Abstract: The invention relates to novel polysilazanes, the preparation thereof, the further processing thereof to form silicon nitride-containing ceramic material, and this material itself. In order to prepare the polysilazanes, dialkylaminoorganyldichlorosilanes of the formula RsiCl.sub.2 -Nr'R' are reacted with ammonia. The polysilazanes can then be pyrolyzed to form silicon nitride-containing ceramic material. The polysilazanes according to the invention dissolve in customary aprotic solvents.

Abstract: The invention relates to novel polymeric hydridosilazanes, processes for their preparation and their use for the preparation of ceramic material containing silicon nitride. To prepare the polymeric hydridosilazanes, polymeric hydridochlorosilazanes are reacted with NH.sub.3. To prepare the ceramic material containing silicon nitride, the polymeric hydridosilazanes are then pyrolyzed.

Abstract: The invention relates to rhodium complexes of the formula[A--O--(CH.sub.2 CH.sub.2 O).sub.n --A].sup.2+ 2 X.sup.- Iaand[A--O--(CH.sub.2 CH.sub.2 O).sub.m --CH.sub.3 ].sup.+ X.sup.-Ibin whichn=5-1,000,m=5-250,X.sup.- denotes a tetrafluoroborate, hexafluorophosphate or per-chlorate anion,A denotes a radical of the formula ##STR1## (en).sub.2 denotes two molecules of a monoolefin or one molecule of a diolefinAr denotes phenyl or phenyl which is substituted by one or two alkyl groups having 1 or 2 carbon atoms andR.sup.1 denotes an arylene or alkylene bridge, and their use for the preparation of L-phosphinothricin and its derivatives by enantioselective catalytic hydrogenation of 2,3-dehydrophosphinothricin (derivatives).

Abstract: The invention relates to compounds of the general formula ##STR1## in which R.sup.1 represents Hal or C.sub.1 -C.sub.3 -alkyl and Hal reprsents a halogen having an atomic weight of 35 to 80.The invention also relates to a process for the preparation of such compounds by reacting a compound of the general formula II ##STR2## in which R.sup.2 represents C.sub.1 -C.sub.3 -alkyl or OR.sup.3 and R.sup.3 represents C.sub.1 -C.sub.8 -alkyl, preferably C.sub.1 -C.sub.3 alkyl, with an acid chloride of the formula MHaL.sub.2 (III), in which M represents SO, CO or PHal.sub.3 and Hal represents a halogen having an atomic weight from 35 to 80, and in which the reaction, if M is Co, is carried out in the presence of a catalyst which is customary for the phosgenation of diesters of phosphonic acid.Finally the invention relates to alkyl esters of cyanomethyl-methylphosphinic acid, i.e. to products of the formula II in which R.sup.2 is a methyl group and R.sup.3 is an alkyl group of 1 to 6 carbon atoms.

Abstract: A process for the production of dialkyl esters of vinyl phosphonic acid which comprises subjecting dialkyl esters of 2-acetoxyethane phosphonic acid to cleavage by contacting with a liquid catalytically acting medium at a temperature in the range from 150.degree. to 270.degree. C. and under a pressure such that the partial pressures of the total of the components of the reaction system is in the range from 1 to 500 mbar, and drawing off the resulting dialkyl esters of vinyl phosphonic acid and other volatile reaction products.

Abstract: Aromatic phosphorus-chlorine compounds, especially diphenylphosphinyl chloride (C.sub.6 H.sub.5).sub.2 P(O)Cl, phenylphosphonyl dichloride C.sub.6 H.sub.5 P(O)Cl.sub.2, dichlorophenylphosphine C.sub.6 H.sub.5 PCl.sub.2 and chlorodiphenylphosphine (C.sub.6 H.sub.5).sub.2 PCl, and the corresponding sulfur analogs, are obtained by reaction of aromatic phosphorus compounds, which contain oxygen or sulfur, of the formula I ##STR1## in which X=O or S, and m=1, 2 or 3, with phosphorus-chlorine compounds of the formula II(C.sub.6 H.sub.5).sub.3-n P Cl.sub.n (II)in which n=1, 2 or 3, at temperatures between about 330.degree. and 700.degree. C. Preferred starting materials are triphenylphosphine oxide (C.sub.6 H.sub.5).sub.3 PO and phosphorus trichloride PCl.sub.3.The reaction products are mainly intermediates in a variety of special areas, such as the pharmaceuticals, plant-protection, dye and polymer sectors.

