The dual role of Para-phenyl substituents in aromatic imine ligand complexes of manganese and chromium
作者:Michael C. Hughes、Daniel J. Macero、Joseph M. Rao
DOI:10.1016/s0020-1693(00)90491-2
日期:1981.1
bis(terosite)chromium(III) complex shows four one-electron reductions to the +2, +2, 0, and −1 formal oxidation states, respectively. Comparison of half-wave potentials is made on the corresponding complexes of manganese and chromium with the ligands: 2,6-bis-(2pyridyl)pyridine(terpyridine)and 2,6-bis(2-pyridyl)-4-phenylpyridine (terosine). Redox potentials and comparisons of behaviour are also presented
摘要研究了锰(II)和铬(III)与配体2,6-双(4-苯基-2-吡啶基)-4-苯基-吡啶(异位)的双配合物的伏安行为。直流和交流极谱法和循环伏安法。锰(II)配合物分别经历两次单电子还原至+1和零形式氧化态,以及定义不明确的单电子氧化至+3形式氧化态。双(三方位)铬(III)配合物分别显示出四个单电子还原形式,分别为+ 2,+ 2、0和-1形式氧化态。比较了相应的锰和铬与以下配体的半波电势:2,6-双-(2-吡啶基)吡啶(三吡啶)和2,6-双(2-吡啶基)-4-苯基吡啶(四氢嘧啶) )。还提出了具有上述三个配体的钴和铁配合物的氧化还原电势和行为比较。所有比较表明对苯基取代基能够稳定配合物的高和低形式氧化态。还给出了光谱和磁数据。