Neutral tellurium rings in the coordination polymers [Ru(Te9)](InCl4)2, [Ru(Te8)]Cl2, and [Rh(Te6)]Cl3 |
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Authors: | Günther Anja Isaeva Anna Baranov Alexey I Ruck Michael |
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Institution: | Department of Chemistry and Food Chemistry, Dresden University of Technology, 01062 Dresden, Germany. |
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Abstract: | Shiny black, air‐insensitive crystals of tellurium‐rich one‐dimensional coordination polymers were synthesized by melting a mixture of the elements with TeCl4. The compounds Ru(Te9)](InCl4)2 and Ru(Te8)]Cl2 crystallize in the monoclinic space group type C2/c, whereas Rh(Te6)]Cl3 adopts the trigonal space group type R$\bar 3Shiny black, air-insensitive crystals of tellurium-rich one-dimensional coordination polymers were synthesized by melting a mixture of the elements with TeCl(4). The compounds Ru(Te(9))](InCl(4))(2) and Ru(Te(8))]Cl(2) crystallize in the monoclinic space group type C2/c, whereas Rh(Te(6))]Cl(3) adopts the trigonal space group type R ?3c. In the crystal structures, linear, positively charged M(m+) (Te(n)(±0))] (M=Ru, m=2; Rh, m=3) chains run parallel to the c axes. Each of the uncharged Te(n) molecules (n=6, 8, 9) coordinates two transition-metal atoms as a bridging bis-tridentate ligand. Because the coordinating tellurium atoms act as electron-pair donors, the 18-electron rule is fulfilled for the octahedrally coordinated transition-metal cations. Based on DFT calculations, the quantum theory of atoms in molecules (QTAIM) and the electron localizability indicator (ELI) provide insight into the principles of the polar donor bonding in these complexes. Comparison with optimized ring geometries reveals substantial tension in the coordinating tellurium molecules. |
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Keywords: | allotropy coordination polymers donor bonding electron localizability indicator tellurium |
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