic>‐fluorene], [Cu<sub>2</sub>Cl<sub>2</sub>(C<sub>21</sub>H<sub>18</sub>N<sub>4</sub>)]<sub><italic>n</italic></sub>, (II), and <italic>catena</italic>‐poly[[tetra‐μ<sub>2</sub>‐chlorido‐tetracopper(I)]‐bis[μ‐2, 7‐bis(1<italic>H</italic>‐imidazol‐1‐yl)‐9, 9‐dipropyl‐9<italic>H</italic>‐fluorene]], [Cu<sub>4</sub>Cl<sub>4</sub>(C<sub>25</sub>H<sub>26</sub>N<sub>4</sub>)<sub>2</sub>]<sub><italic>n</italic></sub>, (III). There are three types of C—H...N hydrogen bonds in (I), resulting a two‐dimensional network in the <italic>ab</italic> plane, including a chiral helical chain along the <italic>b</italic> axis. Compounds (II) and (III) are related one‐dimensional polymers. In both, Cu<sup>I</sup> atoms connect the symmetric ligands (<italic>L</italic>1 or <italic>L</italic>2) into a one‐dimensional chain. In (II), the {[Cu<sup>I</sup>Cl<sub>2</sub>]<sup>−</sup>} unit, acting as a co‐anion, adheres to the one‐dimensional chain through a weak Cu...Cu interaction. However, in (III), the {[Cu<sup>I</sup><sub>2</sub>Cl<sub>4</sub>]<sup>2−</sup>} unit links two different chains into a one‐dimensional rope‐ladder‐type chain. In addition, there are C—H...Cl hydrogen bonds and π–π interactions in the extended structures of (II) and (III), the difference is that the chains in (II) are linked into a two‐dimensional network while the chains in (III) are stacked into a three‐dimensional framework.</p> </abstract>