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Chiral cyanide-bridged 1D Fe~Ⅲ-Mn~Ⅲ heterobimetallic chains: Synthesis, structures and magnetic properties
基金项目:financially supported by the Major State Basic Research Development Program (2011CB808704);the National Natural Science Foundation of China (91022031)
摘    要:Two couples of enantiomerically pure chiral cyano-bridged heterobimetallic one-dimensional (1D) chain complexes: Mn((R,R)-Salphen)Fe(Tp)(CN)3]n (1) and Mn((S,S)-Salphen)Te(Tp)(CN)3]n (2) (Salphen = N,N’-1,2-diphenylethylenebis (salicylideneiminato) dianion, Tp = tris(pyrazolyl) hydroborate), Mn((R,R)-Salphen)Fe(Tp*)(CN)3·2H2O]n (3) and Mn((S,S)-Salphen)Fe(Tp*)(CN)3·2H2O]n (4) (Tp* = hydridotris (3,5-dimethylpyrazol-1-yl) borate), have been successfully synthesized by the reactions of MnIII schiff-base complexes with the tricyanometalate building block, (LTp)Fe(CN)3]- (LTp = Tp or Tp*). All complexes are made up of neutral cyano-bridged zigzag double chains with (-Fe-C≡N-Mn-N≡C-)n as the repeating unit. Circular dichroism (CD) spectra confirm the enantiomeric nature of the optically active complexes. Magnetic studies demonstrate that ferromagnetic interactions are operative in these complexes. The ferromagnetic couplings become weak in the chains with the bending of the Mn-N≡C angles.

关 键 词:chiral  complexes  cyanide  ligands  chain  compounds  crystal  structures  magnetic  properties

Chiral cyanide-bridged 1D FeIII-MnIII heterobimetallic chains: Synthesis, structures and magnetic properties
Authors:MinXia Yao  Qi Zheng  Feng Gao  YiZhi Li  JingLin Zuo
Institution:1. State Key Laboratory of Coordination Chemistry; School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing, 210093, China
Abstract:Two couples of enantiomerically pure chiral cyano-bridged heterobimetallic one-dimensional (1D) chain complexes: Mn((R,R)-Salphen)Fe(Tp)(CN)3] n (1) and Mn((S,S)-Salphen)Te(Tp)(CN)3] n (2) (Salphen = N,N??-1,2-diphenylethylenebis (salicylideneiminato) dianion, Tp = tris(pyrazolyl) hydroborate), Mn((R,R)-Salphen)Fe(Tp*)(CN)3·2H2O] n (3) and Mn((S,S)-Salphen)Fe(Tp*)(CN)3·2H2O] n (4) (Tp* = hydridotris (3,5-dimethylpyrazol-1-yl) borate), have been successfully synthesized by the reactions of MnIII schiff-base complexes with the tricyanometalate building block, (LTp)Fe(CN)3]? (LTp = Tp or Tp*). All complexes are made up of neutral cyano-bridged zigzag double chains with (-Fe-C??N-Mn-N??C-) n as the repeating unit. Circular dichroism (CD) spectra confirm the enantiomeric nature of the optically active complexes. Magnetic studies demonstrate that ferromagnetic interactions are operative in these complexes. The ferromagnetic couplings become weak in the chains with the bending of the Mn-N??C angles.
Keywords:chiral complexes  cyanide ligands  chain compounds  crystal structures  magnetic properties
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