Pseudoclathrochelate n-hexadecylboron-capped metal(II) tris-pyrazoloximates: synthesis, X-ray structure, spectral and magnetic characteristics
作者:Oleg A. Varzatskii、Svetlana V. Kats、Alexander A. Pavlov、Alexander S. Belov、Irina G. Belaya、Yulia V. Nelyubina、Valentin V. Novikov、Yan Z. Voloshin
DOI:10.1016/j.ica.2017.11.034
日期:2018.2
were characterized using elemental analysis, MALDI-TOF mass spectrometry, IR, UV-Vis-NIR, 57Fe Mossbauer (for the iron complex), 1H and 13C NMR spectroscopy, as well as by SQUID magnetometry. The structure of the complexes synthesized was also confirmed by single crystal X-ray diffraction analysis of the zinc(II) pseudoclathrochelate. Its pseudocaged zinc(II) ion is located almost in the center of ZnN6-coordination
摘要以2-乙酰基吡唑肟与正十六烷基硼酸的一锅模板缩合反应为例,对十六烷基硼封端的锌,钴,铁和锰(II)三吡唑并肟假螯合物进行了自组装。金属离子作为基质。三个吡唑并肟合成子的三个末端吡唑基NH基团的氢原子通过与氯反离子Cl-…(HN)3的氢键形成假大环双环配体,从而使相应的金属离子包封。使用元素分析,MALDI-TOF质谱,IR,UV-Vis-NIR,57Fe Mossbauer(用于铁络合物),1H和13C NMR光谱以及SQUID磁力分析对所得复合物进行表征。合成的配合物的结构也通过对拟螯合物锌(II)的单晶X射线衍射分析来证实。它的假笼形锌(II)离子几乎位于ZnN6配位多面体的中心,它采用具有非常低畸变角的三角棱柱形几何形状。从可变温度磁力数据中可以看出,在50-300К温度范围内,锰和铁(II)伪铁螯合物的χT值接近于理论纯高自旋值,没有轨道贡献。吡唑并肟酸核的1H和13C NMR