...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemistry: A European journal >Coordination algorithms control molecular architecture: [Cu-4(I)(L2)(4)](4+) grid complex versus [M-2(II)(L2)(2)X-4](y+) side-by-side complexes (M = Mn, Co, Ni, Zn; X = solvent or anion) and [Fe-II(L2)(3)][(Cl3FeOFeCl3)-O-III-Cl-III]
【24h】

Coordination algorithms control molecular architecture: [Cu-4(I)(L2)(4)](4+) grid complex versus [M-2(II)(L2)(2)X-4](y+) side-by-side complexes (M = Mn, Co, Ni, Zn; X = solvent or anion) and [Fe-II(L2)(3)][(Cl3FeOFeCl3)-O-III-Cl-III]

机译：协调算法控制分子结构：[Cu-4（I）（L2）（4）]（4+）网格络合物与[M-2（II）（L2）（2）X-4]（y +）并排侧配合物（M = Mn，Co，Ni，Zn; X =溶剂或阴离子）和[Fe-II（L2）（3）] [（Cl3FeOFeCl3）-O-III-Cl-III]

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The synthesis and characterisation of a pyridazine-containing two-armed grid ligand L2 (prepared from one equivalent of 3,6-diformylpyridazine and two equivalents of p-anisidine) and the resulting transition metal (Zn, Cu, Ni, Co, Fe, Mn) complexes (1-9) are reported. Single-crystal X-ray structure determinations revealed that the copper(I) complex had self-assembled as a [2 x 2] grid, [Cu-4(1)(L2)(4)][PF6](4)CH3CN)(H2O)(CH3CH2OCH3CH3)(0.25) (2 . (CH3CN)(H2O)(CH3CH2OCH2-CH3)(0.25)), whereas the [Zn-2(L2)(2)(CH3CN)(2)(H2O)(2)][ClO4](4).CH3CN(1 . CH3CN), [Ni-2(II)(L2)(2)(CH3CN)(4)][BF4](4) . (CH3CH2OCH2CH3)(0.25) (5a.(CH3CH2OCH2-CH3)(0.25)) and [Co-2(II)(L2)(2)(H2O)(2)- (CH3CN)(2)][ClO4](4) . (H2O)(CH3CN)(0.5) (6a . (H2O) (CH3CN)(0.5)) complexes adopt a side-by-side architecture; iron(II) forms a monometallic cation binding three L2 ligands, [Fe-II(L2)(3)]- [Fe-III Cl3OCl3FeIII].CH3CN (7.CH3CN). A more soluble salt of the cation of 7, the diamagnetic complex [Fe-II(L2)(3)][BF4](2).2H(2)O (8), was prepared, as well as two derivatives of 2, [CU21(L2)(2)(NCS)(2)] . H2O (3) and [Cu-2(1)(L2)(NCS)(2)] (4). The manganese complex, [Mn-2(II)(L2)(2)Cl-4].3H(2)O (9), was not structurally characterised, but is proposed to adopt a side-by-side architecture. Variable temperature magnetic susceptibility studies yielded small negative J values for the side-by-side complexes: J= -21.6 cm(-1) and g = 2.17 for S=1 dinickel(II) complex [Ni-2(II)(L2)(2)(H2O)(4)][BF4](4) (5b) (fraction monomer 0.02); J = - 7.6 cm(-1) and g = 2.44 for S=3/2 dicobalt(II) complex [CO2II(L2)(2)(H2O)(4)][ClO4](4) (6b) (fraction monomer 0.02); J = - 3.2 cm(-1) and g = 1.95 for S = 5/2 dimanganese(II) complex 9 (fraction monomer 0.02). The double salt, mixed valent iron complex 7. H2O gave J = - 75 cm(-1) and g = 1.81 for the S=5/2 diiron(III) anion (fraction monomer = 0.025). These parameters are lower than normal for Fel(III)OFe(III) species because of fitting of superimposed monomer and dimer susceptibilities arising from trace impurities. The iron(II) centre in 7 - H2O is low spin and hence diamagnetic, a fact confirmed by the preparation and characterisation of the simple diamagnetic iron(II) complex 8. Mossbauer measurements at 77 K confirmed that there are two iron sites in 7. H2O, a low-spin iron(II) site and a high-spin diiron(III) site. A full electrochemical investigation was undertaken for complexes 1, 2, 5 b, 6 b and 8 and this showed that multiple redox processes are a feature of all of them. [References: 84]
机译：含哒嗪的两臂网格配体L2（由一当量的3,6-二甲酰基哒嗪和两当量的对茴香脑制备）和所得过渡金属（Zn，Cu，Ni，Co，Fe，报道了Mn）配合物（1-9）。单晶X射线结构测定表明，铜（I）配合物已自组装为[2 x 2]网格[Cu-4（1）（L2）（4）] [PF6]（4）CH3CN ）（H2O）（CH3CH2OCH3CH3）（0.25）（2.（CH3CN）（H2O）（CH3CH2OCH2-CH3）（0.25）），而[Zn-2（L2）（2）（CH3CN）（2）（H2O） （2）] [ClO4]（4）.CH3CN（1。CH3CN），[Ni-2（II）（L2）（2）（CH3CN）（4）] [BF4]（4）。 （CH3CH2OCH2CH3）（0.25）（5a。（CH3CH2OCH2-CH3）（0.25））和[Co-2（II）（L2）（2）（H2O）（2）-（CH3CN）（2）] [ClO4]（ 4）。 （H2O）（CH3CN）（0.5）（6a。（H2O）（CH3CN）（0.5））络合物采用并排结构;铁（II）形成结合三个L2配体[Fe-II（L2）（3）]-[Fe-III Cl3OCl3FeIII] .CH3CN（7.CH3CN）的单金属阳离子。制备了7的阳离子的可溶性盐，抗磁性配合物[Fe-II（L2）（3）] [BF4]（2）.2H（2）O（8），以及2的两个衍生物，[CU21（L2）（2）（NCS）（2）]。 H2O（3）和[Cu-2（1）（L2）（NCS）（2）]（4）。锰络合物[Mn-2（II）（L2）（2）Cl-4] .3H（2）O（9）的结构特征不明确，但建议采用并行结构。可变温度磁化率研究得出并排配合物的负J值较小：对于S = 1双镍（II）配合物[Ni-2（II）（L2），J = -21.6 cm（-1）和g = 2.17 ）（2）（H2O）（4）] [BF4]（4）（5b）（馏分单体0.02）;对于S = 3/2二钴（II）络合物[CO2II（L2）（2）（H2O）（4）] [ClO4]（4）（6b），J =-7.6 cm（-1）和g = 2.44单体0.02）;对于S = 5/2二锰（II）配合物9（馏分单体0.02），J =-3.2 cm（-1），g = 1.95。双盐混合价铁络合物7。对于S = 5/2的二铁（III）阴离子，H2O给出J =-75 cm（-1），g = 1.81（馏分单体= 0.025）。这些参数低于Fel（III）OFe（III）物种的正常参数，因为重叠单体的拟合和痕量杂质引起的二聚体敏感性。 7-H2O中的铁（II）中心自旋低，因此具有抗磁性，这一事实已通过简单的抗磁性铁（II）配合物8的制备和表征得到证实。Mossbauer在77 K的测量结果证实7中存在两个铁位点H2O，一个低旋铁（II）位和一个高旋铁（III）位。对配合物1、2、5b，6b和8进行了全面的电化学研究，结果表明多个氧化还原过程是所有配合物的特征。 [参考：84]

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号