Octahedral Absorption Spectra of the Dipositive 3d Metal Ions in Molten Aluminum Chloride

1964 ◽  
Vol 3 (6) ◽  
pp. 836-841 ◽  
Author(s):  
Harald A. Oye ◽  
Dieter M. Gruen
Keyword(s):  
Metal Ions ◽  
Absorption Spectra ◽  
Aluminum Chloride ◽  
Molten Aluminum

Color Reactions of Rubber and Gutta-Percha

1930 ◽  
Vol 3 (1) ◽  
pp. 22-23
Author(s):  
F. Kirchhof
Keyword(s):  
Carbon Tetrachloride ◽  
Absorption Spectra ◽  
Aluminum Chloride ◽  
Point Of View ◽  
Previous Article ◽  
Reaction Products ◽  
Characteristic Absorption ◽  
Iron Aluminum ◽  
Gutta Percha ◽  
Color Reactions

Abstract A previous article of mine entitled “Observations on Color Reactions of Rubber and Gutta-Percha” has led to the question whether intensely colored reaction products which are obtained by fusion of phenols with bromides of hydrocarbons give characteristic absorption spectra. I have carried out a few preliminary experiments on this subject, which appear to confirm my earlier point of view that the cause of the different colorations is to be found in dispersion color reactions. It is well known that when rubber bromide or gutta-percha bromide is suspended in carbon tetrachloride and is heated with phenol until the carbon tetrachloride is eliminated, a red-violet to blue fusion mixture is obtained, which gives colors of various stabilities depending upon the solvent into which the fusion mixture is dropped. Thus the blue and violet colorations in chloroform are stable for some time, but they change gradually to green and then to brown, with separation of a flocculent precipitate. Yellow-brown reaction products (hydroxyphenylhydrorubber and gutta-percha) are however obtained in the presence of catalysts (iron, aluminum chloride) or by the action of alkalies (NH3, KOH) or by pouring the blue-violet fusion mixtures into ether.

scholarly journals Density, Viscosity and Surface Tension of Molten Aluminum Chloride

1999 ◽  
Vol 67 (6) ◽  
pp. 568-572 ◽  
Author(s):  
Yuzuru SATO ◽  
Yutaka MATSUZAKI ◽  
Minoru UDA ◽  
Akihiro NAGATANI ◽  
Tsutomu YAMAMURA
Keyword(s):  
Surface Tension ◽  
Aluminum Chloride ◽  
Molten Aluminum

Complexation studies of 3-substituted β-diketones with selected d- and f-metal ions

2011 ◽  
Vol 65 (2) ◽  
Author(s):  
Grzegorz Pawlicki ◽  
Bartosz Staniszewski ◽  
Katarzyna Witt ◽  
Włodzimierz Urbaniak ◽  
Stefan Lis
Keyword(s):  
Metal Ions ◽  
Absorption Spectra ◽  
Lanthanide Ions ◽  
Computer Assisted ◽  
Hypersensitive Transition ◽  
Complexation Studies ◽  
Target Factor Analysis ◽  
Derivatives Of ◽  
Hypersensitive Transitions

AbstractResults of spectroscopic investigations related to complex compositions of 3-substituted derivatives of pentane-2,4-dione (β-diketonate) complexes with chosen d- and f-metal ions are presented. Ligands 3-allylacetylacetone (3all-acac) and 3-benzylacetylacetone (3ben-acac) were prepared and used for the complexation study with Cu(II), Co(II), Nd(III), and Ho(III) metal ions. Based on the absorption spectra of lanthanide ions in their hypersensitive transitions, with the use of computer assisted target factor analysis (CAT) and absorption spectra of the ligands with Cu(II) and Co(II), the verification of complex compositions and the determination of their stability constants were achieved. In case of Nd(III) and Ho(III) complexes with β-diketone ligands, absorption of their maxima were studied in the range of hypersensitive transitions 4 I 9/2 → 4 F 7/2 + 4 S 3/2 (λ max ∼ 734 nm and 748 nm) for Nd(III) and in the range of 435–465 nm, corresponding to the hypersensitive transition 5 G 6 → 5 I 8 (λ max ∼ 450 nm), for Ho(III).

