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Crystal Structure of cis-[PtCl2(PyCN)2] (PyCN = 4-Cyanopyridine) Showing Temperature Dependent Single-Crystal-to-Single-Crystal Transformation

Author(s): Kazuhiro Uemura

Journal: Advances in Materials Physics and Chemistry
ISSN 2162-531X

Volume: 03;
Issue: 01;
Start page: 36;
Date: 2013;
Original page

Keywords: Platinum Complex | X-Ray Analysis | Crystal Structure | Phase Transition

Platinum mononuclear complex, cis-[PtCl2(PyCN)2] (1, PyCN = 4-cyanopyridine), has been synthesized and characterized by single-crystal X-ray analysis. Compound 1 crystallizes as yellow plates from the reaction of a mixture of K2PtCl4 and PyCN (=1:2) in H2O, that was left to stand at room temperature with the addition of Me2CO. Compound 1 forms the square-planar coordination geometry around the Pt atom coordinated to two Cl– ions and two pyridines of PyCN ligands in cis position. Single crystal of 1 shows the temperature dependent phase transition around 140 K, where the crystal space groups change from P21/c (high temperature) to  (low temperature), which is caused by the stabilization of intermolecular interaction.
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