13462-90-3Relevant academic research and scientific papers
Crystal growth and properties of PbI2 doped with Fe and Ni
Rybak,Lun',Bordun,Omelyan
, p. 1124 - 1127 (2005)
A procedure is described for doping PbI2 single crystals with Fe and Ni during vapor-phase growth in a closed system in the presence of excess iodine. The rate of mass transport in the system and the doping level of the crystals are shown to be governed by the dopant content in the source material and the source temperature. The effect of Fe and Ni doping on the low-temperature (5 K) exciton photoluminescence spectrum of PbI2 is discussed.
The metal carbonyls
Blanchard, Arthur A.
, p. 311 - 317 (1941)
When the metal carbonyls were first discovered, their properties were startling because they seemed to violate nearly all the previously recognized generalizations of chemistry. Even to-day the existence of the carbonyls is not particularly emphasized in
Infrared spectra of the gaseous iodides from chromium, iron and nickel
Konings, R. J. M.,Booij, A. S.
, p. 39 - 48 (1992)
The infrared spectra of the vapours above chromium, iron and nickel diiodide have been studied by high-temperature infrared spectroscopy.The gaseous molecules CrI2, FeI2 and NiI2 were all identified and the interpretation of the spectra is in agreement with a linear structure.Additional strong absorption bands in the spectra of the vapour phase above liquid CrO2 and FeI2 were assigned to dimeric (MI2)2 molecules.Valence force constants and thermodynamic quantities have been calculated.
ENCAPSULATION OF THE TRANSITION METALS CHROMIUM THROUGH COBALT IN ZIRCONIUM CLUSTER IODIDES.
Hughbanks,Rosenthal,Corbett
, p. 1511 - 1516 (1988)
The zirconium iodide phases discussed all possess clusters with a formal electron count of 18 or more. We detail our efforts concerning the synthesis, structural characterization, magnetic properties, and electronic structure of zirconium iodide cluster compounds featuring the enclosure of the transition metals Cr, Mn, Fe, and Co. It is found that the iron-zirconium bonding in the cluster is notably greater than that in Zr//3Fe. The phase CsZr//6I//1//4Mn is properly diamagnetic, while the magnetic susceptibility data for the 19-electron Zr//6I//1//2Mn are well described by a high-temperature mu //e//f//f of 1. 84 mu //B and an intracluster spin-orbit coupling that partially quenches the moment at lower temperatures.
Thermal studies of N(1)-isopropyl-2-methyl-1,2-propanediamine complexes of nickel(II)X2 [X = I(1-), CF3CO2(1-), 0.5SO4(2-) and 0.5SeO4(2-)] in the solid state
Pariya, Chandi,Ghosh, Ashutosh,Ray Chaudhuri, Nirmalendu
, p. 153 - 160 (1995)
The complexes NiL2X2.nH2O (L = N(1)-isopropyl-2-methyl-1,2-propanediamine; X = 0.5SO4(2-) when n = 0; X = I(1-) when n = 2; X = CF3CO2(1-) when N = 0 or 2 and X = 0.5SeO4(2-) when n = 0 or 3) have been synthesized and their thermal behaviour has been studied. All the hydrated complexes are yellow in colour and on heating lose water of hydration accompanied by a yellow light blue thermochromic transition, except in the case of the iodide complex, which retains the original yellow colour on dehydration. However, NiL2I2 undergoes an irreversible exothermic phase transition (166-193°C; ΔH = -7.5 kJ mol**-1) with change in colour from yellow to reddish yellow. NiL2(CF3CO2)2 shows a reversible phase transition (heating cycle, 144-170°C; ΔH = 3.1 kJ mol**-1; cooling cycle, 158-135°C; ΔH = -3.1 kJ mol**-1) with no visual change in colour. All the yellow complexes posses square-planargeometry and the light blue complexes NiL2X2 (X = CF3CO2(1-), 0.5SO4(2- ) and 0.5SeO4(2-)) are expected to be pentaccordinated. The phase transition occuring in NiL2X2 (X = I(1-) and CF3CO2(1-)) is due to conformational changes of the diamine chelate rings.
