13462-90-3Relevant articles and documents
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
The reduction of nickel(II) halides by trialkyl phosphites
Vinal, Richard S.,Reynolds
, p. 1062 - 1063 (1964)
-
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.
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
