Synthesis of Functionalizable Boron-Containing π-Electron Materials that Incorporate Formally Aromatic Fused Borepin Rings
作者:Anthony Caruso、Maxime A. Siegler、John D. Tovar
DOI:10.1002/anie.201000411
日期:——
extended π‐electron molecules contain bulky substituents that shield the vacant boron p orbitals and allow synthetic manipulation and purification under ambient conditions. These borepin‐containing compounds (see picture; Mes*=1,3,5‐tris(tert‐butyl)phenyl; B orange, C gray) display reversible cathodic electrochemistry and can be viewed as n‐type analogues to bent acene hydrocarbons.
不是一个整洁的乙 OH:基于Borepin扩展的π电子的分子包含屏蔽空置硼的p轨道,并允许合成操作和纯化在环境条件下大体积取代基。这些含硼钉的化合物(见图; Mes * = 1,3,5-三(叔丁基)苯基; B橙色,C灰色)显示可逆的阴极电化学,可被视为弯曲并苯烃的n型类似物。
2-diyl-bridged A-frame complexes [Pt2X2(μ-1,2-B2(NMe2)2)(μ-dmpm)2]. X-ray crystallographic studies of these (BY)n-bridged complexes show structural trends depending on the steric demands of Y and the nature of X. Analysis of higher-order 31P NMR satellites provided information on JP–Pt and JPt–Pt coupling constants, the latter correlating with the Pt⋯Pt distance. All (di)boranediyl complexes also proved unstable
一系列硼烷二基桥接的二铂A框架络合物[PT 2 X 2(μ-BY)(μ-DMPm)2 ](X = Cl,Br,I; Y =芳基,烷基,氨基,卤素; DMPm =双(二甲基膦基)甲烷)是通过将BX 2 Y二次氧化加成到[PT 2(nbe)2(μ-DMPm)2 ](nbe =降冰片烯)或桨轮络合物[PT 2(μ-DMPm)中而合成的)3 ]。类似地,将B 2 X 2(NMe 2)2(X = Cl,Br)添加到[PT 2(nbe)2(μ-DMPm)2]提供访问乙硼烷-1,2-二基桥连的A-帧络合物[PT 2 X 2(μ-1,2--B 2(NME 2)2)(μ-DMPM)2 ]。这些(BY)n桥联配合物的X射线晶体学研究表明,结构趋势取决于Y的空间需求和X的性质。对高阶31 P NMR卫星的分析提供了有关J P–PT和J PT–的信息。 PT耦合常数,后者与PT⋯PT距离相关。还证明所有(二)硼烷二基配合物对桥接成功的“
What hides within: Three different singlet boryl phosphinidenes were synthesized by using cAAC carbene, and their inverselypolarizedphosphaalkene characteristics were investigated. Quantum mechanical studies suggest that the P center of these boryl phosphinidenes contains two lone pairs viz., an σ-type lone pair and a “hidden” π-type lone pair.
隐藏内容:使用 cAAC 卡宾合成了三种不同的单线态硼基膦亚膦,并研究了它们的反向极化磷烯特性。量子力学研究表明,这些硼基膦亚膦的 P 中心包含两个孤电子对,即一个 σ 型孤对电子和一个“隐藏”的 π 型孤电子对。