Abstract: A process for the preparation of 3,4-dichlorobenzotrihalides of the formula I ##STR1## where X is fluorine or chlorine, by reacting the corresponding 4-monochlorobenzotrihalides with chlorine gas in the presence of a catalytic amount of a Lewis acid, wherein the reaction mixture is recycled by means of a pump in a circulatory apparatus with static mixers and the amount of chlorine equivalent to the conversion of the corresponding 4-monochlorobenzotrihalide is introduced at 20.degree.-120.degree. C.

Abstract: Substituted diphenyl ethers of the formula ##STR1## where Z.sub.1, Z.sub.2 and Z.sub.3 are hydrogen, halogen, nitro, cyano, carboxyl, alkyl, haloalkyl, alkoxy, haloalkoxy, alkylmercapto, haloalkylmercapto, alkylsulfinyl, haloalkylsulfinyl, alkylsulfonyl or haloalkylsulfonyl, Z.sub.4 is hydrogen, cyano, alkyl, alkoxy, acetoxy or alkylmercapto, Y is hydrogen, halogen, cyano or nitro, X is oxygen, sulfur, sulfinyl or sulfonyl, and A is hydrogen, unsubstituted or substituted alkyl ##STR2## and can also be sulfonyl ##STR3## when X is oxygen, and, when Z.sub.4 is alkoxy or alkylmercapto, can also be a methylene chain --(CH.sub.2).sub.m -- by which the radicals Z.sub.4 --CH--X-- are bonded to form a ring, R.sub.1 is hydrogen, methyl, ethyl or n-propyl, R.sub.2 is cyano, methoxy, ethoxy or ##STR4## where B is OH, ONa, O--alkyl, unsubstituted or substituted phenoxy, --NH.sub.2, --NH--alkyl or --N(alkyl).sub.2, n is 1, 2 or 3, R.sub.3 and R.sub.

Abstract: Diphenyl ethers of the formula ##STR1## where Z.sup.1 is hydrogen or halogen, Z.sup.2 is halogen, R.sup.1, R.sup.2 and R.sup.3 are each hydrogen or alkyl, R.sup.4 is alkyl or an araliphatic radical and n is a number from 1 to 8, are used for controlling undesirable plant growth.

Abstract: 4,5-Dimethoxypyridazones of the formula ##STR1## where X and Y are each oxygen, sulfur, a sulfinyl group or a sulfo group, R.sup.1 and R.sup.2 and each hydrogen or alkyl, Z.sup.1, Z.sup.2 and Z.sup.3 are each hydrogen, halogen, nitro, cyano, alkyl, haloalkyl, alkoxy, haloalkoxy, alkylmercapto, haloalkylmercapto, alkylsulfinyl or alkylsulfonyl, n and p are each 0 or 1 and m and q are each 0 to 8, are used for controlling undesirable plant growth.

Abstract: Diphenyl ethers of the formula ##STR1## where Z.sup.1, Z.sup.2, and Z.sup.3 and R have the meanings given in the description, are used for controlling undesirable plant growth.

Abstract: Substituted 4,5-dimethoxypyridazones of the formula ##STR1## where R.sup.1, R.sup.2 and R.sup.3 independently of one another are each hydrogen, halogen, nitro, cyano, carboxyl, alkyl, haloalkyl, alkoxy, haloalkoxy, alkylmercapto, haloalkylmercapto, alkylsulfinyl or alkylsulfonyl and n is 0, 1 or 2, are used for controlling undesirable plant growth.

Abstract: Diphenyl ethers of the formula ##STR1## where Z.sub.1 and Z.sub.2 are each hydrogen, halogen, nitro, cyano, carboxyl, alkyl, haloalkyl or alkoxy, Z.sub.3 is halogen, nitro, cyano, alkyl, haloalkyl, alkoxy, haloalkoxy, alkylmercapto, haloalkylmercapto, alkylsulfinyl, haloalkylsulfinyl, alkylsulfonyl or haloalkylsulfonyl, Y is halogen, cyano or nitro, R.sub.1 is hydrogen, alkyl, cycloalkyl, alkoxy, haloalkyl or alkoxyalkyl, R.sub.2 is hydrogen, alkyl, acyl or an alkali metal atom and R.sub.3 is hydrogen, alkyl or an alkali metal atom, and herbicides containing these compounds.