Asymmetric reduction and hydrogenation over heterogeneous catalysts prepared by reacting nickel-boride with norephedrine
Court,Molvinger,Lopez
, p. 267 - 273 (1999)
Nanoparticles of NiB2 were prepared by reducing nickel iodide with lithium borohydride in anhydrous oxygen-free THF. The hydroxy group and the amino-group of norephedrine reacted with boron atoms, evolving 1 mol of hydrogen for each mole of amino alcohol to afford a chiral oxazaborolidine anchored at the surface of the particles. The reduction of acetophenone utilizing borane-THF as reducing agent in the presence of 1 equivalent of NiB2 bound oxazaborolidine afforded 1-phenylethanol was excellent enantioselectivity (ee). The oxazaborolidine was strongly bound to the particles since the catalyst could be recycled at least two times with no performance loss. The catalyst hydrogenated 4-methylpentan-2-one, isophorone, and acetophenone, into 4-methyl-pentan-2-ol, dihydroisophorone, and 1-phenylethanol, respectively, in any case the S configuration predominated slightly. The ee was constant when the catalyst was reused. The catalytic hydrogenation over an oxazaborolidine boron bound to Ni particles was not useful in the enantioselective synthesis of alcohol.
Polymer complexes. LIV. Structural and spectral studies of supramolecular coordination polymers built from Ni(II), Fe(II) and Pd(II) with sulphadrug
El-Sonbati,Belal,Diab,Mohamed
, p. 26 - 31 (2011/04/23)
Polymer complexes of p-acrylamidyl sulphaguanidine (HL) with Ni(II), Fe(II) and Pd(II) salts have been prepared. The structures of the polymer complexes were elucidated using elemental analysis, 1H NMR, UV-Vis, IR spectroscopies, magnetic moment, molar conductance and thermal analysis. The polymer complexes were isolated in 1:1 and 1:2 (M:L) ratios. The solid monocomplexes (1:1) (M:L) were isolated in the general formula [Fe(HL)O 2SO2(OH2)2]. The biscomplexes (1:2) (M:L) solid chelates found to have the general formula [Ni(HL)2X 2]n (X = Cl-, Br-, I-, NO3, NCS- ), [Fe(HL)(en)(OSO3)(OH 2)]n and [Ni(HL)2(Py)2] nX2, while {[Pd(L)X]2}n (1:1) (X = Cl- or Br-). In all the polymer complexes the ligand and anions were found to be coordinated to the Ni(II) and Fe(II) ions. The bidentate nature of the ligand is evident from IR spectra. The magnetic and spectroscopic data indicate a octahedral geometry for complexes. The thermal behaviour of these chelates shows that the hydrated complexes loss water molecules of hydration in the first step followed immediately by decomposition of the anions and ligand molecules in the subsequent steps.
Second harmonic generation in boracites
Zagudailova,Plachinda,Berdonosov,Stefanovich,Dolgikh
, p. 393 - 396 (2008/10/09)
The M3B7O13X (M=Mg, Ni, Cd; X=Cl, Br, I) boracites were synthesized and characterized by x-ray diffraction and second harmonic generation. Their nonlinear optical susceptibility was estimated using the Phillips-Van Vechten
Chemical bond and hybridization in nickel compounds
Pollini I.
, p. 1 - 5 (2008/10/08)
By means of ultraviolet reflectance and valence band photoemission one can get a scale of ionicity for nickel halides. The fraction of ionic character of the chemical bond, from 0.72 in NiI2 to 0.80 in NiCl2, evaluated with the Phillips theory has been related to the ground state d electron counts ?ndn? calculated from Ni2p core photoemission. While the chemical trends of cluster model parameters are in general well reproduced, a systematic discrepancy in band gap values (2-3 eV) has been found by comparing core-level results with optical and photoconductivity data.
Thermal studies of N-phenylethane-1,2-diamine complexes of nickel(II) in the solid state
Das,Chaudhuri
, p. 895 - 902 (2008/10/08)
[NiL3]X2, (where L = N-phenylethane-1,2-diamine and X = I- and ClO4-), [NiL2X2] (X is Cl-, Br-, NCS-, 0.5SO42- or 0.5SeOsu
