Synthese,Struktur und Thermolyse von NH4[Re3Br10] |
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| Authors: | Angela M ller,Gerd Meyer |
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| Affiliation: | Angela Möller,Gerd Meyer |
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| Abstract: | ![]()
Synthesis, Structure and Thermolysis of NH4[Re3Br10] NH4[Re3Br10] crystallizes as dark brown single crystals upon slow cooling of a hot, saturated hydrobromic-acid solution of [Re3Br9(H2O)2] after the addition of NH4Br. The crystal structure (monoclinic, C2/m (Nr. 12); Z = 4; a = 1461.6(7), b = 1 085.6(4), c = 1030.3(7) pm, β = 92.63(4)°, Vm = 245.9(4)cm3/mol; R = 0.097, Rw = 0.043) contains [Re3Br12]? units that share two common edges. These chains run along [010] and are held together by NH4+ ions. Each NH4+ is surrounded by eight Br? from four different chains. The first step of the thermal decomposition at 290°C is the disproportionation to ReBr3 (ReCl3 type), rhenium metal and (NH4)2[ReBr6]. Secondly, the internal reduction of (NH4)2[ReBr6] at 390°C to rhenium metal takes place. |
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| Keywords: | Rhenium complexes synthesis crystal structure thermal behaviour |
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