The infra-red spectra of uranium species in carbon tetrachloride solutions of uranium (VI), dibutyl phosphoric acid and Tri-n-octyl phosphine oxide

1961 ◽  
Vol 19 (1-2) ◽  
pp. 142-155 ◽  
Author(s):  
J. Kennedy ◽  
A.M. Deane
Keyword(s):  
Carbon Tetrachloride ◽  
Phosphoric Acid ◽  
Phosphine Oxide ◽  
Infra Red ◽  
Uranium Species

scholarly journals Cleavage of the carbon–phosphorus bond in chloromethyl–phosphorus compounds by phosphorus pentachloride

1968 ◽  
Vol 46 (22) ◽  
pp. 3573-3577 ◽  
Author(s):  
Arlen W. Frank
Keyword(s):  
Carbon Tetrachloride ◽  
Phosphine Oxide ◽  
Bond Cleavage ◽  
Phosphorus Pentachloride ◽  
Phosphorus Trichloride ◽  
Phosphorus Compounds ◽  
Concerted Mechanism ◽  
Phosphonium Chloride

A novel carbon–phosphorus bond cleavage is described. Chloromethylphosphonic dichloride (2) and bis(chloromethyl)phosphinic chloride (1) both react smoothly and quantitatively with phosphorus pentachloride at 95–100°, giving carbon tetrachloride and a P(III) fragment containing one less carbon–phosphorus bond: phosphorus trichloride from 2 and trichloromethylphosphonous dichloride from 1. Under the same conditions, tris(chloromethyl)phosphine oxide (3) forms a complex (4) which subsequently breaks down to trichlorobis(trichloromethyl)phosphorane (5), diphenyl chloromethylphosphonate (7) suffers chlorination without cleavage, and tetrakis(chloromethyl)phosphonium chloride (6) is neither chlorinated nor cleaved. A concerted mechanism is proposed which accounts for ail of these results.

scholarly journals Investigations of infra-red spectra (2.5—7.5 µ ). Absorption of water

1940 ◽  
Vol 174 (957) ◽  
pp. 234-262 ◽  
Keyword(s):  
Carbon Tetrachloride ◽  
Carboxylic Acid ◽  
Intense Band ◽  
Low Concentrations ◽  
Sharp Band ◽  
Infra Red

During recent years much information has been obtained concerning the infra-red absorption of hydroxy bodies in the region about 3 µ number of investigators (Errera and Mollet 1936; Errera 1937 a ; Buswell, Deitz and Rodebush 1937; Buswell, Rodebush and Roy 1938; Davies and Sutherland 1938 a, b ; Fox and Martin 1937) have shown that at low concentrations in carbon tetrachloride a hydroxy body, whether an alcohol, phenol or carboxylic acid, has a sharp OH band at 2.75-2.83 µ , and as the concentration increases this band diminishes rapidly and is replaced by a wide intense band at longer wave-lengths, 3 µ and higher. The sharp band is due to the valency O-H vibration in the monomer, while at higher concentrations the molecules interfere with one another and modify the nature of the O-H vibrations in a manner which depends somewhat on the nature of the compound concerned.

Solvation properties in iso-acidic media involving phosphoric acid

1988 ◽  
Vol 66 (9) ◽  
pp. 2422-2427 ◽  
Author(s):  
C. Louis ◽  
A. Bebba ◽  
J. Bessière
Keyword(s):  
Carbon Tetrachloride ◽  
Phosphoric Acid ◽  
Water Activity ◽  
Ionic Species ◽  
Concentrated Solutions ◽  
Acidic Media ◽  
Acidic Solutions ◽  
Mineral Acids ◽  
Acidity Level ◽  
Silver Extraction

Concentrated solutions of mineral acids (phosphoric, hydrochloric, perchloric, sulfuric) are characterized, for an equal value of their water activity, by an equal R0(H) acidity level (iso-acidic solutions). By mixing them, we prepare what we call iso-acidic mixtures which keep the same acidity level as the constitutive solutions whatever the proportions; their redox and solvating properties depend both on the nature and on the ratio of the constitutive solutions. Reactivity variations for ionic species: Cl−, Br−,I−, diethyldithiophosphate (LET−), Si(W3Ol0)44−, Si(W3O10)45−, Cu2+, Cu+, Pb2+, Sn2+, Cd2+, Zn2+, Ag+, Fe3+, Fe2+, UO22+, U4+ in the iso-acidic mixtures are characterized by their ƒ solvation-transfer activity coefficients. Relations between ƒ coefficient values and complexation properties are established and it is shown that phosphoric acid has comparatively weak solvating properties toward most species. The possibility for anticipating reaction changes with the iso-acidic mixture composition by using the ƒ coefficients is demonstrated in the case of cadmium ionic flotation with diethyldithiophosphate and silver extraction with dithizone in carbon tetrachloride.

Sign in / Sign up

Export Citation Format

Share Document