Cuprophilic interactions are observed between the two copper centers of the unprecedented dimer 2, the structure of which contains two associated [CuICl2]− ions. The surrounding complex is derived from the internal reduction of the CuII complex 1, which displays a cis‐divacant octahedral coordination geometry.

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A numerical method has been performed to explain and interpret oscillating convection phenomena in the vertical zone melting technique. The governing equations are solved in a cylindrical coordinate system using the finite volume method. The thermal boundary conditions were taken from experimental data. The aspect ratio ar was varied within the range of 1 5 ar 5 3. Two-dimensional calculations with application of parabolic boundary temperature show always steady axisymmetric behaviour of the convection. Only the three-dimensional calculation yields the transition to nonaxisymmetric, time-dependent (unsteady) flow. Furthermore the necessity of using thermal boundary conditions by a heat flux density q instead of a fixed parabolic temperature profile was demonstrated. The torus-like flow changes at ar = 1.45. . . 1.5 to a single roll flow pattern. This single roll shows an unsteady behaviour with increasing aspect ratios and Rayleigh numbers, respectively. The comparison of the numerical results with experimental data shows a good qualitative correlation. MSC (1991): 76R05

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Kontakte anderer Art: ausschließlich cuprophile Wechselwirkungen wurden im [CuICl2]−‐Dimer 2 nachgewiesen, das durch interne Reduktion des oktaedrischen CuII‐Komplexes mit annähernd unbesetzten cis‐Positionen, 1, entstand.