Syntheses and crystal structures of cadmium(II)X2-hexamethylenetetramine (X = Br/I/SCN) coordination polymers having different dimensionality |
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| Authors: | Arpita Banerjee Pali Maiti Tanmay Chattopadhyay Kazi Sabnam Banu Manami Ghosh Eringathodi Suresh Ennio Zangrando Debasis Das |
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| Affiliation: | 1. Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700 009, India;2. Analytical Science Discipline, Central Salt and Marine Chemicals Research Institute, G.B. Marg, Bhavnagar 364 002, India;3. Dipartimento di Scienze Chimiche, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy |
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| Abstract: | Four new coordination polymers of cadmium(II) with hexamethylenetetramine (htm) have been synthesized and characterized by routine physicochemical techniques as well as by X-ray single crystal structure analysis. They are [CdBr(htm)(SCN)(H2O)2·CH3OH]n (1), [CdI(htm)(SCN)(H2O)2·0.5(CH3OH)]n (2), [Cd2(htm)3(SCN)4(H2O)]n·nH2O (3) and [Cd3Br6(htm)2(H2O)5·(htm)(H2O)6]n (4). Complexes 1, 2 and 3 exhibit 1D polymeric structure and complex 4 shows a 2D undulated layered arrangement, containing Cd6(htm)6 hexagonal units as building block, which extended to a 3D supramolecular architecture through hydrogen bonding. Thorough thermal investigation suggest that as far as the thermal stability of Cd(II)-htm bond is concerned it attains the maximum in complex 1 and minimum in complex 4. In case of complex 3 the thermal study inferred that CdS end product was obtained at ∼730 °C, whereas in case of other complexes the thermally stable end product remained unidentified. Solid state fluorescence study shows that all the complexes are luminescent at room temperature except complex 3. |
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| Keywords: | Coordination polymers Cadmium(II) Hexamethylenetetramine Crystal structure |
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