μ-syn-η3:η3-C6H4 structure due to significant d-π* Ni(I)-to-ligand charge transfer. Delocalisation indices δ(Ni–Ni) derived from DFT calculations provide a metric to assess the strength of electronic coupling of the Ni sites based on solid state structural data, and indicated less strong electronic coupling for the bis-allyl like structure with δ(Ni–Ni) = 0.225 as compared to 0.548 for the Ni2(μ-S)2 structural
Ni(I)的双核络合物已经由4-叔苯基二硫代苯酚配体制备。发现立体效应决定了配位异构体结构的形成,这些配体在金属与配体键合的性质上有所不同。在镍位点上空间需求的膦配体PR 3,R = C 6 H 6,C 6 H 11的配位导致蝴蝶形的硫醇盐桥连的Ni 2(μ-S)2基序。对于较小的PME 3,4-三联苯骨架的中心的π系统采用双-烯丙基等μ-顺式-η 3:η 3 -C 6 ħ 4由于显着的d-π* Ni(I)到配体的电荷转移而导致的结构。由DFT计算得出的离域指数δ(Ni-Ni)提供了一种基于固态结构数据评估Ni位电子耦合强度的度量标准,并表明具有δ(Ni -Ni)= 0.225,而Ni 2(μ-S)2结构基元为0.548 。对作为辅助配体的CNCH 3的定性反应性研究为所提出的双金属配合物的化学性质提供了第一见解。
Regioselectively <i>N</i>-Methylated Azacalix[8]arene Octamethyl Ether Prepared by Catalytic Aryl Amination Reaction Using a Temporal <i>N</i>-Silylation Protocol
by spontaneous cleavage of the N-Si bond in the usual workup process, to furnish secondary aromatic amines as the cross-coupled product with no silyl group on the nitrogen atom. A successful application to the preparation of regioselectively N-methylated azacalix[8]arene is described, together with the crystallographic analysis.
Disclosed are methods for making 1,3- and 1,4-diamino-phenyl intermediates by utilizing bis-amination of ortho-substituted aryl halides.
本发明揭示了一种利用对位取代芳基卤代物的双胺化制备1,3-和1,4-二氨基苯中间体的方法。
Azacalix[4]arene cation radicals: spin-delocalised doublet- and triplet-ground states observed in the macrocyclic m-phenylene system connected with nitrogen atoms
Electron paramagnetic resonance spectroscopy has unmasked for the first time the spin-delocalised doublet- and triplet-ground states of azacalix[4]arene cation radicals.
电子顺磁共振波谱首次揭示了氮杂花[4]芳烃阳离子自由基的自旋离域双重态和三重态基态。
Exhaustively Methylated Azacalix[4]arene: Preparation, Conformation, and Crystal Structure with Exclusively CH/π-Controlled Crystal Architecture
[structure: see text]. Described are the preparation, conformation, and crystalstructure of exhaustively methylated azacalix[4]arene involving nitrogen atoms as bridging units. NMR and X-ray crystallographic analysis have demonstrated that this novel azacalix[4]arene adopts a 1,3-alternate conformation both in solution and in the solid state. The crystalstructure has been characterized solely by