Structural Formulae of Layer Silicates

2015 ◽  
pp. 114-136
Author(s):  
B. Číčel ◽  
P. Komadel
Keyword(s):  
Layer Silicates ◽  
Structural Formulae

New Coordination Compounds of Fe(III) with Organic Ligands

2009 ◽  
Vol 59 (12) ◽  
Author(s):  
Mihaela Flondor ◽  
Ioan Rosca ◽  
Doina Sibiescu ◽  
Mihaela-Aurelia Vizitiu ◽  
Daniel-Mircea Sutiman ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Complex Compounds ◽  
Organic Ligands ◽  
X Ray Diffraction ◽  
X Ray ◽  
Elemental Chemical Analysis ◽  
Structural Formulae ◽  
Paramagnetic Properties

In this paper the synthesis and the study of some complex compounds of Fe(III) with ligands derived from: 2-(4-chloro-phenylsulfanyl)-1-(2-hydroxy-3,5-diiodo-phenyl)-ethanone (HL1), 1-(3,5-dibromo-2-hydroxy-phenyl)-2-phenylsulfanyl-ethanone(HL2), and 2-(4-chloro-phenylsulfanyl)-1-(3,5-dibromo-2-hydroxy-phenyl)-ethanone (HL3) is presented. The characterization of these complexes is based on method as: the elemental chemical analysis, IR and ESR spectroscopy, M�ssbauer, the thermogravimetric analysis and X-ray diffraction. Study of the IR and chemical analysis has evidenced that the precipitates form are a complexes and the combination ratio of M:L is 1:2. The central atoms of Fe(III) presented paramagnetic properties and a octaedric hybridization. Starting from this precipitation reactions, a method for the gravimetric determination of Fe(III) with this organic ligands has been possible. Based on the experimental data on literature indications, the structural formulae of the complex compounds are assigned.

Crystal-chemical peculiarities of globular layer silicates of the glauconite-illite composition (Upper Proterozoic, Northern Siberia)

2012 ◽  
Vol 47 (6) ◽  
pp. 491-512 ◽  
Author(s):  
T. A. Ivanovskaya ◽  
T. S. Zaitseva ◽  
B. B. Zvyagina ◽  
B. A. Sakharov
Keyword(s):  
Crystal Chemical ◽  
Northern Siberia ◽  
Layer Silicates ◽  
Upper Proterozoic

Intracrystalline Pinacol Rearrangement in Layer Silicates

1988 ◽  
Vol 161 (1) ◽  
pp. 453-458 ◽  
Author(s):  
Elvira Gutierrez ◽  
Eduardo Ruiz-hitzky
Keyword(s):  
Layer Silicates ◽  
Pinacol Rearrangement

Synchrotron radiation FTIR micro-spectroscopy of natural layer-silicates in the O–H stretching region

2006 ◽  
Vol 49 (1-2) ◽  
pp. 64-68 ◽  
Author(s):  
M. Piccinini ◽  
G. Cibin ◽  
A. Marcelli ◽  
A. Mottana ◽  
G. Della Ventura ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Layer Silicates

Structural charge location dictates speciation and lability of copper in swelling layer silicates

2021 ◽  
pp. 106332
Author(s):  
Jason W. Stuckey ◽  
Jovan Livada ◽  
Carmen Enid Martínez
Keyword(s):  
Layer Silicates

Chemistry of biotites from a zoned granitic pluton in Morocco

1983 ◽  
Vol 47 (344) ◽  
pp. 365-369 ◽  
Author(s):  
A. Mahmood
Keyword(s):  
Chemical Analyses ◽  
Granitic Pluton ◽  
Structural Formulae ◽  
Host Rocks

AbstractChemical analyses and structural formulae of biotites from the Zaër pluton, a zoned granitic body in the Central Hercynian Massif of Morocco, are presented. The pluton grades from more mafic single-mica granodioritic facies near the margin to more felsic two-mica granitic facies in the central part. There is a relationship between the composition of the biotites and that of the host rocks. Biotite composition in the internal two-mica facies was influenced by a hydrothermal phase.

Massenspektrometrische Untersuchungen an Borchelaten, V [1] Fragmentierung borhaltiger aromatischer Azoverbindungen / Mass Spectrometric Investigation of Boron Chelates, V [1]Fragmentation of Aromatic Azo Compounds Containing Boron

1980 ◽  
Vol 35 (3) ◽  
pp. 316-318 ◽  
Author(s):  
Eberhard Hohaus ◽  
Wolfgang Riepe ◽  
Klaus Wessendorf
Keyword(s):  
Chelate Ring ◽  
Mass Spectrometric ◽  
Azo Compounds ◽  
Spectrometric Investigation ◽  
Mass Spectrometric Investigation ◽  
Boron Chelates ◽  
Molecular Ion ◽  
Significant Change ◽  
Structural Formulae ◽  
Aromatic Azo Compounds

Differing fragmentation of boron chelates of aromatic azo compounds confirms the structural formulae 1a-7c, presented in [2].More significant differences are caused by the substituent of the boron R (F instead of C6H5).Although certain rules can be deduced by the substitution of F for CeHs with regard to the change in intensity of the ions M+, M+-R (and others), in some cases the stable aromatic azo system causes a significant change in the fragmentation as compared with that of azomethine chelates. The chelates 7 eliminate “RH” and show no molecular ion. Apparently a second chelate ring is closed before further fragmentation can start. Fragmentation of 7 a and b is analogous to 5.

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