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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• 作者：Susobhan Biswas ; Saikat Sarkar ; Ian M. Steele ; Sougata Sarkar ; Golam Mostafa ; Bijali Bikash Bhaumik ; Kamalendu Dey
• 关键词：Thiohydrazone ligand ; Supramolecular assembly ; Hydrogen bonding ; C– ; H ; //www.sciencedirect.com/scidirimg/entities/22ef.gif"" alt=""cdots ; three dots ; centered"" border=0>π ; dimer ; CH₃ ; //www.sciencedirect.com/s
• 刊名：Polyhedron
• 出版年：2007
• 出版时间：30 October 2007
• 年：2007
• 卷：26
• 期：17
• 页码：5061-5068
• 全文大小：1098 K

文摘

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–HO and O–HN hydrogen bonding and also forms a two-dimensional supramolecular dimer, having C–Hπ synthons. Intermolecular C–HO and O–HO 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.