Über die Reaktion von Phosphorpentachlorid mit den BF3-Addukten sekundärer und tertiärer Amine

Reaction of F₃B · NH(CH₃)₂ with PCl₅ yields [(CH₃)₂NPCl₃][BCl₄] (I), which can also be obtained by reaction of [(CH₃)₂NBCl₂]₂ with PCl₅. In BF₃ · N(CH₃)₃ the fluorine atoms are exchanged with chlorine atoms, by PCl₅, ³¹P, ¹⁹F, and ¹¹B-NMR spectra of the reactions products are described and discussed.     

Zur Frage der Deprotonierung primärer und sekundärer Aminogruppen beim Kobaltieren von o-Hydroxy-o′-amino (bzw. alkyl-amino)-azofarbstoffen vom Typus Phenyl-azonaphtalin

Phenyl-azo naphthalene dyestuffs, which are substituted in o and in o′ position by hydroxy and amino (or alkylamino) groups, have been metallised with agents releasing either Co^II ions or Co^III ions, the 1:2 complexes formed being examined by means of electrophoresis and alkalimetric titrations. The amino or alkylamino groups are deprotonised only if they are in the naphthalene radical, or, if present in the benzene radical they are acidified by electrophilic substituents. Metallising with Co^II ions yielded usually 1:2 Co^III complexes. With one particular dyestuff, however, a 1:2 Co^II complex was obtained; it is assumed that this is due to a relatively lower oxidation potential of this dyestuff.     

Über cyclische tertiäre Arsine und sekundäre Arsenoxide

α,ω-Alkane-bis-diphenylarsines and -dimethylarsines, R₂AsC_nH_2nAsR₂, may be obtained from dichloroalkanes and sodium diorganyl-arsenides, R₂AsNa. The latter are prepared from tetraphenyl- and tetramethyl-diarsenic-sulphide, respectively, (R₂As)₂S. Elemental sodium eliminates on each As atom of the tetraphenyl-diarseno-alkanes one phenyl group, and on oxidation α,ω-alkane-diphenylarsenic acids are obtained. Reduction of these acids by means of SO₂ yields cyclic, secondary arsenic oxides, whereas H₃PO₂ gives cyclic arsines with As ? As bonds. Disodium-phenylarsenide, C₆H₅AsNa₂, prepared from (C₆H₅AsS)₄, reacts with longer dichloroalkanes to form cyclic tertiary phenylarsines which may contain, in addition to As, further heteroatoms such as N, O or S. Those arsines, which only contain carbon as the ring atoms, commutate with AsCl₃ to 1-chloro-arsolane and 1-chloroarsenane.     

Organische Phosphorverbindungen XXV Darstellung und Eigenschaften von sekundären und tertiären Phosphinsulfiden

Two new processes for the preparation of sec. phosphine sulfides which involve reaction of dialkylamino-dialkyl or diaryl phosphines with hydrogen sulfide, and of dialkylthionophosphonates, (RO)₂P(S)H, with GRIGNARD or organolithium reagents, respectively, are described. The addition of sec. phosphine sulfides to olefins and the condensation of sec. phosphine sulfides with N-hydroxymethyldialkylamines are reported. The conversion of tert. Phosphine sulfides to the corresponding tert. phosphine oxides is readily achieved with hydrogen peroxyde. The physical properties of several new unsymmetrical tert. phosphine sulfide and oxides are listed.     

Massenspektren von sekundären Vinylcarbinolen

The mass spectra of secondary vinylcarbinols of the structure R? CH(OH)? CH?CH₂ show the same fragments as those of the isomeric ethylketones R? CO? C₂H₅. This is the result of a rearrangement of the molecular ions of the vinylcarbinols to molecular ions of the ethylketones before fragmentation occurs. Compounds of the two classes differ only slightly from one another in the intensity values.     

Zur Darstellung von Lackmuspapier

Ohne Zusammenfassung     

Zur Darstellung von Lackmoid

Ohne Zusammenfassung     

Zur Darstellung von Methylendiaminderivaten

Ohne Zusammenfassung