«Template»-Reaktionen I. Herstellung von tricyclischen und tetracyclischen Metallkomplexen aus aromatischen 1,2-Diaminen und 1,3-Dicarbonylverbindungen

The condensation of 1,2-phenylenediamine 1 and 1,3-dicarbonyl compounds 2 in the presence of a divalent metal ion such as Ni²⁺, Cu²⁺, Co²⁺, yields the tricyclic 4 or tetracyclic complexes 5 . The yields of these one step template reactions is very high in a large number of examples with differently substituted diamines 1 and 1,3-dicarbonyls 2 .     

Bei der Auftrennung von Gemischen aus aliphatischen Monoaminen, Diaminen oder Polyaminen

Ohne Zusammenfassung     

Herstellung und Eigenschaften von Aluminiumaquoxid. II. Böhmit aus Natriumaluminat und Salpetersäure

Preparation and Properties of Aluminium Hydroxide. II. Boehmite from Sodium Aluminate and Nitric Acid A report is given on the physical-chemical characteristics of aluminium hydroxide which contain mainly boehmite, having been obtained by continuous precipitation from sodium aluminate solution with nitric acid using technical raw materials and conditions being very similar to those applied in production. The influence of the reaction conditions (pH value, temperature, concentration and residence time in the precipitation suspension) on the chemical composition, structure and texture of the hydrogels is studied. With rising precipitation temperature the pH range extends, within which already after short residence times pure-phase, relatively well crystalline boehmite hydrogels are obtained in the precipitated solution.     

Einen Beitrag zur spektralphotometrischen Bestimmung der enzymatischen Oxydation von aliphatischen Diaminen

Ohne Zusammenfassung     

Poly-N-carbonyl- und -N-sulfonyl-guanidine aus N-Dichlormethylencarbonsäureamiden bzw. N-Dichlormethylen-sulfonamiden und Diaminen

Zusammenfassung Poly-N-carbonyl- und Poly-N-sulfonyl-guanidine wurden durch Zwischenphasenpolykondensation aus N-Dichlormethylen-carbons?ureamiden bzw. N-Di-chlormethylen-sulfonamiden und Diaminen hergestellt. Die Viskosit?ten und Erweichungsbereiche der Polymeren wurden bestimmt und ihre IR-Spektren mit entsprechenden niedermolekularen Modellverbindungen verglichen.

---

Summary Poly-N-carbonyl- and Poly-N-sulfonyl-guanidines were prepared by interfacial polycondensation of N-Dichloromethylenecarbonicacid-amides and N-Dichlor-methylene-sulfonicacid-amides respectively with diamines. The viscosities and softening points of the polymers were determined. Their IR-spectra were compared with those of low molecular weight modell compounds.

     

Herstellung von Aryl-isothiocyanaten aus Arylaminen und Bis-diäthylthiocarbamoylsulfiden

The preparation of aryl-isothiocyanates from aryl-amines and bis-diethylthiocarbamoyl sulfides is reported and mechanisms are proposed for these reactions of thiocarbamoyl derivatives.     

Herstellung und Eigenschaften von Aluminiumaquoxid. I. Böhmit aus Aluminiumnitrat und Ammoniakwasser

Preparation and Properties of Aluminium Hydroxide. I. Boehmite from Aluminium Nitrate and Ammonia The physical-chemical properties of mainly boehmite containing aluminium hydroxide are studied which were made by continuous precipitation from aluminium nitrate solution with ammonia liquor using technical raw materials and test conditions being very similar to those applied in production. The influence of the precipitation conditions (pH value, temperature, concentration and residence time in the precipitation solution) on the composition, structure and texture of the precipitation products is investigated and information about their effect on the filtration behaviour are given. In the case of a continuous precipitation it is possible to obtain phase-pure boehmite being relatively well crystallised. The crystallinity and dispersity of the precipitated hydroxide determine their filterability and the cavity structure.     

Synthese von Polyamiden aus aktiven Diestern von 3-Hydroxybenzothiophen-1,1-dioxid und Diaminen unter milden Bedingungen

Ohne Zusammenfassung     

Zur Massenspektrometrie von Metallkomplexen. Metallkomplexe von Corrinen und synthetischen Vorstufen

A variety of metal-complexes with Corrin-type macrocyclic ligands and synthetic precursors thereof are investigated by mass spectrometry. Analytical results are obtained from thermal reactions in the inlet system and from electron-impact-induced fragmentations. The former yield information concerning identity of small ligands in octahedral Co(III)-complexes, of anions in complex-salts and the possibility of thermal cyclisation of open ligands, the latter provide molecular weights, a means of type analysis and theoretically interesting modes of fragmentation. An unprecedented subsequent loss of up to seven methyl-groups is observed. Different fragmentation-mechanisms and the possible influence of metal-valency-changes and even- or odd-electron-ion-features are discussed. Some of the metals like Zn and Na seem to be able to form different types of metal-ligand-bonds.     

Die Herstellung von Glasfritten aus Pyrexglas

Ohne Zusammenfassung