From chromium-chromium quintuple bonds to molecular squares and porous coordination polymers.
From chromium-chromium quintuple bonds to molecular squares and porous coordination polymers.
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从铬-铬五重键到分子方阵和多孔配位聚合物
DOI:
10.1021/ic501400n
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发表时间:
2014
影响因子:
4.6
通讯作者:
Heinemann
中科院分区:
文献类型:
--
作者:
Oelkers;Demeshko;Heinemann
Reaction of the quintuply bonded chromium(I) dimer [ApCrCrAp] (Ap = sterically demanding 2-aminopyridinate) with pyrazine yields a chromium(II) complex with a η4:η4face-on coordinated pyrazine dianion. Reaction with 4,4′-bipyridine, on the other hand, completely cleaves the metal–metal bond, leading to a chromium(II)-based molecular square. XRD and magnetic measurements show ligand radical anions and a ferrimagnetic alignment of alternating metal and ligand magnetic moments. Controlled polymerization of the molecular square with pyrazine yields a porous coordination polymer featuring both reduced and nonreduced linkers.
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