Oxygen sulphur

Oxygen, sulphur and selenium are known to exist in more than one allotropic form. 

Since tire alkali and alkaline metals have such a high affinity for oxygen, sulphur aird selenium they are potentially useful for the removal of these iron-metallic elements from liquid metals with a lower affinity for these elements. Since the hairdling of these Group I and II elements is hazardous on the industrial scale, their production by molten salt electrolysis during metal rehning is an attractive alternative. Ward and Hoar (1961) obtained almost complete removal of sulphur, selenium and tellurium from liquid copper by the electrolysis of molten BaCla between tire metal which functioned as the cathode, and a graphite anode. 

Unlike oxygen, sulphur can exist in higher valency states and as a result can be incorporated into organic structures in additional ways. Examples include ... 

See Hydrogen Oxygen, Sulphuric acid See other STATIC INITIATION INCIDENTS... 

In Volume 4 the decompositions of inorganic and metal organic compounds are discussed (except for homonuclear diatomic molecules, considered in a later section). Chapter 1 covers hydrides (and deuterides) of oxygen, sulphur, nitrogen, boron, etc, Chapter 2 deals with oxides, sulphides and derivatives, Chapter 3 with... 

The addition of oxygen, sulphur, or selenium to 2-hydro-4-methyl-l,3,2-dioxa-phosphorinan proceeds stereospecifically.143... 

Another class of compounds, dihydrotellurophenes, exhibits antioxidant activity together with the oxygen, sulphur and selenium analogues. ... 

Potassium dihydrogenphosphide dissolved in dimethylformamide, is probably dissociated into ions. This is confirmed by the equivalent conductance, the value of 77.0 f2 cm mol was found for a 8 10 mol/cm solution. The PH2 ion is a strong nucleophilic reagent. The study of its chemical behaviour towards oxygen, sulphur and white phosphorus has produced, to date, no conclusive results. The reaction with the latter element results in the formation of an amorphous red-brown substance of composition KPsH2 which is soluble in dimethylformamide. ... 

Compounds vf Sulphur and Oxygen. — Sulphur appears to have a great affinity for oxygen, with which it combines in many proportions, forming a series of... 

Table of Combinations of Sulphubic Acid or Oxygenated Sulphur with Saltforming Bases in the Order of... 

Conductivity measurements in N/10 aqueous solution show the dissolved gas to be ionised to the extent of 50 per cent., whilst hydrogen selenide in Nj 10 solution is only 4-1 per cent, ionised. The acidity of the hydrides of the elements oxygen, sulphur, selenium and tellurium therefore falls into the regular series II2Te >H2Se >H2S >II20, in inverse order to the stability.6... 

Hydrogen, however, may also react with other impurities such as dissolved oxygen, sulphur, carbon, etc. and form high activity products. Therefore, the effect of hydrogen on the mechanical properties of a crystal is ambiguous. A discussion of fracture at metal/oxide boundaries has been given recently by [F. Ernst (1995)]. 

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