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首页> 外文期刊>Organometallics >Carborane complexes of ruthenium: Synthesis of the bimetal compounds [MRu(mu-CC6H4Me-4)(CO)(4)(eta(5)-7,8-C2B9H11){kappa(3)-HB(pz)(3)}] (M = Mo or W) and their reactions with sulfur and selenium
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Carborane complexes of ruthenium: Synthesis of the bimetal compounds [MRu(mu-CC6H4Me-4)(CO)(4)(eta(5)-7,8-C2B9H11){kappa(3)-HB(pz)(3)}] (M = Mo or W) and their reactions with sulfur and selenium

机译:钌的碳硼烷络合物:双金属化合物的合成[MRu(mu-CC6H4Me-4)(CO)(4)(eta(5)-7,8-C2B9H11){kappa(3)-HB(pz)(3) }](M = Mo或W)及其与硫和硒的反应

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摘要

Addition of the reagent [Ru(CO)(2)(thf)(eta(5)-7,8-C2B9H11)] (thf = tetrahydrofuran) to the compounds [M(=CC6H4Me-4)(CO)(2){kappa(3)-HB(pz)(3)}] (M = Mo or W, HB(pz)(3) = hydrotris(pyrazol-1-yl)borato) in CH2Cl2 affords, respectively, the bimetal species [MRu(mu-CC6H4Me-4)(CO)(4)(eta(5)-7,8-C2B9H11){kappa(3)-HB(pz)(3)}] (M = Mo (4a), M = W (4b)). These complexes are readily cleaved by donor molecules, including thf, but they are stable in CH2Cl2 or toluene. X-ray diffraction studies established the molecular structures of 4b and the related species [WRu(mu-CC6H4Me-4)(CO)(4)(eta(5)-7,8-C2B9H11)(eta(5)-C5H5)] (2b) In both molecules very long Ru-W bonds (ca. 3 Angstrom) are asymmetrically bridged by the tolylmethylidyne groups (mu-C-W av 1.92 Angstrom, mu-C-Ru av 2.21 Angstrom). The complexes 4 react with sulfur or selenium in CH2Cl2 to give the compounds [MRu(mu-1 kappa C-alpha,1:2 kappa E-ECC6H4Me-4)(CO)(4)(eta(5)-7,8-C2B9H11){kappa(3)-HB(pz)(3)}] (M = Mo, E = S (6a), Se (6c); M = W, E = S (6b), Se (6d)). The structure of 6b was established by X-ray diffraction. The molecule possesses an unusual structure in which Ru(CO)(2)(eta(5)-7,8-C2B9H11) and W(CO)(2){kappa(3)-HB(pz)(3)} units are bridged by a thioacyl group which is eta(2)-coordinated to the tungsten through its carbon and sulfur atoms and bound to the ruthenium only through the sulfur atom. There is no metal-metal bond as both the W and Ru atoms have filled valence shells. The NMR data for the new compounds are reported and discussed. [References: 42]
机译:向化合物[M(= CC6H4Me-4)(CO)(2)添加试剂[Ru(CO)(2)(thf)(eta(5)-7,8-C2B9H11)](thf =四氢呋喃) {kappa(3)-HB(pz)(3)}](M = Mo或W,HB(pz)(3)=氢三(吡唑-1-基)硼酸根)分别提供双金属物种[ MRu(mu-CC6H4Me-4)(CO)(4)(eta(5)-7,8-C2B9H11){kappa(3)-HB(pz)(3)}](M = Mo(4a),M = W(4b))。这些配合物很容易被供体分子(包括thf)裂解,但在CH2Cl2或甲苯中稳定。 X射线衍射研究确定了4b及其相关物质[WRu(mu-CC6H4Me-4)(CO)(4)(eta(5)-7,8-C2B9H11)(eta(5)-C5H5)的分子结构](2b)在两个分子中,很长的Ru-W键(约3埃)被甲苯基甲基亚炔基(mu-CW av 1.92埃,mu-C-Ru av 2.21埃)不对称桥连。络合物4在CH2Cl2中与硫或硒反应,得到化合物[MRu(mu-1 kappa C-alpha,1:2 kappa E-ECC6H4Me-4)(CO)(4)(eta(5)-7,8 -C2B9H11){kappa(3)-HB(pz)(3)}](M = Mo,E = S(6a),Se(6c); M = W,E = S(6b),Se(6d) )。通过X射线衍射确定6b的结构。该分子具有不寻常的结构,其中Ru(CO)(2)(eta(5)-7,8-C2B9H11)和W(CO)(2){kappa(3)-HB(pz)(3)}单元硫酰基通过硫代酰基桥接,该硫代酰基通过碳和硫原子与钨配位(2),仅通过硫原子与钌键合。由于W和Ru原子都充满了价态壳,因此没有金属-金属键。报告并讨论了新化合物的NMR数据。 [参考:42]

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