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Zhang, Ran,Ni, Zhong-Hai,Zhang, Li-Fang,Kou, Hui-Zhong Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.7
A new tetranuclear Mn(III) complex $[Mn^{III}{_4}(sae)_4({\mu}_3-O)({\mu}_{1,1}-N_3)(OH)(H_2O)_2]{\cdot}H_2O$ (1) ($H_2sae$ = 2-salicylideneamino-1-ethanol) has been synthesized by the reaction of $MnCl_2{\cdot}4H_2O$, $H_2sae$ and sodium azide in the mixed solvent of methanol, acetonitrile and water. The X-ray diffraction analysis shows that the four Mn(III) ions in complex 1 have a unique adamantine arrangement, whereas the coordination environment of each Mn(III) ions is different. Magnetic studies indicate that complex 1 manifests antiferromagnetic behaviors. The magnetic susceptibilities of complex 1 have been fitted by two magnetic models based on the suitable analysis of its magnetic structural topology.
Ran Zhang,Zhong-Hai Ni,Li-Fang Zhang,Hui-Zhong Kou 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.7
A new tetranuclear Mn(III) complex [MnIII 4(sae)4(μ3-O)(μ1,1-N3)(OH)(H2O)2]·H2O (1) (H2sae = 2-salicylideneamino- 1-ethanol) has been synthesized by the reaction of MnCl2·4H2O, H2sae and sodium azide in the mixed solvent of methanol, acetonitrile and water. The X-ray diffraction analysis shows that the four Mn(III) ions in complex 1 have a unique adamantine arrangement, whereas the coordination environment of each Mn(III) ions is different. Magnetic studies indicate that complex 1 manifests antiferromagnetic behaviors. The magnetic susceptibilities of complex 1 have been fitted by two magnetic models based on the suitable analysis of its magnetic structural topology.
Guo-Ling Li,Li-Fang Zhang,Zhong-Hai Ni,Hui-Zhong Kou,Ai-Li Cui 대한화학회 2012 Bulletin of the Korean Chemical Society Vol.33 No.5
Three new cyanide-bridged CrIIIMnII binuclear complexes, [Mn(phen)2Cl][Cr(bpmb)(CN)2]·H2O (1) (phen = 1,10-phenanthroline, bpmb2– = 1,2-bis(pyridine-2-carboxamido)-4-methyl-benzenate), [Mn(phen)2Cl][Cr(bpdmb)- (CN)2]·H2O (2) (bpdmb2– = 1,2-bis(pyridine-2-carboxamido)-4,5-dimethyl-benzenate), and [Mn(phen)2Cl]- [Cr(bpClb)(CN)2]·CH3OH·H2O (3) (bpClb2– = 1,2-bis(pyridine-2-carboxamido)-4-chloro-benzenate) were obtained based on Mn(phen)2Cl2 and a series of dicyanidechromate(III) building blocks. Single crystal X-ray diffraction analysis shows the structures of the three complexes are dimeric type with two different metal centers linked by a cyanide group from corresponding dicyanidechromate(III) building block. Magnetic investigations indicate the existence of relatively weak antiferromagnetic coupling between Cr(III) and Mn(II) ions with best-fit constants JCrMn = –2.78(5) cm–1 for 1, JCrMn = –3.02(2) cm–1 for 2 and JCrMn = –2.27(3) cm–1 for 3 based on the spin exchange Hamiltonian = –2JCrMn Cr Mn. The magneto-structural correlation of cyanide-bridged CrIIIMnII complexes has been discussed at last.
Li, Guo-Ling,Zhang, Li-Fang,Ni, Zhong-Hai,Kou, Hui-Zhong,Cui, Ai-Li Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.5
Three new cyanide-bridged $Cr^{III}Mn^{II}$ binuclear complexes, $[Mn(phen)_2Cl][Cr(bpmb)(CN)_2]{\cdot}H_2O$ ($\mathbf{1}$) (phen = 1,10-phenanthroline, $bpdmb^{2-}$ = 1,2-bis(pyridine-2-carboxamido)-4-methyl-benzenate), $[Mn(phen)_2Cl][Cr(bpmb)-(CN)_2]{\cdot}H_2O$ ($\mathbf{2}$) ($bpdmb^{2-}$ = 1,2-bis(pyridine-2-carboxamido)-4,5-dimethyl-benzenate), and $[Mn(phen)_2Cl]-[Cr(bpClb)(CN)_2]{\cdot}CH_3OH{\cdot}H_2O$ ($\mathbf{3}$) ($bpClb^{2-}$ = 1,2-bis(pyridine-2-carboxamido)-4-chloro-benzenate) were obtained based on $Mn(phen)_2Cl_2$ and a series of dicyanidechromate(III) building blocks. Single crystal X-ray diffraction analysis shows the structures of the three complexes are dimeric type with two different metal centers linked by a cyanide group from corresponding dicyanidechromate(III) building block. Magnetic investigations indicate the existence of relatively weak antiferromagnetic coupling between Cr(III) and Mn(II) ions with best-fit constants $J_{CrMn}=-2.78(5)cm^{-1}$ for $\mathbf{1}$, $J_{CrMn}=-3.02(2)cm^{-1}$ for $\mathbf{2}$ and $J_{CrMn}=-2.27(3)cm^{-1}$ for $\mathbf{3}$ based on the spin exchange Hamiltonian = $-2J_{CrMn}\hat{S}_{Cr}\hat{S}_{Mn}$. The magneto-structural correlation of cyanide-bridged $Cr^{III}Mn^{II}$ complexes has been discussed at last.