Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
190 0 |
SM ISO690:2012 MOHAPATRA, Swagat Kumar, ZHANG, Yadong, SANDHU, Bhupinder, FONARI, Marina, TIMOFEEVA, Tatiana, MARDER, Seth R., BARLOW, Stephen V.. Synthesis, characterization, and crystal structures of molybdenum complexes of unsymmetrical electron-poor dithiolene ligands. In: Polyhedron, 2016, nr. 116, pp. 88-95. ISSN 0277-5387. DOI: https://doi.org/10.1016/j.poly.2016.04.025 |
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Polyhedron | ||||||
Numărul 116 / 2016 / ISSN 0277-5387 /ISSNe 1873-3719 | ||||||
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DOI:https://doi.org/10.1016/j.poly.2016.04.025 | ||||||
Pag. 88-95 | ||||||
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Rezumat | ||||||
Mo(S2C2(CF3)2)3, 1a, has proven a useful p-dopant in organic electronics. To develop more soluble p-dopants, MoS92−was treated with alkynes CF3CCCO2Me and CF3CCCOCF3to give the dianions of the corresponding tris(dithiolene) complexes, 1b2−and 1c2−, respectively, which were then oxidized to neutral molybdenum tris[1-(methoxycarbonyl)-2-(trifluoromethyl)-ethane-1,2-dithiolene], 1b, and molybdenum tris[1-(trifluoroethanoyl)-2-(trifluoromethyl)ethane-1,2-dithiolene], 1c, using NO+PF6−. The crystal structures of (NEt4+)21b2−, (NEt4+)21c2−, and neutral 1c have been determined. In all three cases, the metal coordination is approximately trigonal prismatic and the major isomer is cis (approximately C3v). The structure of 1b2−is distorted by a twist towards pseudo-octahedral coordination similar to that seen in structures of 1a2−and Mo(S2C2(CO2Me)2)32−, 1d2−, salts, and that of 1c exhibits marked folds between the planes formed by the ligand atoms and those formed by the Mo and coordinated S atoms, similar to those seen in the structure of 1a. On the other hand, the metal dithiolene core of 1c2−is essentially undistorted from C3vsymmetry. The oxidant strength of the neutral molecules increases in the order 1d < 1b < 1a < 1c, with the potentials ranging from −0.02 to +0.39 V versus the ferrocenium/ferrocene couple. |
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Cuvinte-cheie Dithiolene, electrochemistry, molybdenum, Redox chemistry, Substituent effects |
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