Abstract: 1,3,5-Triazinones of the formula ##STR1## where R.sup.1, R.sup.2 and R.sup.3 have the meanings given in the description, are used for controlling undesirable plant growth.

Abstract: Silylalkyl thioalkanoates of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, Q and n have the meanings mentioned in the description, are used for controlling undesirable plant growth.

Abstract: 2H-1,2,4,6-Thiatriazine-1,1-dioxides of the formula I ##STR1## where R.sup.1, R.sup.2, R.sup.3 and Y have the meanings given in the description, are used for controlling undesirable plant growth.

Abstract: Diphenyl ethers of the formula ##STR1## where Z.sup.1, Z.sup.2 and Z.sup.3 independently of one another are each hyrogen, halogen, nitro, cyano, carboxyl, alkyl of 1 to 4 carbon atoms, or haloalkyl, alkoxy, haloalkoxy, alkylmercapto, haloalkylmercapto, alkylsulfinyl, haloalkylsulfinyl, alkylsulfonyl or haloalkylsulfonyl where alkyl is in each case of 1 to 4 carbon atoms, Y is hydrogen, halogen, cyano or nitro and Q is --CO--NA--OR.sup.1, where A is hydrogen, alkyl of 1 to 4 carbon atoms, a metal ion or an unsubstituted or substituted ammonium ion and R.sup.1 is carboxyalkyl, alkoxycarbonylalkyl or carbamylalkyl of not more than 10 carbon atoms, herbicides which contain these diphenyl ethers as active ingredients, and methods of controlling undesirable plant growth using these active ingredients.

Abstract: Substituted pyridazones of the general formula ##STR1## where R.sup.2 is halogen or alkoxy, R.sup.1 is amino, alkylamino, dialkylamino, alkoxyamino, alkylalkoxyamino, halogen, alkoxy, trimethyleneimino or acylated amino, X is unsubstituted or substituted phenoxy of the formula ##STR2## where R.sup.3, R.sup.4 and R.sup.5 are each, independently of one another, hydrogen, halogen, nitro, cyano, carboxyl, alkyl, haloalkyl, alkoxy, haloalkoxy, alkylmercapto, haloalkylmercapto, alkylsulfinyl or alkylsulfonyl and Y is hydrogen, cyano, haloalkyl, halogen or nitro, and herbicides which contain these compounds.

Abstract: 3,4,5,6-Tetrahydro-thiatriazine-3,5-dione-1,1-dioxides of the formula ##STR1## where R.sup.1, R.sup.2 and R.sup.3 have the meanings given in the main text, which possess herbicidal properties.

Abstract: Sulfamic acid halides and processes for the preparation of sulfamic acid halides by reaction of monosubstituted sulfamic acid halides with halogen compounds in the presence of specific amounts of a basic compound and in the presence of an organic solvent, if desired with subsequent treatment with water at a pH of at most 7. The compounds obtainable by the process of the invention, some of which are new, are valuable starting materials for the preparation of crop protection agents, dyes and drugs.

Abstract: Substituted N-benzoylanthranilic acid derivatives of the formula I ##STR1## and their anhydro compounds, of the formula II ##STR2## where R.sup.1 is substituted phenyl,R.sup.2 is hydrogen, nitro, cyano or halogen,X is hydrogen, halogen, nitro or cyano, or is alkyl, haloalkyl, alkoxy, haloalkoxy, haloalkylmercapto or alkylmercapto, each of 1 to 4 carbon atoms, andY is --OR.sup.6 or ##STR3## where R.sup.6 is hydrogen, or is alkyl, alkenyl or alkynyl each of up to 4 carbon atoms, or is one equivalent of an alkaline earth metal cation, of an alkali metal cation or of an ammonium ion which is unsubstituted or is substituted by alkyls of 1 to 4 carbon atoms, andR.sup.7 and R.sup.8 independently of one another are hydrogen or alkyl of 1 to 4 carbon atoms, herbicides containing these compounds, and processes for controlling undesired plant growth by means of these compounds.

Abstract: Novel O-substituted N-hydroxysulfamic acid halides and a process for their preparation by reacting sulfamic acids with acid halides in certain molar ratios. The compounds obtainable by the process of the invention are valuable materials for the preparation of crop protection agents, dyes and drugs.