Synthesis and C−C Coupling Reactivity of a Dinuclear NiI−NiI Complex Supported by a Terphenyl Diphosphine
摘要:
Mono- and bimetallic complexes of nickel supported by a terphenyl diphosphine have been synthesized. The reported complexes show diverse metal-arene interactions in the solid state. Reactions of an o,o'-biphenyldiyl dinickel complex with CO and dichloroalkanes lead to fluorene derivatives, indicating the formation of carbon-carbon bonds at a bimetallic moiety.
Trinuclear Nickel Complexes with Metal–Arene Interactions Supported by Tris- and Bis(phosphinoaryl)benzene Frameworks
作者:Sandy Suseno、Kyle T. Horak、Michael W. Day、Theodor Agapie
DOI:10.1021/om400976x
日期:2013.12.9
Triphosphine and diphosphine ligands with backbones designed to facilitate metal–arene interactions were employed to support multinuclear Ni complexes. Di- and trinuclear metal complexes supported by a triphosphinecontaining a triarylbenzene linker display diverse metal–arene binding modes. Multinuclear Ni halide complexes were isolated with strongly interacting metal centers bound to opposite faces
采用旨在促进金属-芳烃相互作用的主链的三膦和二膦配体来支撑多核镍配合物。由含有三芳基苯连接基的三膦支持的二核和三核金属配合物显示出多种金属-芳烃结合模式。多核镍卤化物络合物被分离出来,其强相互作用的金属中心与配位芳烃的相对面结合。在二碘化三镍配合物2与四羰基铁酸二钠反应时,分离出共面三角镍(0)配合物4 。 Ni 0 3簇基序还可以由对三联苯二膦支持,其中末端一氧化碳配体取代第三膦供体。所有多核配合物都具有强金属-芳烃相互作用,证明了芳烃作为小簇的多功能配体设计元素的用途。
Molybdenum Catalyzed Ammonia Borane Dehydrogenation: Oxidation State Specific Mechanisms
作者:Joshua A. Buss、Guy A. Edouard、Christine Cheng、Jade Shi、Theodor Agapie
DOI:10.1021/ja5059923
日期:2014.8.13
Though numerous catalysts for the dehydrogenation of ammonia borane (AB) are known, those that release >2 equiv of H2 are uncommon. Herein, we report the synthesis of Mo complexes supported by a para-terphenyl diphosphine ligand, 1, displaying metal–arene interactions. Both a Mo0 N2 complex, 5, and a MoII bis(acetonitrile) complex, 4, exhibit high levels of AB dehydrogenation, releasing over 2.0 equiv of
尽管已知有多种用于氨硼烷 (AB) 脱氢的催化剂,但释放 >2 当量 H2 的催化剂并不常见。在此,我们报道了由对三联苯二膦配体 1 支持的 Mo 配合物的合成,显示出金属-芳烃相互作用。Mo0 N2 络合物 5 和 MoII 双(乙腈)络合物 4 均表现出高水平的 AB 脱氢,释放超过 2.0 当量的 H2。反应速率、脱氢程度和反应机理随着催化剂前氧化态的变化而变化。对与 AB 化学相关的几种 Mo 氢化物(MoII(H)2、[MoII(H)]+ 和 [MoIV(H)3]+)进行了表征。
Arene non-innocence in dinuclear complexes of Fe, Co, and Ni supported by a para-terphenyl diphosphine
作者:Kyle T. Horak、Alexandra Velian、Michael W. Day、Theodor Agapie
DOI:10.1039/c4cc00838c
日期:——
Hapticity changes of a Fe2(μ-arene) moiety upon one-electron oxidation highlight the use of an arene as a non-innocent ligand.