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
Solvent-Induced Encapsulation of Cobalt(II) Ion by a Boron-Capped tris-Pyrazoloximate
作者:Alexander S. Belov、Yan Z. Voloshin、Alexander A. Pavlov、Yulia V. Nelyubina、Svetlana A. Belova、Yan V. Zubavichus、Varvara V. Avdeeva、Nikolay N. Efimov、Elena A. Malinina、Konstantin Yu. Zhizhin、Nikolay T. Kuznetsov
DOI:10.1021/acs.inorgchem.9b03335
日期:2020.5.4
equal to 1.22(16) and 2.58(17)° for two symmetry-independent pseudoclathrochelate cations, both containing the encapsulated cobalt(II) ion in its high-spin state (Co-N 2.115(4)-2.198(3) Å). Magnetic properties of this complex were studied both by dc-magnetometry and by solution-state NMRspectroscopy to reveal a high magnetic anisotropy, thus suggesting a large magnetic susceptibility tensor anisotropy
通过2-乙酰基吡唑肟,苯基硼酸和新型DMF钴(II)溶剂合物与十氯-双氯甲烷分解的二价阴离子进行模板反应,获得硼交联的钴(II)假螯合物钴。正如单晶X射线衍射所证实的,该络合物用两个不对称的钴(II)假螯合物阳离子,一个十氯-氯-十-脱氧阴离子,一个苯,一个二氯甲烷溶剂分子和两个DMF分子结晶。后者通过与吡唑基团形成NH··O氢键,充当单封的三吡唑并肟酸酯配体的假封端片段。CoIIN6-配位多面体采用近似理想的TP几何结构,对于两个独立于对称的假螯合物阳离子,畸变角φ等于1.22(16)和2.58(17)°,均包含处于高自旋状态(Co-N 2.115(4)-2.198(3)Å)的包封的钴(II)离子。通过直流电磁法和溶液态NMR光谱研究了该复合物的磁学性质,显示出较高的磁各向异性,从而表明磁化率张量各向异性大(在298 K下为25.8×10-32 m3),并且负零较大场分裂能(-85 cm
Effects of solvatomorphism, the nature of a chelating ligand synthon and a counterion on the single crystal XRD structure and SMM properties of paramagnetic monocapped cobalt(<scp>ii</scp>) tris-pyrazoloximates
作者:Svetlana A. Belova、Alexander S. Belov、Anastasia A. Danshina、Yan V. Zubavichus、Dmitriy Yu. Aleshin、Alexander A. Pavlov、Nikolay N. Efimov、Yan Z. Voloshin
DOI:10.1039/d3dt03025c
日期:——
A series of monocapped cobalt(II) tris-pyrazoloximates was obtained through the template condensation of the corresponding pyrazoloxime, phenylboronic acid and a suitable cobalt(II) halogenide. Comparing 3-acetylpyrazoloxime versus its methine-containing homolog, the former produced cobalt(II) clathrochelates in substantially higher yields due to the electron donating effect of the methyl substituent
通过相应的吡唑肟、苯基硼酸和合适的卤化钴( II )的模板缩合得到一系列单封端的三吡唑肟钴( II )盐。比较3-乙酰基吡唑肟与其含次甲基同系物,由于甲基取代基的给电子效应,增加了其肟基团的N-供体能力,前者以显着更高的产率产生了钴( II )笼形螯合物。它们与电子受体三氟甲基的较少N-供体类似物没有形成这种类型的钴( II )络合物。在所有无溶剂和含溶剂晶体中,封装的钴 ( II ) 离子采用高自旋态,根据 Co-N 键长 2.112(4)–2.188(9) Å 进行测量,并且位于几乎位于其CoN 6配位多面体的中心。他们的 CoN 6多面体具有几乎理想的三棱柱 (TP) 几何形状,畸变角φ低于 4°。这种类似 TP 的几何形状是由 NH 基团和顶端抗衡离子之间的氢键辅助的。缺乏甲基使它们接近理想的TP。相比之下,含甲基配合物中出现了更强的 N-H⋯Cl 氢键,而 Co-N 键长保持不变,平均为
Cage Metal Complexes: Synthesis, X‐ray Structure, and Spectral and Redox Behavior of the First Hybrid Iron(II) Clathrochelatoscorpionate and Its Pyrazoloxime‐Armed Macrocyclic Intermediate
作者:Oleg A. Varzatskii、Svitlana V. Kats (Menkach)、Larysa V. Penkova、Sergey V. Volkov、Alexander V. Dolganov、Anna V. Vologzhanina、Yurii N. Bubnov、Yan Z. Voloshin
DOI:10.1002/ejic.201201545
日期:2013.4.12
cover of this issue is the group of Yan Voloshin at Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences. The image shows the X-ray structure of the firsthybridclathrochelatoscorpionate with an encapsulated iron(II) ion.
俄罗斯科学院 Nesmeyanov 有机元素化合物研究所的 Yan Voloshin 课题组受邀为本期封面。该图像显示了第一个带有包封的铁 (II) 离子的杂合笼螯合蝎酸盐的 X 射线结构。