Richtlinien und Bemerkungen der Redaktion und des Verlages für Abfassung von Manuskripten für die Zeitschrift für anorganische und allgemeine Chemie

Reaction of Trimethylsilylethers of Unsaturated Alcohols with Schwartz Reagent – Stabilisation of Cyclic Zirconiumorganic Compounds by the Moiety Cp₂ZrH₂ Besides the normal product of hydrozirconation the reaction of allyltrimethylsilylethers CH₂? CHC(R¹R²)OSi(CH₃)₃ ( I : R¹ = R² = H, VIII : R¹ = R² = CH₃, X : R¹ = H, R² = CH₃) with Cp₂Zr(H)Cl yields, as a result of a hydrogenation of the Si? O bond, trimethylsilane and a series of compounds with a Zr? O bond. Depending on the substitution of the α-C atom either dimeric chelates ( III ) or binuclear complexes of the type Cp₂Zr(Cl)CH₂CH₂C(R¹R²)OZr(Cl)Cp₂ ( IX : R¹ = R² = CH₃; XII : R¹ = H, R² = CH₃) are formed. Starting with X and excess Cp₂Zr(H)Cl the binuclear compound XIII is obtained which may be considered as an adduct of Cp₂ZrH₂ to the unsaturated chelate Compound XVII with a structure analogous to XIII is synthesized by the reaction of IX with Cp₂ZrH₂. The ¹H-NMR spectrum is in accordance with the existence of cis-trans-isomers of this complex.     

Richtlinien und Bemerkungen der Redaktion und des Verlages zur Abfassung von Manuskripten für die Zeitschrift für anorganische und allgemeine Chemie

Barogram of the System HgI₂? I₂ The barogram of the system HgI₂? I₂ is determined by total pressure measurements. From this is concluded the melting diagram and compared with results of references.