查看文章

Crystallization of Cd[S₂CN(iPr)CH₂CH₂OH]₂ from ethanol yields the coordination polymer [{Cd[S₂CN(iPr)CH₂CH₂OH]₂}·EtOH]_∞ (1) within 3 h. When the solution is allowed to stand for another hour, the needles begin to dissolve and prisms emerge of the supramolecular isomer (SI), binuclear {Cd[S₂CN(iPr)CH₂CH₂OH]₂}₂·2EtOH (2). These have been fully characterized spectroscopically and by X-ray crystallography. Polymeric 1 has 2-fold symmetry and features dithiocarbamate ligands coordinating two octahedral Cd atoms in a μ₂κ²-tridentate mode. Binuclear 2 is centrosymmetric with two ligands being μ₂κ²-tridentate as for 1 but the other two being κ²-chelating leading to square pyramidal geometries. The conversion of the kinetic crystallization product, 1, to thermodynamic 2 is irreversible but transformations mediated by recrystallization (ethanol and acetonitrile) to related literature SI species, namely …