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首页> 外文期刊>Chemistry: A European journal >Synthesis, coordination behavior, and reduction chemistry of cymantrenyl-1,3-bis(2,3,4,5-tetraphenyl)borole
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Synthesis, coordination behavior, and reduction chemistry of cymantrenyl-1,3-bis(2,3,4,5-tetraphenyl)borole

机译：cymantrenyl-1,3-双（2,3,4,5-四苯基）硼烷的合成，配位行为和还原化学

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摘要

We describe the synthesis of base-free bisborole [Cym(BC _4Ph _4) _2]-Cym=(OC) _3Mn(?· 5- C ~5H _3)-and its transformation into two fully characterized Lewis acid-base adducts with pyridine bases of the type 4-R-NC _5H _4 (R=tBu, NMe _2). The results of electrochemical, as well as NMR and UV/Vis spectroscopic studies on [Cym(BC _4Ph _4) _2] and the related monoborole derivative [Cym(BC _4Ph _4)]-Cym=(OC) _3Mn(?· ~5- C _5H _4)-provided conclusive evidence for 1) the enhanced Lewis acidity of the two boron centers that result from conjugation of two borole fragments, and 2) the fact that Mn-B bonding interactions between the Lewis acidic borole moieties and the Mn center are considerably less pronounced for bisborole [Cym(BC _4Ph _4) _2]. In addition, the reduction chemistry of [Cym(BC _4Ph _4) _2] has been studied in detail, both electrochemically and chemically. Accordingly, chemical reduction of [Cym(BC _4Ph _4) _2] with magnesium anthracene afforded the corresponding tetraanion, which features a rare Mg-OC bonding mode in the solid state. Rare bonding mode: The synthesis of a cymantrene-based bisborole and its coordination and reduction chemistry are described (see figure). Electrochemical and chemical reduction by Mg anthracene afforded the corresponding tetraanion, which features a rare Mg-OC bonding mode in the solid state.
机译：我们描述了无碱双硼烷[Cym（BC _4Ph _4）_2] -Cym =（OC）_3Mn（？5-C〜5H _3）的合成及其转化为两个具有吡啶的完全表征的路易斯酸碱加合物的方法基本类型4-R-NC _5H _4（R = tBu，NMe _2）。 [Cym（BC _4Ph _4）_2]和相关单硼衍生物[Cym（BC _4Ph _4）]-Cym =（OC）_3Mn（？〜〜5）的电化学，NMR和UV / Vis光谱研究结果-C _5H _4）提供的确凿证据如下：1）两个硼原子片段的结合导致两个硼中心的路易斯酸度提高，以及2）Lewis酸性硼原子部分与Mn之间的Mn-B键相互作用双波[Cym（BC _4Ph _4）_2]的中心明显不那么明显。另外，已经对[Cym（BC _4Ph _4）_2]的还原化学进行了电化学和化学研究。因此，用蒽镁化学还原[Cym（BC _4Ph _4）_2]得到相应的四阴离子，其在固态状态下具有罕见的Mg-OC键模式。稀有键合模式：描述了基于cymantrene的双硼烷的合成及其配位和还原化学反应（见图）。用蒽镁进行电化学和化学还原得到相应的四阴离子，其在固态下具有罕见的Mg-OC键模式。

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