Two-dimensional supramolecular assembly of phenylmercury(II) and cadmium(II) complexes with a tridentate thiohydrazone NNS donor ligand: Synthesis,coordination behavior and crystal structure |
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Authors: | Susobhan Biswas Saikat Sarkar Ian M. Steele Sougata Sarkar Golam Mostafa Bijali Bikash Bhaumik Kamalendu Dey |
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Affiliation: | 1. Department of Chemistry, University of Kalyani, Kalyani-741235, West Bengal, India;2. Department of Chemistry, Santipur College, Santipur-741404, West Bengal, India;3. Department of the Geophysical Sciences, The University of Chicago, USA;4. Department of Physics, University of Jadavpur, Kolkata, West Bengal, India |
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Abstract: | The reaction of phenylmercury(II) acetate and cadmium(II) acetate with a refluxed solution of diacetylmonoxime and morpholine N-thiohydrazide formed a novel phenylmercury(II) complex, [PhHg(Hdammthiol)] (1) and a cadmium(II) complex, [Cd(Hdammthiol)2] (2), respectively (where H2dammthiol is the thiol form of diacetylmonoximemorpholine N-thiohydrazone (Hdammth) formed by the condensation of diacetylmonoxime and morpholine N-thiohydrazide in the presence of phenylmercury(II) and cadmium(II) ions). The complexes were characterised by elemental analyses and spectral data (electronic, infrared and 1H NMR) and also by X-ray crystal structure analysis. The X-ray crystallography shows that the phenylmercury(II) complex attained a tricoordinated distorted T-shaped structure, while the cadmium(II) complex attained a trapezoidal bipyramidal geometry. The phenylmercury(II) complex forms a two-dimensional sheet via C–H?O and O–H?N hydrogen bonding and also forms a two-dimensional supramolecular dimer, having C–H?π synthons. Intermolecular C–H?O and O–H?O hydrogen bonding of the cadmium(II) complex forms a two-dimensional supramolecular sheet along the bc plane and posses an impressively short intermolecular C(sp3)?O(sp3) contact. |
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Keywords: | Thiohydrazone ligand Supramolecular assembly Hydrogen bonding C&ndash H?π dimer CH3?O interaction |
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