Richtigstellung

Ohne Zusammenfassung     

Zur Kenntnis der Hexafluoromanganate(III)

The preparation of the up to now unknown compounds [Co(NH₃)₆]MnF₆, [Cr(NH₃)₆]MnF₆ and [Rh(NH₃)₆]MnF₆ is reported. The compounds crystallize in the space group T_h⁶–Pa3, with four formula units in a cell. The magnetic moment of [Co(NH₃)₆]MnF₆ has been measured (4,94 B.M.). The spectra of the above compounds and of K₃MnF₆ and K₂NaMnF₆ in the ultraviolet, visible and infrared region have been measured and discussed. The static distortion of MnF^3?₆ in K₃MnF₆ and K₂NaMnF₆ and a dynamic effect of the compounds with a complex cation due to the JAHN -TELLER theorem show two different types of infrared spectra.     

Zur Kenntnis des Natriumthioferrates(III)

The mixed valency compound Na₃Fe₂S₄, which is also formed in iron-sodium polysulfide melts, is oxidized and hydrated to NaFeS₂·H₂O (x ≈ 2) on air. It is shown by TGA that this hydrate loses the water reversibly between 80–140 °C. A crystal structure model for the water free phase NaFeS₂ is proposed (space group I 222,a=6.25 Å,b=10.83 Å,c=5.40 Å). The formation of NaFeS₂·xH₂O from Na₃Fe₂S₄ and the reversible phase transformation between NaFeS₂·xH₂O and NaFeS₂ are topotactic. Na⁺ ions in NaFeS₂·xH₂O are easily exchanged against K⁺, Rb⁺, Cs⁺, Tl⁺, Ca²⁺, Sr²⁺, and Ba²⁺. The high chemical reactivity of the sodium thioferrates is discussed and their crystal structures are compared with the other alkali metal thioferrate structures.     

Zur Bestimmung von Chlortetracyclin (Aureomycin)

Ohne Zusammenfassung     

Zur Identifizierung der Lokalanaesthetica (LA)

Ohne Zusammenfassung     

Zur Bestimmung von Cyanoferrat (II)

Ohne Zusammenfassung     

Zur Bestimmung von Titan(III)

Ohne Zusammenfassung     

Zur Darstellung von (Triorganosilylmethyl)-organophosphin-chalkogeniden

Synthesis of (Triorganosilymethyl)-organophosphine Chalkogenides Apart from the usual GRIGNARD method the preparation of compounds with the atom group is also possible in the way citated above. In the case [X = S] [R = me] twofold silylation occurs under the same conditions. Further metalation of C? H-bond is investigated.     

Zur Kenntnis von Natrium-hexafluoromanganat(III)

Sodium hexafluoromanganate(III) has been synthesized by heating equimolecular quantities of Na₂MnF₅ and NaF in argon atmosphere. The compound is monoclinic witha=5.56 (1) Å,b=5.84 (1) Å,c=8.10 (2) Å, =90.7 (2) andZ=2. It is a high spin complex with _eff and the deformation of the octahedra is evident from its IR-spectra. Two enantiotropic transitions (at 562 and 653°C) and the melting point at 800°C have been observed.

---

---

8. Mitt.: Mh. Chem.106, 483 (1975).     

Zur Kenntnis des Suprarenins (Adrenalins)

Ohne Zusammenfassung     

Zur Bestimmung von Paludrin (p-Chlorphenylisopropylbiguanidin)

Ohne Zusammenfassung