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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Room temperature transmetallation from tris (pentafluorophenyl) borane to cyclometallated iridium(III)
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Room temperature transmetallation from tris (pentafluorophenyl) borane to cyclometallated iridium(III)

机译：房间温度透射基于Tris（五氟苯苯基）硼烷至环荷载铱（III）

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摘要

Transmetallation reactions involving organoboron reagents and transition metals are legion in synthetic organometallic chemistry and homogeneous catalysis. Triarylboranes (BAr3) have been observed to participate in transmetallation reactions with many transition metals, typically following abstraction of an alkyl (R-) or hydride ligand by the Lewis acidic borane. Here, an unusual transmetallation strategy is described where an aryl group from a borane replaces a weakly coordinated PF6 -ligand. The precursors Ir(C<^> N)(2)(CNAr)(FPF5) (C<^> N = cyclometallating ligand, CNAr = aryl isocyanide) react smoothly with B(C6F5) 3 to give complexes of the type Ir(C<^> N)(2)(CNAr)(C6F5), a previously unobserved structure type featuring an unchelated aryl ligand. The reaction tolerates a variety of C<^> N ligands and a range of electronically and sterically varied aryl isocyanide ancillary ligands. A total of six complexes of this type are described, two of which are characterized by single-crystal X-ray diffraction. All but one of the complexes luminesces at room temperature, with the emission wavelength dependent on the C<^> N ligand.
机译：涉及有机硼试剂和过渡金属的透射化反应是合成有机金属化学和均匀催化的军团。已经观察到三芳烃（BAR3）参与具有许多过渡金属的透射基反应，通常按照Lewis酸性硼烷的烷基（R-）或氢化物配体进行抽象。这里，描述了异常的透射基序策略，其中来自硼烷的芳基取代弱协调的PF6 -Ligand。前体IR（C + N）（2）（CNAR）（CNAR）（FPF5）（C + N =环管酸酯配体，CNAR =芳基异氰化物）用B（C6F5）3平滑地反应，得到IR型络合物（ C <^> N）（2）（CNAR）（C6F5），以前的未接受的结构型，具有未呈现的芳基配体。该反应耐受各种C + N配体和一系列电子和空间变化的芳基异氰酸酯辅助配体。描述了这种类型的总共六个复合物，其中两个是单晶X射线衍射的特征。除了室温之外，其中一个复合物在室温下发光，依赖于C <^> n配体的发射波长。

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