Cobalt-Magnesium and Iron-Magnesium Complexes with Weakened Dinitrogen Bridges
Cobalt-Magnesium and Iron-Magnesium Complexes with Weakened Dinitrogen Bridges
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DOI：
10.1002/ejic.201300187
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发表时间：
2013-08-06
影响因子：
2.3
通讯作者：
Holland, Patrick L.
中科院分区：
文献类型：
--
作者：
Dugan, Thomas R.;MacLeod, K. Cory;Holland, Patrick L.
后期过渡金属与主族金属协同结合N-2是一种很有前景的N-N键弱化和活化策略。我们报道了使用活化的Rieke镁来还原由大体积二酮配体支撑的铁和钴的络合物。红外光谱分析表明，N-2的结合伴随着线状M-NN-Mg-NN-M(M=Co，Fe)核的组装，N-N键减弱。由于镁-四氢呋喃(THF)的结合，钴和铁的络合物都需要四氢呋喃(THF)溶剂。钴的络合物可以分离为纯固体，而铁的络合物只在溶液中稳定。这些结果证明了异质双金属N-2络合物的结合方式与N-N弱化之间的关系。
The cooperative binding of N-2 by late transition and main-group metals is a promising strategy for N-N bond weakening and activation. We report the use of activated Rieke magnesium for the reduction of iron and cobalt complexes supported by bulky -diketiminate ligands. The binding of N-2 is accompanied by the assembly of a linear M-NN-Mg-NN-M (M = Co, Fe) core with weakened N-N bonds, as judged by infrared spectroscopy. Both the cobalt and iron complexes require tetrahydrofuran (THF) solvent, because of Mg-THF binding. The cobalt complex can be isolated as a pure solid, but the iron complex is stable only in solution. These results demonstrate the correlation between the binding mode and N-N weakening in heterobimetallic N-2 complexes.