Coordination compounds of methyl gallium hydrides

1969 ◽  
Vol 47 (4) ◽  
pp. 673-679 ◽  
Author(s):  
A. Storr ◽  
V. G. Wiebe
Keyword(s):  
Coordination Compounds ◽  
Proton Magnetic Resonance ◽  
Proton Magnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Relative Stabilities ◽  
New Class ◽  
Gallium Hydride ◽  
Derivatives Of ◽  
Gallium Compounds

Although the organo hydride derivatives of boron and aluminium are well characterized, little work has been reported on the corresponding gallium systems. The present study was initiated to determine the relative stabilities of organo gallium hydride derivatives as compared to the stabilities of the corresponding compounds of boron and aluminium. Various preparative routes in this new class of gallium compounds have been investigated. These include the use of organo mercury and organo lithium reagents in reactions with gallium hydride compounds and their halogen substituted derivatives, and also equlibration reactions between gallium hydride and organo gallium compounds. Both infrared and proton magnetic resonance spectroscopy techniques have been used extensively in following the progress of these reactions and in the characterization of the products.

Study of oxygen compounds of acid character of Garbi Absheron field oil

2021 ◽  
pp. 43-45
Author(s):  
G.S. Mukhtarova ◽  
◽  
B.A. Huseinova ◽  
B.M. Aliev ◽  
S.A. Alieva ◽  
...  
Keyword(s):  
Proton Magnetic Resonance ◽  
Proton Magnetic Resonance Spectroscopy ◽  
Group Composition ◽  
Resonance Spectroscopy ◽  
Structural Group ◽  
Alkali Extraction ◽  
Middle Molecules ◽  
Structural Group Composition ◽  
Derivatives Of ◽  
Acid Character

The paper presents the results of fraction and structural-group composition of acids and phenols of Garbi Absheron field oil. Studied oil is heavy, tarry, low paraffinic. The acids and phenols have been purified from the oil with their differentiation on the free and associated (in the form of compound esters) forms. Free acids and phenols were purified from the oil via alkali extraction. Their associated forms were purified after saponification of the oil released from the samples. To study the structure-group content of acids and phenols, proton-magnetic resonance spectroscopy method was used. Obtained results showed that acidic oxygen-containing compounds in Garbi Absheron field oil predominantly consist of associated acids and phenols in the form of compound esters. Middle molecules of these phenols contain condensed naphtenic-aromatic cycles, the acids by their structure belong to the derivatives of hydrocarbons of paraffin series of CH3 residual-substitutes.

The Preparation and Characterization of Colloidal Polypyrrole

1994 ◽  
Vol 47 (1) ◽  
pp. 1 ◽  
Author(s):  
P Baker ◽  
D Matthews ◽  
A Hope
Keyword(s):  
Electron Microscopy ◽  
Cyclic Voltammetry ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Proton Magnetic Resonance ◽  
Proton Magnetic Resonance Spectroscopy ◽  
Reduction Potential ◽  
Aqueous Ethanol ◽  
Resonance Spectroscopy

This paper describes the preparation and properties of colloidal polypyrrole. The polypyrrole was prepared by the oxidation of pyrrole with potassium persulfate in acidic, 25% aqueous, ethanol at 95°C. Absorption spectra showed that the reaction produced both unoxidized polypyrrole (ppy0) and oxidized polypyrrole ( ppy +), which were separated by precipitating the ppy + with water. The resulting ppy + was readily redispersed in ethanol to yield a strongly coloured , transparent, dispersion. Cyclic voltammetry of the dispersion yielded well defined peaks for reduction and reoxidation with a standard reduction potential of approximately -0.39 V v . s.c.e . The ppy + was also characterized by fluorescence spectroscopy, proton magnetic resonance spectroscopy and electron microscopy.

Longitudinal Brain Metabolic Characterization of Chronic Alcoholics With Proton Magnetic Resonance Spectroscopy

2002 ◽  
Vol 26 (9) ◽  
pp. 1368-1380 ◽  
Author(s):  
Mitchell H. Parks ◽  
Benoit M. Dawant ◽  
William R. Riddle ◽  
Steven L. Hartmann ◽  
Mary S. Dietrich ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Proton Magnetic Resonance ◽  
Proton Magnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy
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