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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Solvent- and heat-induced polymorphic transformation with single-crystal integrity in Cu(II) paddle wheel metal
Geetha Bolla1,2, Raghavender Medishetty3
1Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore. bolla.geetha25@gmail.com.
None:
We report the single-crystal-to-single-crystal (SCSC) transformation of the Cu(II) paddle wheel complex [Cu2(benzoate)4(24F-4spy)2] involving two novel polymorphs from form II to form I driven by both through solvent induced and thermal activation. In form I, the 24F-4spy ligands are aligned in a head-to-tail fashion, leading to photoreactivity, whereas form II is photostable. Single crystals of form II gradually transform into form I at room temperature, as confirmed by single-crystal X-ray diffraction and powder X-ray diffraction. In addition, two related Cu(II) paddle-wheel complexes, [Cu2(benzoate)4(26F-4spy)2] and [Cu2(benzoate)4(34F-4spy)2], are also described for comparison.
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