N-benzoylated 1,4,8,11-tetraazacyclotetradecane and their copper(II) and nickel(II) complexes: Spectral, magnetic, electrochemical, crystal structure, catalytic and antimicrobial studies
作者:G. Nirmala、A. Kalilur Rahiman、S. Sreedaran、R. Jegadeesh、N. Raaman、V. Narayanan
DOI:10.1016/j.saa.2010.04.031
日期:2010.9
ESR spectra of the mononuclear copper(II) complexes show four lines, characteristic of square-planar geometry with nuclear hyperfine spin 3/2. All copper(II) complexes show a normal room temperature magnetic moment values μeff 1.70–1.73 BM which is close to the spin-only value of 1.73 BM. Kinetic studies on the oxidation of pyrocatechol to o-quinone using the copper(II) complexes as catalysts and hydrolysis
一系列包含三个不同苯甲酰基1,4,8,11-四-(苯甲酰基)-1,4,8,11-四氮杂环十四烷(L 1),1,4,8,11-四的N-苯甲酰化的环酰胺配体-(2-硝基苯甲酰基)-1,4,8,11-四氮杂环十四烷(L 2)和1,4,8,11-四-(4-硝基苯甲酰基)-1,4,8,11-四氮杂环十四烷(L 3)以及它们的镍(II)和铜(II)配合物。还报道了L 1的晶体结构。通过元素分析,电子,IR,1 H NMR和13 C NMR光谱研究对配体和配合物进行表征。的N-苯甲酰化引起红移λ最大的复合物的值。配体L配合物的循环伏安图图1示出了在-1.00至-1.04V范围内的单电子准可逆的还原波,而L 2和L 3的则显示了两个准可逆的还原峰。镍配合物在+1.05至+1.15 V范围内的正电势下显示单电子准可逆氧化波。单核铜(II)配合物的ESR谱图显示四条线,具有核超细自旋的方平面几何特征3/2。所