首页> 外文期刊>Chemistry: A European journal >Reactivity of [M-2(mu-Cl)(2)(cod)(2)] (M=Ir, Rh) and [Ru(Cl)(2)(cod)(CH3CN)(2)] with Na[H2B(bt)(2)]: Formation of Agostic versus Borate Complexes
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Reactivity of [M-2(mu-Cl)(2)(cod)(2)] (M=Ir, Rh) and [Ru(Cl)(2)(cod)(CH3CN)(2)] with Na[H2B(bt)(2)]: Formation of Agostic versus Borate Complexes

机译:[M-2(mu-Cl)(2)(cod)(2)](M = Ir,Rh)和[Ru(Cl)(2)(cod)(CH3CN)(2)]与Na [ H2B(bt)(2)]:形成硼酸与硼酸盐复合物

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摘要

Treatment of [M-2(-Cl)(2)(cod)(2)] (M=Ir and Rh) with Na[H2B(bt)(2)] (cod=1,5-cyclooctadiene and bt=2-mercaptobenzothiazolyl) at low temperature led to the formation of dimetallaheterocycles [(Mcod)(2)(bt)(2)], 1 and 2 (1: M=Ir and 2: M=Rh) and a borate complex [Rh(cod){(2)-S,S-H2B(bt)(2)}], 3. Compounds 1 and 2 are structurally characterized metal analogues of 1,5-cyclooctadiene. Metal-metal bond distances of 3.6195(9)angstrom in 1 and 3.6749(9)angstrom in 2 are too long to consider as bonding. In an attempt to generate the Ru analogue of 1 and 2, that is [(Rucod)(2)(bt)(2)], we have carried out the reaction of [Ru(Cl)(2)(cod)(CH3CN)(2)] with Na[H2B(bt)(2)]. Interestingly, the reaction yielded agostic complexes [Ru(cod)L{(3)-H,S,S-H2B(bt)(2)}], 4 and 5 (4: L=Cl; 5: L=C7H4NS2). One of the key differences between 4 and 5 is the presence of different ancillary ligands at the metal center. The natural bond orbital (NBO) analysis of 1 and 2 shows that there is four lone pairs of electrons on each metal center with a significant amount of d character. Furthermore, the electronic structures and the bonding of these complexes have been established on the ground of quantum-chemical calculations. All of the new compounds were characterized by IR, H-1, B-11, (CNMR)-C-13 spectroscopy, and X-ray crystallographic analysis.
机译:用Na [H2B(bt)(2)](cod = 1,5-环辛二烯和bt = 2)处理[M-2(-Cl)(2)(cod)(2)](M = Ir和Rh) -巯基苯并噻唑基)在低温下导致形成双金属杂环[(Mcod)(2)(bt)(2)],1和2(1:M = Ir和2:M = Rh)和硼酸盐络合物[Rh( cod){(2)-S,S-H2B(bt)(2)}],化合物3和1是化合物1,5-环辛二烯的结构特征。 1的3.6195(9)埃和2的3.6749(9)埃的金属-金属键合距离太长,无法视为键合。为了生成1和2的Ru类似物,即[(Rucod)(2)(bt)(2)],我们进行了[Ru(Cl)(2)(cod)(CH3CN) )(2)]与Na [H2B(bt)(2)]。有趣的是,该反应产生了异形络合物[Ru(cod)L {(3)-H,S,S-H2B(bt)(2)}],4和5(4:L = Cl; 5:L = C7H4NS2) 。 4和5之间的主要区别之一是在金属中心存在不同的辅助配体。 1和2的自然键轨道(NBO)分析表明,每个金属中心上有4个孤对电子,具有显着的d特性。此外,已经基于量子化学计算建立了电子结构和这些配合物的键合。所有新化合物均通过IR,H-1,B-11,(CNMR)-C-13光谱和X射线晶体学分析进行了表征。

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