Two double end-on cyanato-bridged dinuclear manganese(II) complexes exhibiting abnormal magnetic coupling for the Mn(II)–N–Mn(II) linkage

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• 作者：Daisheng Yang ; Zhaoming Zhang ; Lifang Zhang ; Zhonghai Ni…
• 刊名：Transition Metal Chemistry
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：40
• 期：7
• 页码：749-754
• 全文大小：557 KB
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• 作者单位：Daisheng Yang (1)
  Zhaoming Zhang (1)
  Lifang Zhang (1)
  Zhonghai Ni (1)
  Wenfeng Wang (2)
  
  1. School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, People’s Republic of China
  2. School of Resources and Geosciences, China University of Mining and Technology, Xuzhou, 221116, People’s Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Catalysis
  Physical Chemistry
  Inorganic Chemistry
  
• 出版者：Springer Netherlands
• ISSN：1572-901X

文摘

Two cyanato-bridged dinuclear Mn(II) complexes [Mn₂(phen)₄(μ _1,1-NCO)₂][MIII(bpb)(CN)₂]·H₂O [M = Fe (1) or Co (2)], [phen = 1,10-phenanthroline, bpb2?/sup> = 1,2-bis(pyridine-2-carboxamido)benzenate] have been synthesized using the synthetic strategy of big anion inducement. Single-crystal X-ray diffraction analysis reveals that both complexes consist of a double end-on (EO) cyanato-bridged dinuclear Mn(II) unit and two free [M(bpb)(CN)₂]?/sup> building blocks acting as counter-ions. Magnetic studies show the presence of abnormal antiferromagnetic interactions between the two Mn(II) centers through the EO cyanate bridge with J = ?.58(3) cm? for complex 1 and ?.82(2) cm? for complex 2. The unusual antiferromagnetic interactions of these complexes can be attributed to their small Mn(II)–N–Mn(II) angles.