Two New Nitronyl Nitroxide Radicals and Their Complexes with M(hfac)2 [M=Co(II), Ni(II), Mn(II)]: Syntheses, Crystal Structures, and Magnetic Characterizations
Yan-Xin Yu
Beijing National Laboratory for Molecular Sciences and Organic Solids Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
Search for more papers by this authorHuai-Ming Hu
Department of Chemistry, Northwest University, Xi'an, Shaanxi 710069, China
Search for more papers by this authorZhi-Yong Wang
Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
Search for more papers by this authorDao-Ben Zhu
Search for more papers by this authorYan-Xin Yu
Beijing National Laboratory for Molecular Sciences and Organic Solids Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
Search for more papers by this authorHuai-Ming Hu
Department of Chemistry, Northwest University, Xi'an, Shaanxi 710069, China
Search for more papers by this authorZhi-Yong Wang
Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
Search for more papers by this authorDao-Ben Zhu
Search for more papers by this authorAbstract
Two new nitronyl nitroxides with amido units L1 and L2 were synthesized and characterized. Reactions of L1 and L2 with M(hfac)2 [hfachexafluoroacetylacetonate, MCo(II), Ni(II), Mn(II)] afforded five hetero-spin complexes L1Co(hfac)2, L1Ni(hfac)2, L2Co(hfac)2, L2Ni(hfac)2 and L2Mn(hfac)2. The crystal structures and magnetic characterizations of L1, L2 and their metal complexes LM(hfac)2 were described and discussed. Crystal structural analysis shows that both the carbonyl oxygen and the nitroxide oxygen are coordinated to the metal ions. Strong antiferromagetic coupling between the nitronyl nitroxides and metal ions were observed for all the five LM(hfac)2 complexes.
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