Abstract: A process for the preparation of aminocarbonyl acids of phosphorus of the general formula I ##STR1## wherein R.sup.1 means OH or C.sub.1 -C.sub.3 -alkyl which comprises reacting a cyano halide of phosphorus of the general formula II ##STR2## with at least the stoechiometric amount of water, in formula II R.sup.2 meaning a halogen having an atomic weight in the range of from 35 to 80 or C.sub.1 -C.sub.3 -alkyl and Hal being a halogen having anatomic weight in the range of from 35 to 80.

Abstract: A reaction product of (A) compounds containing at least two R.sup.1 R.sup.2; C.dbd.CR.sup.3 --X groups (I) with (B) compounds which contain(a) at least two active H atoms or(b) at least two groups containing active H atoms of the type --AH-- (II) or(c) at least one active H atom and at least one group of the type (III),or which form the corresponding amount of this group (II), in which, the formula (I),X denotes --CO-- which is attached to a further R.sup.1 R.sup.2 C.dbd.CR.sup.3 group either directly or via the radical of a polyhydric alcohol or of an amine,R.sup.1 denotes hydrogen or a hydrocarbon radical having 1 to 10, preferably 1 to 4, carbon atoms, such as alkyl, phenyl, benzyl or naphthyl,R.sup.2 denotes hydrogen, a hydrocarbon radical having 1 to 10, preferably 1 to 4, carbon atoms, such as alkyl, phenyl, benzyl or naphthyl, an ester group containing the radical R.sup.4 of a monohydric alcohol having up to 12 carbon atoms, --CN, --NO.sub.2 or a CO--NHR.sup.1 or CO--R.sup.1 group, andR.sup.

Abstract: Compounds of the general formula ##STR1## wherein X and Y are the same or different and denote oxygen or sulfur,R.sub.1 is an ethylenically unsaturated aliphatic radical containing from 2 to 6 carbon atoms, andR.sub.2 is a saturated aliphatic radical containing from 1 to 6 carbon atoms or an aryl radical containing from 6 to 10 carbon atoms,are intermediate products used for the preparation of photocrosslinkable polymers with lateral (thio)phosphinyl(thio)urethane groups or (thio)phosphinyl(thio)urea groups, which polymers are useful in photosensitive mixtures and recording material.

Abstract: A photosensitive mixture that contains a photosensitive compound, for example, a photoinitiator or a diazo compound, and a reaction product of a polymer containing active hydrogen with an olefinically unsaturated compound represented by the formula ##STR1## wherein X and Y are the same or different and denote oxygen or sulfur,R.sub.1 is an olefinically unsaturated aliphatic radical containing 2 to 8 carbon atoms andR.sub.2 is a saturated aliphatic radical containing 1 to 8 carbon atoms or an aryl radical containing 6 to 10 carbon atoms,is suitable for producing photoresists and printing plates.

Abstract: A compound of the formula I, ##STR1## in which X is F, Cl or Br,R is alkyl having from 1 to 5 carbon atoms, aryl, aryloxy or aralkyl andn is an integer from 1 to 5, a plurality of R representing equal or different of said substituents and a process for preparing them.

Abstract: Preparation of alkanephosphonous acids of the formula ##STR1## in which R1 denotes alkyl, by reacting monoalkylphosphanes of the formulaR1--PH.sub.2 (II)with H202 in a solution containing hydrochloric acid.

