Contributions to the chemistry of organo-transition metal compounds. 51. Preparation and characterization of the organomanganese(III) compound Na[Mn(C5H5)4]

At reaction of Mn(acac)₃ with NaC₅H₅ in tetrahydrofuran solution Na[Mn(η¹?C₅H₅)_4?n(η⁵ -C₅H₅)_n] was obtained as a crystalline, red-violet, diamagnetic organomanganese(III) compound, which was characterized by n.m.r., i.r., and electronic spectra and by conductivity measurements.     

Über die dilatometrisch indizierten Titrationen

The possibility of shortening the titration time with dilatometrical titrations is demonstrated. It is shown with some chemical reaction types like neutralization, oxydation-reduction, precipitation and complex formation which have already been described. Using the Quick Test Method the accuracy of dilatometrical indication remains (standard deviation ca. 2.0‰). A definite number of features which relates to the way of carrying out dilatometrical titrations characterizes the Quick Test Method (e.g. the total titration time, number of points etc.). A development of the Quick Test Method was possible, because temperature influences do not diminish the accuracy of dilatometrical titrations.     

Structure elucidation of phase II metabolites by tandem mass spectrometry: an overview

The present paper provides a summary of the collision-induced dissociation of protonated and deprotonated phase II metabolites of drugs and pesticides. This overview is based on published literature and unpublished data from the authors. In particular, glutathione conjugates and their biotransformation products are discussed in detail. In addition, the fragmentation of the major classes of conjugates, i.e. glucuronides, glucosides, malonylglucosides, sulfates, acetates, methyl and glycine conjugates, is reported. Collision-induced dissociation, as studied by tandem mass spectrometry, allows the rapid identification of the type of conjugate, whereas the exact conjugation site can in general be determined only by additional NMR experiments.     

Antimykotisch wirksame Imidazolyl-alkene: Synthese und Röntgenstrukturanalyse von Omoconazol

Antimycotic Imidazolyl-alkenes: Synthesis and X-Ray Crystal Structure of Omoconazol The synthesis of omoconazol 4 from 2′,4′-dichloro-α-(1H-imidazol-1-yl)propiophenon ( 5 ) and 1-bromo-2-(4-chlorophenoxy)ethane ( 6 ) is described. Omoconazol, C₂₀H₁₇Cl₃N₂O₂, crystallises in the monoclinic space group P2₁/n, a = 14.329, b = 8.703, c = 16.791 Å, β = 105.75°. The crystal structure showed that omoconazol has the (Z)-configuration, in accordance with previous NMR results.     

Ordnen von Polyelektrolyten durch Ionendiffusion

Ohne Zusammenfassung     

Darstellung,Eigenschaften und Konstitution von Bis(dimethylaminopropyl)cadmium und -quecksilber

Synthesis, Properties, and Constitution of Bis(dimethylaminopropyl) Cadmium and Mercury It is reported about synthesis and properties of the bis[3-(N,N-dimethylamino)propyl] compounds of cadmium and mercury. The ¹³C-NMR spectrum of the cadmium compound indicates a spiranoid chelate structure. The concentration dependence of the coupling constants ¹³C? ¹⁹⁹Hg in case of (Me₂NCH₂CH₂CH₂)₂Hg and Me₂NCH₂CH₂CH₂Hg? i-C₄H₉indicates a partial Hg? N interaction.     

Beiträge zur Chemie der Alkylverbindungen von übergangsmetallen. XXXI. Darstellung und Eigenschaften von Benzylmangannitrosyl,C6H5CH2Mn(NO)

Contributions to the Chemistry of Transition Metal Alkyl Compounds. XXXI. Preparation and Properties of Benzyl Manganese Nitrosyl, C₆H₅CH₂Mn(NO) (C₆H₅CH₂)₂Mn reacts with NO with formation of dibenzyl and C₆H₅CH₂Mn(NO), which contains the manganese in the valence state 0. The manganese compound was characterized by elementary analysis, molecular weight, magnetic moment, ir-spectrum and the course of the thermal decomposition.