ChemInform Abstract: ELECTROOXIDATION OF SULFUR IN MOLTEN ALUMINUM CHLORIDE-SODIUM CHLORIDE(63-37 MOLE PERCENT)

1979 ◽  
Vol 10 (20) ◽  
Author(s):  
R. MARASSI ◽  
G. MAMANTOV ◽  
M. MATSUNAGA ◽  
S. E. SPRINGER ◽  
J. P. WIAUX
Keyword(s):  
Sodium Chloride ◽  
Aluminum Chloride ◽  
Molten Aluminum ◽  
Mole Percent

The optical absorption spectra of certain transition metal ions in muscovite, lepidolite, and fuchsite

1968 ◽  
Vol 5 (1) ◽  
pp. 31-38 ◽  
Author(s):  
G. H. Faye
Keyword(s):  
Transition Metal ◽  
Optical Absorption ◽  
Metal Ions ◽  
Absorption Spectra ◽  
Transition Metal Ions ◽  
Ligand Field ◽  
Optical Absorption Spectra ◽  
Ligand Field Theory ◽  
Octahedral Sites ◽  
Sheet Silicate

The unpolarized optical absorption spectra of the sheet silicate minerals muscovite, lepidolite, and fuchsite have been examined. The spectra, interpreted on the basis of ligand field theory, indicate that all three minerals contain Fe3+ and possibly Ti3+ in octahedral sites. In addition, muscovite is shown to contain octahedrally coordinated Fe2+, lepidolite octahedral Fe2+ and Mn2+, and fuchsite octahedral Cr3+. No evidence was found for transition metals in tetrahedral sites.Some comments are made on the similarity of the spectra of certain of the transition metal ions in several classes of minerals. This leads to the speculation that the cations Fe3+, Mn2+, and Cr3+ may tend to 'mold' their immediate surroundings.

Polarisierte Absorptionsspektren von Technetium(IV) und Rhenium(IV) in trigonalen Hexahalogenostannat(IV)-Einkristallen bei tiefer Temperatur / Polarized low temperature absorption spectra of technetium(IV) and rhenium(IV) in trigonal single crystals of hexahalogenostannates(IV)

1973 ◽  
Vol 28 (1) ◽  
pp. 89-97 ◽  
Author(s):  
H. J. Schenk ◽  
K. Schwochau
Keyword(s):  
Electron Transfer ◽  
Low Temperature ◽  
Metal Ions ◽  
Single Crystals ◽  
Absorption Spectra ◽  
Point Group ◽  
Metal Reduction ◽  
Experimental Values

Polarized absorption spectra of technetium(IV) and rhenium(IV) in trigonal single crystals of (C2H5NH3)2 [SnCl6] and (C2H5NH3)2[SnBr6] have been measured in the range of 8000 to 2800 Å at 298 and 77 °K. The crystal point group is D3d and the metal ions occupy sites of D3d-symmetry too. The observed excited levels arise from both π24d3 and π23d4 configurations; the different temperature and polarisation dependence of d → d intra-shell and π → d metal reduction transitions is discussed. Experimental values of the parameters Dq (cubic) and υ (trigonal) are reported. The nephelauxetic ratio β55 is evaluated from the 4A2g→2T2g intrasubshell transitions. The electron transfer spectra suggest the optical electronegativity xopt = 2.3 for Tc(IV) and xopt = 2.1 for Re(IV).

Densities of aluminum chloride-rich, molten aluminum chloride-lithium chloride mixtures

1979 ◽  
Vol 24 (1) ◽  
pp. 22-24 ◽  
Author(s):  
Ronald A. Carpio ◽  
Lowell A. King ◽  
Armand A. Fannin
Keyword(s):  
Lithium Chloride ◽  
Aluminum Chloride ◽  
Molten Aluminum
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