An investigation of the chemistry of ferrocenoyl derivatives. The synthesis and reactions of ferrocenoyl imidazolide and its derivatives
作者:Christopher Imrie、Leanne Cook、Demetrius C Levendis
DOI:10.1016/s0022-328x(01)00915-9
日期:2001.12
red crystalline compound that is stable at <5 °C in the dark and it acts as an efficient ferrocenoyl equivalent. It reacts rapidly with alkoxides to give esters and with thiolates to give thioesters. Its reaction with Lawesson's reagent gave diferrocenoyl disulfide. Attempts to make diferrocenoyl peroxide by reacting ferrocenoyl imidazolide with hydrogen peroxide were unsuccessful. Ferrocenoyl imidazolide
Lithium-Ion Conductors of the System LiCo1−xFexO2, Preparation and Structural Investigation
作者:M. Holzapfel、C. Haak、A. Ott
DOI:10.1006/jssc.2000.9026
日期:2001.2
for these compounds by X-ray analysis, indicating mixed transitionmetal layers and sodium layers without cation disorder. By ion-exchange of these compounds in a molteneutectic mixture of LiCl and LiNO3 at 260°C the system LiCo1−xFexO2 was prepared for the whole composition range and characterized by chemical analysis, X-ray diffraction and FTIR spectroscopy. Atomic absorption spectroscopy showed almost
该系统的NaCo的层状结构氧化物1- X的Fe X ø 2分别为0≤制备X通过固态反应≤1。通过X射线分析证明了这些化合物的Vegard样行为,表明混合的过渡金属层和钠层没有阳离子紊乱。通过在260°C下将LiCl和LiNO 3的熔融共熔混合物中的这些化合物进行离子交换,可以形成LiCo 1- x Fe x O 2系统制备了适用于整个组成范围的化合物,并通过化学分析,X射线衍射和FTIR光谱进行了表征。原子吸收光谱法显示钠到锂几乎完全发生了离子交换。该系统的成员显示为在菱面体空间群R m(α -NaFeO 2型)中作为钠化合物结晶。X射线衍射,基于强度比R 101 = I 101 / I 104和Rietveld精炼的考虑提供了证据,表明随着铁含量的增加,阳离子无序性增加,在铁含量为70 %时已经达到LiFeO 2(4.5%)的值。X= 0.4。
Sur la stabilité thermique des étalons analytiques. III
作者:Clément Duval
DOI:10.1016/0003-2670(56)80040-8
日期:1956.7
Resume Dans cette troisieme etude de 12 substances utilisees a des titres divers, apres pesec, en chimie analytique, nous avons insiste sur le comportement thermique, fourni la temperature maximum pour le sechage et donne le spectre mfrarouge en vue de l'identification rapide des corps et de leurs impuretes eventuclles.
Resume Dans cette troisieme etude de 12 Materials utilisees a des titres divers、apres pesec、en chimie analytique、nous avons persiste sur le comportement thermique、fourni la temperature maximum pour le sechage et donne le spectre mfrarouge en vue de l' et de leurs 不纯洁的事件。
Reactions of Sodium-Potassium Alloys with Inert Gas Impurities − Potential Hazards after Oxidation
handling of bubblers installed to remove traces of oxygen and water vapor from blanket gases of LMFR (liquidmetal fast reactors). Moreover, it revealed a controversy with respect to the explosive hazard of the NaK alloys + KO2 reaction. A thermodynamic study of the reaction of a NaK alloy with oxygen as well as experimental work on mixtures containing NaK and different oxides (KO2, Na2O, Na2O2) led to
Synthesis, Crystal and Magnetic Structures of the Sodium Ferrate (IV) Na4FeO4 Studied by Neutron Diffraction and Mössbauer Techniques
作者:C. Jeannot、B. Malaman、R. Gérardin、B. Oulladiaf
DOI:10.1006/jssc.2002.9520
日期:2002.5
connected by Na atoms characterizes the structure. This compound is antiferromagnetic below TN=16 K. At 2 K the magnetic cell is twice the nuclear cell and the magneticstructure is collinear (μFe=3.36(12) μB at 2 K). This black compound is highly hygroscopic. In water or on contact with the atmospheric moisture it is disproportionated in Fe3+ and Fe6+. The Mössbauer spectra of Na4FeO4 are fitted with one
碱式高铁酸钠(IV)Na 4 FeO 4是在400°C的真空下,通过过氧化钠Na 2 O 2和索氏体Fe 1- x O的摩尔比Na / Fe = 4的固相反应制备的。粉末X射线和中子衍射研究表明,Na 4 FeO 4在三斜晶系P -1中结晶,晶胞参数为a = 8.4810(2)Å,b = 5.7688(1)Å,c = 6.5622(1)Å ,α= 124.662(2)°,β= 98.848(2)°,γ= 101.761(2)°和Z= 2。Na 4 FeO图4与其他已知相Na 4 MO 4(M = Ti,Cr,Mn,Co和Ge,Sn,Pb)同型。对于x = 0–1存在固溶的Na 4 Fe x Co 1- x O 4,我们用x跟踪了单元参数的演变,以确定Na 4 FeO 4的三斜晶格的晶格参数。由Na原子连接的孤立的FeO 4四面体的三维网络表征了该结构。该化合物在T N = 16 K以下为反铁磁性。在2