Synthesis, crystal structure and magnetic properties of new copper(II) complexes based on 3-(2-pyridyl)-1,2,4-triazole
作者:Yuliia P. Petrenko、Dmytro M. Khomenko、Roman O. Doroshchuk、Sergiu Shova、Ghénadie Novitchi、Karolina Piasta、Elzbieta Gumienna-Kontecka、Rostyslav D. Lampeka
DOI:10.1016/j.ica.2019.119216
日期:2020.1
Abstract The synthesis, crystal structure, spectroscopic and magnetic properties of binuclear [Cu2(L)2(SO4)(H2O)3]·3H2O (4a) and tetranuclear [Cu4(HL)2(L)4(DMF)2(SO4)2]·DMF (4b) copper(II) complexes were reported (where HL is 3-(pyridine-2-yl)-1,2,4-triazole). Potentiometric titrations, ESI-MS and spectrophotometric studies of complex formation in MeOH/H2O solutions indicated the presence of monomeric
摘要双核[Cu2(L)2(SO4)(H2O)3]·3H2O(4a)和四核[Cu4(HL)2(L)4(DMF)2(SO4)的合成,晶体结构,光谱和磁性)2]·DMF(4b)铜(II)配合物(其中HL是3-(吡啶-2-基)-1,2,4-三唑)。电位滴定,ESI-MS和分光光度法研究在MeOH / H2O溶液中形成的络合物表明存在单体[CuHL] 2+,双核[Cu2L2] 2+和[Cu2L2(OH)] +和三核[Cu2L3] +,并且[Cu2L3(OH)]种。小的N,N成核配体HL导致复合物的超分子形成。该配体包含被吡啶基取代的三唑部分,该三唑部分被策略性地定位以形成螯合的金属环。两种络合物的基础是通过三唑环的N1-N2二嗪基团桥接的两个金属中心。对于复合物4b,两个HL也通过唑基的NPy和N4在酸型中配位。多面体之间存在显着差异,即核性和Cu…Cu分离。通过元素分析,质谱,IR光谱和X射线分析