The present invention has an object to provide a positive electrode active material for a magnesium battery; and a magnesium battery which has a high operating voltage with respect to magnesium and can be repeatedly charged and discharged at a high capacity retention rate, using the positive electrode active material.

The present invention relates to a positive electrode active material for a magnesium battery, containing a compound represented by the general formula (1), a positive electrode material composition for a magnesium battery, a positive electrode for a magnesium battery, and a magnesium battery:

Ag.sub.pSO.sub.4  (1) [in the formula (1), p satisfies 0<p≤2].

The present invention relates to a bisphosphine ligand compound, a chromium compound prepared using same, an ethylene oligomerization catalyst system containing the chromium compound, and an ethylene oligomer preparing method, wherein the bisphosphine ligand compound is suitable for mass production and commercial processes, allows extremely high activity to be compatible with excellent economical benefit, and increases selectivity for ethylene oligomerization reaction, thereby being able to be used to manufacture 1-hexene and/or 1-octene at high yield.

The present invention relates to the use of efficient phosphorous substances, in particular based on diphenylamine and heterocyclic diphenylamine derivatives as stabilizers for organic materials, in particular for plastic materials, against oxidative, thermal and/or actinic degradation. Te present invention additionally relates to an organic material that has been correspondingly stabilized as described above. The invention further relates to a method of stabilizing organic materials and to specific stabilizers.

The present invention relates to a ligand compound, a catalyst system for olefin oligomerization and a method for oligomerizing an olefin using same. The catalyst system for olefin oligomerization according to the present invention exhibits high selectivity to 1-hexene or 1-octene while having excellent catalytic activity, thus enabling more efficient preparation of alpha-olefins.

In the field of organic phosphorus chemistry, especially the chemistry of bulky organophosphorus compounds, a process for the synthesis of compound of formula (I). This process is especially useful to obtain chiral bulky phosphorus compounds. The present invention also relates to compounds of formula (VII), (VIII), (IX) and (X) and their processes of manufacturing starting from a compound of formula (I).

##STR00001##

The present invention relates to an electrolytic solution for a magnesium battery, formed by mixing a compound represented by the following general formula (I), a Lewis acid or a compound represented by the following general formula (A), and a solvent; and the like. ##STR00001## {In the formula, m represents 0 or 2, n represents 2 in a case of m=0 and represents 0 or 1 in a case of m=2, X.sup.1 represents a chlorine atom or a bromine atom, and two R.sup.1's each independently represent a magnesium chloride oxy group; a magnesium bromide oxy group; an alkyl group which may have a halogeno group or the like as a substituent; an alkoxy group; an aryl group which may have an alkoxy group or the like as a substituent; an aryloxy group which may have an alkoxy group or the like as a substituent; or a group represented by the following general formula (1), and two R.sup.1's may also form the following general formula (2).} ##STR00002## (In the formula, four R.sup.10's each independently represent an alkyl group, a perfluoroalkyl group, a phenyl group, or a perfluorophenyl group.)

The present invention relates to an electrolytic solution for a magnesium battery, formed by mixing a compound represented by the following general formula (I), a Lewis acid or a compound represented by the following general formula (A), and a solvent; and the like. ##STR00001## {In the formula, m represents 0 or 2, n represents 2 in a case of m=0 and represents 0 or 1 in a case of m=2, X.sup.1 represents a chlorine atom or a bromine atom, and two R.sup.1's each independently represent a magnesium chloride oxy group; a magnesium bromide oxy group; an alkyl group which may have a halogeno group or the like as a substituent; an alkoxy group; an aryl group which may have an alkoxy group or the like as a substituent; an aryloxy group which may have an alkoxy group or the like as a substituent; or a group represented by the following general formula (1), and two R.sup.1's may also form the following general formula (2).} ##STR00002## (In the formula, four R.sup.10's each independently represent an alkyl group, a perfluoroalkyl group, a phenyl group, or a perfluorophenyl group.)

The present invention relates primarily to processes for preparing particular phosphorus-containing -aminonitriles of the formulae (Ia) and (Ib) defined hereinafter from corresponding phosphorus-containing cyanohydrin esters and to the use thereof for preparation of glufosinate or of glufosinate salts. The present invention further relates to a process for preparing glufosinate or glufosinate salts.

The present invention relates primarily to processes for preparing particular phosphorus-containing -aminonitriles of the formulae (Ia) and (Ib) defined hereinafter from corresponding phosphorus-containing cyanohydrin esters and to the use thereof for preparation of glufosinate or of glufosinate salts. The present invention further relates to a process for preparing glufosinate or glufosinate salts.

The present invention relates to a ligand compound, a catalyst system for olefin oligomerization and a method for oligomerizing an olefin using same. The catalyst system for olefin oligomerization according to the present invention exhibits high selectivity to 1-hexene or 1-octene while having excellent catalytic activity, thus enabling more efficient preparation of alpha-olefins.