Syntheses and structures of heterobimetallic complexes derived from [Ga(edt)2] as a metalloligand (edt = SC2H4S): Potential precursors for ternary materials MGaS2 (M = Cu or Ag) |
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Authors: | Yan-Gong Han |
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Institution: | Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, Ma’anshan, Anhui 243002, PR China |
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Abstract: | Metathesis reaction between equimolar amount of Et4N]GaCl4] and Na2edt in methanol resulted in the formation of the dichloro complex Et4N]Ga(edt)Cl2] (1), whereas reaction of Et4N]GaCl4] with two equivalents of Na2edt in methanol gave the complex Et4N]Ga(edt)2] (2) which can act as a metalloligand. Treatment of 2 with M(PPh3)2NO3 in DMF/CH2Cl2 afforded the heterobimetallic complexes Ga(edt)2M-(PPh3)2] (M = Cu 3, Ag 4) in moderate yields. The structures of 1-4 were determined by single-crystal X-ray diffraction analyses. Both Ga(edt)Cl2]− and Ga(edt)2]− anions have a distorted tetrahedral geometry. The former consists of one five-membered ring formed by chelating dithiolate and two terminal chloride atoms while the latter consists of two five-membered rings formed by two the chelating dithiolates. Complexes 3 and 4 consist of metalloligand Ga(edt)2]− anion chelated to M(PPh3)2]+via the sulfur atoms. Both tetrahedrally coordinated Ga and Cu(Ag) atoms are bridged by two sulfur atoms, forming a planar “GaS2M” (M = Cu, Ag) core. Thermogravimetry analysis revealed that heterobimetallic complexes 3 and 4 decomposed to give the corresponding ternary metal sulfide materials. |
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Keywords: | Synthesis Gallium Copper Silver Metalloligand Metal sulfide materials |
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