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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Synthesis and structural characterization of novel palladium complexes chelated by bulky cobalt-containing phosphine ligands: unusual palladium-cobalt bound formation
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Synthesis and structural characterization of novel palladium complexes chelated by bulky cobalt-containing phosphine ligands: unusual palladium-cobalt bound formation

机译：庞大的含钴膦配体螯合的新型钯配合物的合成与结构表征：不常见的钯钴结合形成

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The reaction of a bulky phosphine, [Co_2(CO)_5{μ-P,P-(μ-PPh_2C≡CPPh_2)}][Co_2(CO)_4{μ-P-(μ-PPh_2C≡CPPh_2)}] 1 with P(OMe)_3 gave a phosphite substituted tetracobalt-complex, [Co_2(CO)_4{P(OMe)_3} {μ-P,P-(μ-PPh_2C≡CPPh_2)}][Co_2(CO)_4{μ-P-(μ-PPh_2C≡CPPh_2)}] 5. Further reaction of 5 with (COD)PdCl_2 yielded a 5-coordinated palladium complex, [Co_2(CO)_4{P(OMe)_3}}{μ-P,P-(μ-PPh_2C≡CPPh_2)}][Co_2(CO)_3(μ-CO){μ-P-(μ-PPh_2C≡CPPh_2)}]PdCl_2 7. Similar results were obtained for the reaction of 1 with (COD)PdCl_2, with yielded [Co_2(CO)_5{μ-P,P-(μ-PPh_2C≡CPPh_2)}][Co_2(CO)_3{μ-P-(μ-PPh_2C≡CPPh_2)}]PdCl_2 6. Likewise, reaction of another bulky phosphine [(μ-Ph_2PCH_2PPh_2)Co_2(CO)_4(μ-PPh_2C≡CP(=O)Ph_2)] 3 with (COD)PdCl_2 yielded [{μ-P,P-PPh_2CH_2PPh_2}Co_2(CO)_3(μ-CO){μ-PPh_2C≡CP(=O)Ph_2}]PdCl_2 8. The X-ray structural studies of 6, 7 and 8 reveal that unusual palladium-cobalt bonds were formed. A Suzuki type reaction employing complexes 6, 7 and 8, as catalysts in the reaction of 2-bromothiophene with boronic acid did not show encouraging signs.
机译：庞大的膦[Co_2（CO）_5 {μ-P，P-（μ-PPh_2C≡CPPh_2）}] [Co_2（CO）_4 {μ-P-（μ-PPh_2C≡CPPh_2）}]的反应与P（OMe）_3结合，得到亚磷酸酯取代的四钴配合物，[Co_2（CO）_4 {P（OMe）_3} {μ-P，P-（μ-PPh_2C≡CPPh_2）}] [Co_2（CO）_4 { μ-P-（μ-PPh_2C≡CPPh_2）}] 5. 5与（COD）PdCl_2的进一步反应生成5位配位的钯络合物[Co_2（CO）_4 {P（OMe）_3}} {μ-P ，P-（μ-PPh_2C≡CPPh_2）}] [Co_2（CO）_3（μ-CO）{μ-P-（μ-PPh_2C≡CPPh_2）}] PdCl_2 7。 （COD）PdCl_2，生成了[Co_2（CO）_5 {μ-P，P-（μ-PPh_2C≡CPPh_2）}] [Co_2（CO）_3 {μ-P-（μ-PPh_2C≡CPPh_2）}] PdCl_2 6.同样，另一块庞大的膦[（μ-Ph_2PCH_2PPh_2）Co_2（CO）_4（μ-PPh_2C≡CP（= O）Ph_2）] 3与（COD）PdCl_2的反应产生[{μ-P，P-PPh_2CH_2PPh_2} Co_2（CO）_3（μ-CO）{μ-PPh_2C≡CP（= O）Ph_2}] PdCl_2 8.对6、7和8的X射线结构研究表明，形成了不寻常的钯-钴键。在2-溴噻吩与硼酸反应中使用络合物6、7和8作为催化剂的Suzuki型反应没有显示出令人鼓舞的迹象。

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