Divergent behavior of palladium(II) and platinum(II) in the metalation of 1,3-di(2-pyridyl)benzene
Divergent behavior of palladium(II) and platinum(II) in the metalation of 1,3-di(2-pyridyl)benzene
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DOI：
10.1021/om990125g
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发表时间：
1999-08-16
期刊：
影响因子：
2.8
通讯作者：
de Arellano, MCR
中科院分区：
文献类型：
--
作者：
Cárdenas, DJ;Echavarren, AM;de Arellano, MCR
1，3-二（2-吡啶基）苯与Pd（OAc）（2）在中心芳环上发生区域选择性邻位取代反应，生成二聚体配合物，其中四个乙酸酯单元作为两个双金属化配体之间的桥，每个吡啶配体与不同的金属原子配位。与含氯化物的Pd（II）配合物的反应不导致C-H活化，而是导致没有Pd-C键的配位配合物。1，3-二-（2-吡啶基）苯的环铂化发生在苯环的C-2处，产生三齿配体。这种行为是相同的，先前观察到的Ru和Os。这两个orthophosphated配合物已通过X-射线衍射的结构特征。
1,3-Di(2-pyridyl)benzene undergoes regioselective orthometalation with Pd(OAc)(2) on the central ai yl ring, giving rise to a dimeric complex in which four acetate units act as bridges between two doubly metalated ligands and each pyridine ligand coordinates to a different metal atom. The reaction with chloride-containing Pd(II) complexes does not lead to C-H activation but to coordination complexes without Pd-C bonds. Cycloplatination of 1,3-di-(2-pyridyl)benzene takes place at C-2 of the benzene ring, generating a terdentate ligand. This behavior is the same as that previously observed for Ru and Os. Both orthometalated complexes have been structurally characterized by X-ray diffraction.