Kapillarstrukturen in ionotropen Gelen

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Darstellung und Charakterisierung von Iodoplatinaten MexNH4–xPtI4 (x = 2 − 4), gemischtvalenten Octaiododiplatinaten(II,IV) mit Pt2I8-Baugruppen

Preparation and Characterization of Iodoplatinates Me_xNH_4–xPtI₄ (x = 2–4), Mixed Valence Octaiododiplatinates(II,IV) with Pt₂I₈ Groups Iodoplatinates APtI₄ (A = Me_xNH_4–x with x = 2–4) have been prepared by partial oxidation of the correspondent hexaiododiplatinates(II) A₂Pt₂I₆ with I₂ in methanolic solutions. X-ray structure analyses of the bronze-coloured needle-shaped crystals of the compounds showed rows of dinuclear anions Pt₂I₈^2?, built up by edgesharing planar PtI₄ groups with Pt^II und octahedral PtI₆ groups with Pt^IV. The different space requirement of the cations leads to the formation of three different structures. Within the anion stacks weak intermolecular Pt^IV? I …? Pt^II interactions are detectable by Raman spectroscopy.     

Aluminiumalkyle mit Heteroatomen. III. Über Reaktionen von Titan(IV)-chlorid mit Tris(trimethylsilylalkyl)-aluminium-Verbindungen

Aluminium Alkyls with Heteroatoms. III. On Reactions of Titanium(IV) Chloride with Trimethylsilylmethyl Aluminium Compounds Trimethylsilylmethyl titanium trichloride can be obtained by reaction of titanium(IV) chloride with tris(trimethylsilylmethyl)aluminium diethyl ether (1:1). Its catalytic activity for polymerisation of butadiene has been investigated.     

Über die Spinnbarkeit kolloider Systeme

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Darstellung von Ferrocenyltriethylstannanen sowie elektronische Eigenschaften der substituierten Ferrocenylliganden

Synthesis of Ferrocenyltriethylstannanes and Electronic Properties of Substituted Ferrocenyl Ligands Ferrocenyltriethylstannanes of the type RSnEt₃ [R = Et₃SnC₅H₄FeC₅H₄, C₅H₅FeC₅H₃(2-CH₂NMe₂), C₅H₅FeC₅H₃(2-CH₂NC₅H₁₀), C₅H₅FeC₅H₃(2-CH₂OMe), MeOCH₂C₅H₄FeC₅H₄] were synthesized from Et₃SnCl and the corresponding ferrocenyl lithium derivatives. The compounds were characterized by elementary analyses, ¹H-, ¹³C-, ¹¹⁹Sn-n.m.r. and i.r. spectroscopic investigations. From the coupling constants ¹J(¹¹⁹Sn? ¹³C_Et) the electronic influence of substituted ferrocenyl ligands was estimated.     

Koordinationsverbindungen von Bortrialkylen. II. Zur Komplexbildung zwischen Bortriallylen und tertiären Aminen

Coordination Compounds of Boron Trialkyls. II. On the Complex Formation between Boron Triallyls and Tertiary Amines It is reported on complexes of triallyl, trimethallyl, and tricrotyl boron with N,N-,N′,N′-tetraethylethylene diamine, pyridine, and 2,2′-bipyridyl. Whilst only 1:1 complexes exist with pyridine, 1:1 and 2:1 complexes are formed with tetraethylethylene diamine. Bipyridyl reacts with triallyl boron with formation of the boronium salt [(all)₂B(dipy)][B(all)₄].     

Über die Darstellung und die Eigenschaften von σ-Organylwolframpentachloriden

Tungsten hexachloride reacts with dimethyl zinc or diphenyl zinc forming green methyl or phenyl tungsten pentachloride. However, tungsten hexachloride is reduced to tungsten tetrachloride on addition of zinc dialkyls with longer alkyl groups. Furthermore, alkyl tungsten pentachlorides can be prepared from tungsten hexachloride and tin tetraalkyls or boron trialkyls.