1,721,044 research outputs found
Activity and Osmotic Coefficients from the Emf of Liquid Membrane Cells. VI - ZnSO4, MgSO4, CaSO4, and SrSO4 in water at 25 °C
No full textActivity coefficients from the emf of liquid membrane cells. V. Alkaline earth hexacyanoferrates (III) in aqueous solutions at 25° C
No full textChemical Vapor Generation AAS using borane complexes. A contribution to the comprehension of reaction mechanisms in the generation of volatile hydrides
No full textSTUDIES ON CARBONYL DERIVATIVES OF EARLY TRANSITION-ELEMENTS - A CONVENIENT METHOD FOR THE PREPARATION OF THE [NB(CO)6]- ANION AT ATMOSPHERIC-PRESSURE AND ROOM-TEMPERATURE - CRYSTAL AND MOLECULAR-STRUCTURE OF [NB(CO)6]-,[TA(CO)6]- AS THEIR "BIS(TRIPHENYLPHOSPHINE)NITROGEN(1+) DERIVATIVES
No full textA new method is reported for the preparation of [Nb(cO),]- and [Ta(CO)6]- by reductive carbonylation of M2ClIo (M
= Nb, Ta) with the magnesium-zinc-pyridine-CO system. In the case of niobium, the reductive carbonylation occurs
at atmospheric pressure and room temperature with yields as high as 48%. The tetrahydrofuran-stabiliied sodium derivatives
[Na(THF)] [M(CO),] and the bis(triphenylphosphie)nitrogen( 1+) derivatives, PPN[M(CO),] (M = Nb, Ta), are reported.
The crystal and molecular structures of both niobium and tantalum ppN[M(CO),] complexes are described. Both compounds
are isostructural with the corresponding vanadium derivative: rhombohedral, space group Rg, one molecule per cell; M
= Nb, a = 9.832 (4) A, a = 91.98 ( S ) ' , V = 948.7 (7) A3, paid = 1.399 g ~ m -R~ =, 0.0391; M = Ta, a = 9.814 (4)
A, a = 92.02 (8)', V = 943.4 (7) A', pal& = 1.562 g ~ m -R~ =, 0.0294 (Mo Ka,X = 0.71069 A). The geometry of the
two hexacarbonylmetalates is that of an almost perfect octahedron. Chemical and spectroscopic comparisons of the three
[M(CO),]- (M = V, Nb, Ta) anions are made
Activity and Osmotic Coefficients from the Emf of Liquid Membrane Cells. VIII - K3[Co(CN)6], Mg3[Co(CN)6]2, and Ca3[Co(CN)6]2
No full textCold vapour atomic fluorescence studies on the Behaviour of Hg(II) and Hg(II)-Thiol complexes. An alternative route for Characterization of -SH binding groups
No full textChemical vapour generation for atomic spectrometry. A contribution to the comprehension of reaction mechanisms in the generation of volatile hydrides using borane complexes
No full textStudies in Hydride Generation atomic fluorescence determination of selenium and tellurium. Part 1-Self Interference effect in Hydrogen Telluride Generation and the effect of KI
No full textChemical vapor generation atomic spectrometry using amine-boranes and cyanotrihydroborate(III) reagents
No full textChemical Vapour Generation of Arsane in the presence of l-Cysteine. Mechanistic studies and their analytical feedback
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