A Boron-Fluorinated Tris(pyrazolyl)borate Ligand (<sup>F</sup>
Tp*) and Its Mono- and Dinuclear Copper Complexes [Cu(<sup>F</sup>
Tp*)<sub>2</sub>
] and [Cu<sub>2</sub>
(<sup>F</sup>
Tp*)<sub>2</sub>
]: Synthesis, Structures, and DFT Calculations
作者:Timo Augenstein、Franziska Dorner、Kevin Reiter、Hanna E. Wagner、Delphine Garnier、Wim Klopper、Frank Breher
DOI:10.1002/chem.201504545
日期:2016.6.1
Reaction of [Si(3,5‐Me2pz)4] (1) with [Cu(MeCN)4][BF4] (2) gave the mono‐ and dinuclear copper complexes [Cu2(FTp*)2] (3) and [Cu(FTp*)2] (4). Both complexes contain the so‐far unprecedented boron‐fluorinated FTp* ligand ([FB(3,5‐Me2pz)3]− with pz=pyrazolyl) originating from 1, acting as a pyrazolyl transfer reagent, and the [BF4]− counter anion of 2, serving as the source of the BF} entity. The solid‐state
[Si(3,5-Me 2 pz)4 ](1)与[Cu(MeCN)4 ] [BF 4 ](2)反应生成单核和双核铜络合物[Cu 2(F Tp *)2 ](3)和[Cu(F Tp *)2 ](4)。两种配合物均含有迄今为止从未有过的硼氟化的F Tp *配体([FB(3,5-Me 2 pz)3 ] -具有pz =吡唑基),其起源于1(用作吡唑基转移试剂)和[BF] 4 ] -2的抗衡阴离子,用作BF}实体的来源。阐述了配合物的固态结构以及NMR和EPR光谱特征。脉冲梯度自旋回波(PGSE)实验表明,3在苯中保留(几乎完全保留)其二聚体结构,而在乙腈中观察到二聚体裂解和乙腈加合物的形成,大概是[Cu(F Tp *)(MeCN)]。根据DFT计算,固态中Cu·⋅·Cu的短距离为269.16 pm,这是由复合物中所有原子之间的色散相互作用所决定的(Cu-Cu色散贡献本身很小)。循环伏安法研究显示3示