New MM′O4 oxides derived from the rutile type: synthesis, structure and study of magnetic and electronic properties
作者:J Isasi
DOI:10.1016/s0925-8388(00)01495-x
日期:2001.6
variation of magnetic and electronic properties of MM′O4 (M=Rh, Ni, Co; M′=Sb, V, Te) oxides are reported. These compounds can be regarded as being derived from TiO2 rutiletype, when Ti atoms are formally substituted by two kinds of cations. The crystal structures were refined from X-ray powder diffraction by the Rictveld method. Different structural types are found for all these materials. Magnetic susceptibility
报道了 MM'O4 (M=Rh, Ni, Co; M'=Sb, V, Te) 氧化物的合成、结构表征以及磁性和电子特性的变化。当 Ti 原子被两种阳离子形式取代时,这些化合物可以被视为衍生自 TiO2 金红石型。通过 Rictveld 方法从 X 射线粉末衍射精修晶体结构。所有这些材料都有不同的结构类型。结合每种情况下提出的结构模型讨论了磁化率结果和电导率测量值。
Structural and thermal studies of the chloro complexes of cobalt, nickel and copper with 2,2-bis(acrylamido)acetic acid and assessment of their suitability as anti-static additives for polyethylene
作者:J.R. Allan、A.R. Gardner、B. McCloy、W.E. Smith
DOI:10.1016/0040-6031(92)80156-q
日期:1992.10
Abstract The preparation and properties of the complexes of 2,2-bis(acrylamido)acetic acid with cobalt, nickel and copper are described. Spectral, magnetic and solubility studies indicate that the complexes have polymeric octahedral structures. The decomposition of each compound has been studied using thermogravimetry and differential thermal analysis. The complexes, which are hydrated, lose water followed
Abstract A distorted octahedral nickel(II) complex, [Ni(2-amino-3-(1H-imidazol-4-yl)propanoic acid)2] (1), has been synthesized by a solvothermal method and characterized by single-crystal X-ray diffraction. Geometry optimization in the gas phase and pyridine together with Hirshfeld surface and reduced density gradient analyses reveal that this complex shows different distortions from octahedral in
Complexes [Ni2(μ-OH2)(μ-O2CCH(CH3)2)2L2–4((CH3)2CHCO2)2]: Synthesis, Structure, and Mass Spectrometric Studies
作者:D. O. Blinou、A. A. Nikiforov、V. V. Gurzhiy、A. E. Minkovich、M. Yu. Maksimov、N. S. Panina、A. N. Belyaev、A. V. Eremin
DOI:10.1134/s1070328420020037
日期:2020.2
2-methylpropionate complexes [Ni2(μ-OH2)(μ-O2CCH(CH3)2)2L2–4((CH3)2CHCO2)2] (L is N,N,N',N'-tetramethylethylenediamine (I), pyridine (II), and 2,2'-bipyridyl (III)) are synthesized. The complexes are characterized by elemental and thermal analyses, mass spectrometry, IR and UV–Vis spectroscopy, and X-ray structure analysis (CIF files CCDC nos. 1840763 (I), 1913469 (II), and 1913471 (III)). The forms in which the synthesized
Preparation, Crystal Structure, and Thermal Decomposition of Two Novel Energetic Compounds [Ni(IMI)6](L)2 (L = ClO4- and NO3-) and one Carbonate Compound [Ni(IMI)6](CO3)·5H2O (IMI = Imidazole)
Three novel multi-ligand coordination compounds, namely [Ni(IMI)6](ClO4)2 (1), [Ni(IMI)6](NO3)2 (2), and [Ni(IMI)6](CO3)·5H2O (3) were synthesized and characterized by elemental analysis and FT-IR spectroscopy. The crystalstructures were determined by X-ray single crystal diffraction. The title compounds crystallize monoclinically, rhombohedrally, and hexagonally, and belong to space groups P21/m
三种新型多配体配位化合物,即 [Ni(IMI)6](ClO4)2 (1)、[Ni(IMI)6](NO3)2 (2) 和 [Ni(IMI)6](CO3) ·5H2O(3)被合成并通过元素分析和FT-IR光谱表征。通过X射线单晶衍射确定晶体结构。标题化合物以单斜、菱面体和六边形结晶,分别属于 P21/m、R3 和 P63/m 空间群。镍 (II) 离子被氮原子六配位成六个咪唑分子。采用差示扫描量热法(DSC)和热重-导数热重法(TG-DTG)技术研究了化合物1和2的热分解机理。热分解在氮气气氛中以 10 K·min-1 的加热速率进行,在 DSC 曲线中包含一个介于 350 K 和 500 K 之间的吸热过程和一个介于 500 K 和 800 K 之间的主要放热过程。此外,非等温动力学参数分别使用 Kissinger 和 Ozawa 方法计算。对燃烧能和生成焓进行了测量和计算,结果表明两种化合