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Syntheses and crystal structures of cadmium(II)X2-hexamethylenetetramine (X = Br-/I-/SCN-) coordination polymers having different dimensionality
A BANERJEE, P MAITI, T CHATTOPADHYAY, K S BANU, M GHOSH, E SURESH, E ZANGRANDO, D DAS,
Published in -
2010
Volume: 29
   
Issue: 3
Pages: 951 - 958
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. © 2009 Elsevier Ltd. All rights reserved.
About the journal
JournalPolyhedron
Publisher-
ISSN0277-5387