Evidence for anchimeric assistance by the Cp2ZrCl-group in the homolytic cleavage of an OCH3 bond

Anchimeric assistance by a transition metal in the homolysis of a CO bond is discussed for the thermal rearrangement of methyl(zirconocenyidiphenylmethyl)ether $\text{1c}$.     

The combinatorial map color theorem

This paper is written in the spirit of the author's book: Map Color Theorem (1974). We try to develop the Map Color Theorem in a combinatorial way, circumventing the unwieldy embedding theory. Similar (but not identical) generalizations have recently and independently been developed by Alpert (in press) and by Stahl (in press). The first nine theorems are one-dimensional versions of known facts from the theory of two-dimensional compact manifolds. Theorems 10 to 13 are to my knowledge completely new results.     

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.     

Über die Synthese von substituierten 1,3-Dihydro-5-(2-pyridyl)-thieno[2,3—e]-1,4-diazepin-2-onen

The preparation of the title substances as well as their chlorination in position 7 and methylation in position 1 are described.     

Search for an effect of the ionic charge on the Coulomb capture of muons in Cu,CuSCN and Cu(SCN)2

Muonic Lyman series intensities and Coulomb capture ratios have been measured for CuSCN and Cu(SCN)₂, and the Cu Lyman series intensities also for Cu metal. No effect due to the ionic charge was found.