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By [[author]]賴韻文, [[author]]Yun-Wen Lai, 賴韻文 and Yun-Wen Lai


[[abstract]]1. E-Ru-CO (E = Te, Se) System When K2TeO3 was treated with 1 equiv of Ru3(CO)12 in methanol at 70 °C, the octahedral cluster [PPh4]2[TeRu5(CO)14]·CH2Cl2 was obtained in good yield. If K2TeO3 was treated with 2/3 equiv of Ru3(CO)12 in methanol at 80 °C, the unique high-nuclearity cluster [PPh4]2[Te4Ru8(CO)19] was obtained, which contains three novel m5-Te ligands. [PPh4]2[TeRu5(CO)14]·CH2Cl2 could transform to [PPh4]2[Te4Ru8(CO)19] upon the reaction with excess K2TeO3 in methanol at 80 °C. On the other hand, when K2SeO3 was treated with 5/3 equiv of Ru3(CO)12 in methanol at 70 °C, the octahedral cluster [PPh4]2[SeRu5(CO)14]·CH2Cl2 was produced. Further, the reaction of K2SeO3 with 2/3 equiv of Ru3(CO)12 in methanol at 70 °C formed the hydride-bridged octahedral complex [PPh4][HSe2Ru4(CO)10]. 2. E-Ru-Cu (E = Te, Se) System A series of novel octahedron-based E-Ru-Cu (E = Te, Se) cluster complexes, [ERu5(CO)14CuX]2-, [ERu5(CO)14(CuX)2]2-, [E2Ru4(CO)10- (CuX)2]2-, and [E2Ru10(CO)28Cu4X2]2- was produced from the reactions of [ERu5(CO)14]2- with CuX (X = Cl, Br, I). If [TeRu5(CO)14]2- was treated with [Cu(MeCN)4][BF4] in different ratios, the copper-incorporated Te-Ru-CO clusters, [Te2Ru10(CO)28- Cu3Cl]2- and TeRu5(CO)14(CuNCMe)2, were produced. Solvent-induced isomerization of TeRu5(CO)14(Cu-NCMe)2 was observed, which was supported by DFT calculation. The first ternary Te-Ru-Cu cluster, the chain polymer {[PPh4]2[Te2Ru4(CO)10Cu4Br2Cl2]·THF}?, was discovered from the reaction of K2TeO3 with Ru3(CO)12 in MeOH followed by the addition PPh4Br and CuCl. This infinite chain possesses the semiconducting property with a low band gap of approximately 0.37 eV. 3. Se/Ru/CO Clusters in the Alcohol System We have synthesized a series of double-octahedron clusters [Se4Ru10(CO)24(O2COMe)]3-, [Se4Ru10(CO)24(O2CMe)]3-, and [Se4Ru10(CO)24(O2CEt)]3- from the reaction of SeO32- with Ru3(CO)12 in alcohol solutions. The X-ray analysis shows that [Se4Ru10(CO)24(O2COMe)]3- and [Se4Ru10(CO)24(O2CMe)]3- each display two Se2Ru4(CO)10 octahedra linked by the Ru2(CO)4 group which is further bridged by the O2COMe or O2CMe group. Interestingly, when [SeRu5(CO)14]2- was refluxed in MeOH under an atmosphere of CO2, the O-H activation and CO2 insertion product [Se4Ru10(CO)24(O2COMe)]3- was obtained.

Topics: 金屬團簇化合物, 硒, 碲, 釕, Metal Cluster, Se, Te, Ru, [[classification]]39
Year: 2010
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