Abstract: 1-Hydroxypyrazoles of the formula ##STR1## where R.sup.1, R.sup.2 and R.sup.3 independently of one another are each hydrogen or halogen, and microbicides containing these compounds.

Abstract: 1-Hydroxypyrazole derivatives of the formula (I) ##STR1## where A is ##STR2## n is 0 or 1, R.sup.1, R.sup.2 and R.sup.3 independently of one another are each hydrogen, chlorine, bromine or iodine, R.sup.4 is hydrogen, a straight-chain or branched, open-chain alkyl, alkenyl or alkynyl radical, a cyclic alkyl, alkenyl or alkynyl radical or aryl or aralkyl, and the radicals R.sup.4 which are capable of substitution may furthermore be monosubstituted or polysubstituted by halogen, haloalkyl, haloalkoxy, alkyl, alkoxy, alkoxycarbonyl, --OH, .dbd.O, --COOH or salts of this, --NO.sub.2 or --CN, have a nitrification-inhibiting action. Substances where R.sup.4 is not hydrogen when n is 0 are novel.

Abstract: A process for the preparation of polycyclic nitrogen-containing compounds of the formula ##STR1## where R is hydrogen or an organic radical, wherein a compound of the formula ##STR2## where Alk is alkyl of 1 to 4 carbon atoms and R has the above meanings, is reacted with a solution of an alkali metal hydroxide or of calcium hydroxide and the product is then oxidized.

Abstract: Diazatricyclononene compounds of the formula ##STR1## and their intermediates, i.e. norbornane compounds of the formula ##STR2## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, A and n have the meanings given in the claims and in the description, their preparation and their use as plant protection agents or plant growth regulators.

Abstract: 1-Pyrazolyl-phosphoric acid esters of the formula ##STR1## their preparation and use as crop protection agents, and their immediate precursors, i.e. halogenated 1-hydroxypyrazoles of the formula ##STR2## where R.sup.1 to R.sup.5, X and Y have the meanings given in the claims and description.

Abstract: 1-Pyrazolyl-phosphoric acid esters of the formula ##STR1## their preparation and use as crop protection agents, and their immediate precursors, i.e. halogenated 1-hydroxypyrazoles of the formula ##STR2## where R.sup.1 to R.sup.5, X and Y have the meanings given in the claims and description.

Abstract: A process for the safe supply of molecular oxygen or gas containing molecular oxygen to an oxidation of hydrocarbons in the liquid phase, wherein, immediately before the point of entry into the liquid hydrocarbon, the oxygen, or gas containing oxygen, to be supplied is at least 20.degree. C. colder than the hydrocarbon, and wherein, as soon as the oxygen, or gas containing oxygen, which is to be supplied exceeds the predetermined temperature at the supply orifice, the supply ceases.

Abstract: A process for the preparation of high molecular weight polyphenylene ethers from monohydric phenols which have alkyl substituents in both ortho-positions and may additionally have an alkyl substituent in one meta-position but not in the para-position, by an oxidative coupling reaction, employing oxygen, at from 10.degree. to 25.degree. C., in the presence of a catalyst complex comprising a copper salt and an N-substituted imidazole, in the presence of an aromatic C.sub.8 -C.sub.10 -hydrocarbon solvent.N-Methylimidazole, N-ethylimidazole, N-isopropylimidazole, N-n-butylimidazole, N-cyclohexylimidazole, N-octylimidazole and N-phenylimidazole are preferably used as the imidazole, advantageously in amounts of from 0.5 to 5 percent by weight.

Abstract: A process for the simultaneous preparation of pyrazole and triazoles by reacting a triazoline compound with a basic compound and then oxidizing the product with hydrogen peroxide.The triazoles and pyrazole obtainable by the process of the invention are valuable starting materials for the preparation of dyes, pesticides and drugs.

Abstract: 1-Hydroxypyrazole and a process for its preparation by conversion of isoxazolineazoxy compounds at 140.degree.-600.degree. C.The end products obtainable by the process of the invention are valuable starting materials for the preparation of dyes, crop protection agents and drugs.

Abstract: New and valuable polycyclic compounds which contain nitrogen-containing rings and have a strong action on plants, agents for influencing plant growth containing these compounds, and a method of influencing plant growth with these compounds.

Abstract: New and valuable polycyclic compounds which contain nitrogen-containing rings and have a strong action on plants, agents for influencing plant growth containing these compounds, and a method of influencing plant growth with these compounds.

Abstract: New and valuable polycyclic compounds which contain nitrogen-containing rings and have a strong action on plants, agents for influencing plant growth containing these compounds, and a method of influencing plant growth with these compounds.

Abstract: Tricyclic nitrogenous compounds having strong plant growth regulating properties are disclosed. The compounds display the general formula ##STR1## wherein A is one of several nitrogen-containing radicals, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are selected from various recited aliphatic, aryl, araliphatic and heterocyclic groups. R.sup.3 and R.sup.4 may also together form one of a number of nitrogen, sulfur and oxygen containing radicals. These compounds have a variety of uses, including the reduction of plant growth height without harm to the plant.

Abstract: New and valuable polycyclic compounds which contain nitrogen-containing rings and have a strong action on plants, agents for influencing plant growth containing these compounds, and a method of influencing plant growth with these compounds.

Abstract: New and valuable polycyclic compounds which contain nitrogen-containing rings and have a strong action on plants, agents for influencing plant growth containing these compounds, and a method of influencing plant growth with these compounds.

Abstract: Recovery of pure propylene oxide from propylene oxide which is contaminated by C.sub.6 hydrocarbons and methyl formate, by distillation with the addition of more methyl formate so that the amount of methyl formate is four times that of the 2-methylpentane present.