Synthesis, Structure, and Catalytic Applications for <i>ortho</i>- and <i>meta</i>-Carboranyl Based NBN Pincer-Pd Complexes
作者:Min Ying Tsang、Clara Viñas、Francesc Teixidor、José Giner Planas、Nerea Conde、Raul SanMartin、María Teresa Herrero、Esther Domínguez、Agustí Lledós、Pietro Vidossich、Duane Choquesillo-Lazarte
DOI:10.1021/ic5013999
日期:2014.9.2
o- and m-Carborane-based NBN pincer palladium complexes (oCB-L1)Pd, (oCB-L2)Pd, and (mCB-L1)Pd are synthesized in two steps from commercially available starting materials. The pincer complexes were prepared by the reaction of bis-[R(hydroxy)methyl]-1,2-dicarba-closo-dodecaborane (R = 2-pyridyl oCB-L1, 6-methyl-2-pyridyl oCB-L2) or bis-[2-pyridyl (hydroxy)methyl]-1,2-dicarba-meta-dodecaborane (mCB-L1)
ø -和米-Carborane基于NBN钳形钯络合物(Ô CB-L1)的Pd,(Ô CB-L2)的Pd,和(米CB-L1)的Pd在由市售的起始材料的两个步骤进行合成。钳配合物由双- [R(羟基)甲基] -1,2- dicarba-的反应制备闭合碳-dodecaborane(R = 2-吡啶基ö CB-L1,6-甲基-2-吡啶基ö CB-L2)或带有[PdCl 2(MeCN)2的双-[2-吡啶基(羟基)甲基] -1,2-二氨基-间十二烷基硼烷(m CB-L1)]在温和的条件下。所有碳硼烷钳形配合物的X射线结构测定清楚地表明了碳硼烷笼的B–H活化。结果与所有显示强σ电子给体的配合物中的Pd-B键一致。理论计算揭示了研究有机金属化学中的反式影响时考虑固态分子间氢键的重要性。局部轨道方法也已被用于分析碳硼烷基钳配合物中的金属氧化态。(o CB-L1)Pd和(m CB-L1)Pd的催化应用 已经表明