Synthesis and Reactions of Polynuclear Polyhydrido Rare Earth Metal Complexes Containing “(C5Me4SiMe3)LnH2” Units: A New Frontier in Rare Earth Metal Hydride Chemistry
作者： Zhaomin Hou , Masayoshi Nishiura , Takanori Shima
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摘要: A series of tetranuclear octahydrido rare earth metal complexes general formula [(C5Me4SiMe3)Ln(μ-H)2]4(THF)n (Ln = Sc, Y, Gd, Dy, Ho, Er, Tm, Lu; n 0, 1, or 2) that contain C5Me4SiMe3 as an ancillary ligand have been prepared and structurally characterized. These hydride clusters are soluble in common organic solvents such THF, toluene, hexane, maintain their framework solution. Such polynuclear polyhydrido exhibit extremely high unique reactivity toward a variety unsaturated substrates including CO, CO2, nitriles. The reaction these neutral polyhydrides with one equivalent [Ph3C][B(C6F5)4] affords the corresponding cationic [(C5Me4SiMe3)4Ln4H7(THF)n][B(C6F5)4], which can act catalysts for syndiospecific polymerization styrene regio- stereospecific cis-1,4-polymerization 1,3-cyclohexadiene. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
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