Two helical one-dimensional complexes [Mnn（MeOH）4][MnlV（L）2]·2MeOH （1） and [Mnm（salen）][Mnm（L）2] （2） （H2L = HON=C（Ph）N=NC6HaCO2H） contain the noninnocent ligand [Mn（L）2]2- and innocent low-spin ...Two helical one-dimensional complexes [Mnn（MeOH）4][MnlV（L）2]·2MeOH （1） and [Mnm（salen）][Mnm（L）2] （2） （H2L = HON=C（Ph）N=NC6HaCO2H） contain the noninnocent ligand [Mn（L）2]2- and innocent low-spin [Mn（L）2]-. Intrachain anti- ferromagnetic interaction between adjacent manganese syn-anti and anti-anti carboxylate bridges have been high-spin and low-spin Mn（llI） ions in complex 2. ions via the syn-anti carboxylate bridges in complex 1. Alternate found to transmit ferro- and antiferromagnetic coupling between展开更多
A new method for the synthesis of azo Schiff an base ligand in which the azo and azomethine groups are coordination sites was developed through a Schiff base precursor. The precursor, N-4-methoxybenzylidene-3-hydroxyp...A new method for the synthesis of azo Schiff an base ligand in which the azo and azomethine groups are coordination sites was developed through a Schiff base precursor. The precursor, N-4-methoxybenzylidene-3-hydroxyphenylamine （SB） derived from 3-aminophenol was regioselectively coupled with a diazonium ion para to the hydroxyl group of the amine component of the Schiff base. The para selectivity was controlled by the directing effect of the hydroxyl group. The ligand and its nickel（Ⅱ） complex were characterized by elemental analyses, IR and UV-Vis spectroscopy. The analytical and spectral data supported the mononuclear formulation of the complex with metal to ligand ratio （M ： L = 1 ： 2） and suggested a square planar geometry for the complex.展开更多
Two helical one-dimensional complexes [MnII(MeOH)4][MnIV(L·)2]·2MeOH (1) and [MnⅢ(salen)][MnⅢ(L)2] (2) (H2L = HON=C(Ph)N=NC_(6)H_(4)CO_(2)H) contain the noninnocent ligand [Mn(L·)2]2- and innocent low...Two helical one-dimensional complexes [MnII(MeOH)4][MnIV(L·)2]·2MeOH (1) and [MnⅢ(salen)][MnⅢ(L)2] (2) (H2L = HON=C(Ph)N=NC_(6)H_(4)CO_(2)H) contain the noninnocent ligand [Mn(L·)2]2- and innocent low-spin [Mn(L)2]-. Intrachain antiferromagnetic interaction between adjacent manganese ions via the syn-anti carboxylate bridges in complex 1. Alternate syn-anti and anti-anti carboxylate bridges have been found to transmit ferro-and antiferromagnetic coupling between high-spin and low-spin Mn(Ⅲ) ions in complex 2.展开更多
基金supported by the National Natural Science Foundation of China (21171103, 20921001)
文摘Two helical one-dimensional complexes [Mnn（MeOH）4][MnlV（L）2]·2MeOH （1） and [Mnm（salen）][Mnm（L）2] （2） （H2L = HON=C（Ph）N=NC6HaCO2H） contain the noninnocent ligand [Mn（L）2]2- and innocent low-spin [Mn（L）2]-. Intrachain anti- ferromagnetic interaction between adjacent manganese syn-anti and anti-anti carboxylate bridges have been high-spin and low-spin Mn（llI） ions in complex 2. ions via the syn-anti carboxylate bridges in complex 1. Alternate found to transmit ferro- and antiferromagnetic coupling between
文摘A new method for the synthesis of azo Schiff an base ligand in which the azo and azomethine groups are coordination sites was developed through a Schiff base precursor. The precursor, N-4-methoxybenzylidene-3-hydroxyphenylamine （SB） derived from 3-aminophenol was regioselectively coupled with a diazonium ion para to the hydroxyl group of the amine component of the Schiff base. The para selectivity was controlled by the directing effect of the hydroxyl group. The ligand and its nickel（Ⅱ） complex were characterized by elemental analyses, IR and UV-Vis spectroscopy. The analytical and spectral data supported the mononuclear formulation of the complex with metal to ligand ratio （M ： L = 1 ： 2） and suggested a square planar geometry for the complex.
文摘Two helical one-dimensional complexes [MnII(MeOH)4][MnIV(L·)2]·2MeOH (1) and [MnⅢ(salen)][MnⅢ(L)2] (2) (H2L = HON=C(Ph)N=NC_(6)H_(4)CO_(2)H) contain the noninnocent ligand [Mn(L·)2]2- and innocent low-spin [Mn(L)2]-. Intrachain antiferromagnetic interaction between adjacent manganese ions via the syn-anti carboxylate bridges in complex 1. Alternate syn-anti and anti-anti carboxylate bridges have been found to transmit ferro-and antiferromagnetic coupling between high-spin and low-spin Mn(Ⅲ) ions in complex 2.