Abstract: A photosensitive mixture contains a photosensitive compound and a polymeric binder which s a reaction product of a compound represented by the formula ##STR1## wherein X and Y are the same or different, and each denotes oxygen or sulfur,R.sub.1 and R.sub.2 are the same or different, and each denotes an unsubstituted or substituted alkyl, cycloalkyl or alkoxy radical containing from 1 to 6 carbon atoms; an unsubstituted or substituted aryl or aryloxy radical containing from 6 to 10 carbon atoms; or, together with the phosphorus atom, a 5- or 6-membered heterocyclic ring which is unsubstituted or substituted or which carries a fused benzene ring,with a polymer containing active hydrogen. The novel binders used in the mixture can be easily prepared and yield photosensitive layers of good developability and developer resistance.

Abstract: Tertiary aromatic phosphine oxides of the formula ##STR1## in which X=F, Cl or Br, are prepared by Friedel-Crafts reaction of (a) phenylthiophosphonic dichloride with fluoro-, chloro-or bromobenzene, or(b) of dichlorophenylphosphine, sulfur and fluoro-, chloro-or bromobenzene, and(c) subsequent conversion of the phosphine sulfides produced by (a) or (b) using H.sub.2 O.sub.2 in a solvent which comprises at least about 2% by weight, preferably at least about 10% by weight, of optionally halogenated lower aliphatic carboxylic acids and/or their anhydrides and, if appropriate, of other inert solvents which are miscible therewith.The reaction products are final products and intermediates in various specialized fields, such as, for example, in the plant protection sector and the polymers sector.

Abstract: Novel alkanephosphonic monoester salts, preparation thereof and use thereof as spin finishes for textile fibersAlkylphosphonic monoester salts of the formula ##STR1## where R, if p=1, is alkyl, and, if p=4, a carbon atom, R.sup.1 denotes C.sub.1 -C.sub.4 -alkyl, A denotes C.sub.2 H.sub.4 and/or C.sub.3 H.sub.7, m denotes a number from 15 to 35, R.sup.2 denotes C.sub.6 -C.sub.24 -alkyl, n denotes a number from 0 to 15, and p denotes 1 or 4 . These compounds are suitable for use as spin finishes for textile fibers and are distinguished by very good thermostability.

Abstract: A process for the production of a chloride of thiophosphinic acids which comprises reacting an anhydride of a phosphinic acid with thiophosphoryl chloride.

Abstract: Water-soluble copolymers containing a statistical distribution of 1-86% by weight of structural units of the formula ##STR1## 9-80% by weight of units of the formula ##STR2## 5-90% by weight of units of the formula ##STR3## and up to a total of 30% by weight of one or more units of the formulae ##STR4## wherein R.sup.1 is alkyl having 1 to 4 carbon atoms;R.sup.2 and R.sup.5 independently of one another are each hydrogen or methyl;R.sup.3 and R.sup.4 independently of one another are each hydrogen, methyl or ethyl, or together R.sup.3 and R.sup.4 are trimethylene or pentamethylene;Y is a direct bond, phenylene or a moiety of the formula --CO--NH--C(CH.sub.3).sub.2 --CH.sub.2 --;X.sym. is H.sym. or a cation;and said copolymers are useful as dyestuff auxiliaries and leather retanning agents.

Abstract: Chloro(diphenyl)phosphine, (C.sub.6 H.sub.5).sub.2 PCl, is prepared by reaction of diphenylphosphinic acid chloride with triphenylphosphine at temperatures between about 300.degree. and about 600.degree. C. The initial P-O compound undergoes deoxygenation during the reaction.The product of the process is useful as an intermediate in various specialized areas such as the plant-protection and polymer sectors.

Abstract: A diagnostic agent for the visualization of RES-containing organs or of lymph vessels, containing .sup.99m Tc triphosphonates or tetraphosphonates in physiologic saline, and a process for their preparation.

Abstract: Tertiary aromatic phosphine sulfides of the formula ##STR1## wherein X=F, Cl or Br, are prepared by means of a Friedel-Crafts reaction of(a) PCl.sub.3 with benzene and--after the addition of sulfur--also with fluorobenzene, chlorobenzene or bromobenzene, or(b) PSCl.sub.3 with fluorobenzene, chlorobenzene or bromobenzene and subsequently also with benzene; Friedel-Crafts catalysts are Al halides, especially AlCl.sub.3.The products are used as end products and intermediates in a variety of areas, such as, for example, the sectors of plant protection and polymers.