First crystallographic report on a novel 2D layer of water pentagons: L5(7) water motif enclathrating [Co(cyclam)Cl-2]

作者：Jana Abhimanyu; Jana Atish Dipankar; Bhowmick Indrani; Mistri Tarun; Dolai Malay; Das Kalyan Kumar; Panja Anangamohan; Ali Mahammad^*

来源：Inorganic Chemistry Communications, 2012, 24: 157-161.

DOI：10.1016/j.inoche.2012.06.011

• Water-pentamer
• 2D-layer
• Boat-like structure
• [Co(cyclam)Cl-2]
• Reversible water adsorption
• PXRD studies

X-ray crystallographic study on [Co-II(cyclam)Cl-2]center dot 3H(2)O (cyclam=1,4,8,11-tetraazacyclotetradecane) reveals that the three water molecules form water pentamers, four of such adjacent water pentamers are fused together to form boat-shaped dodecamers (H2O)(12) which are further H-bonded to form 2D water layers. Between the successive water layers. H-bonded ID chains of [Co(cyclam)Cl-2] monomers are sandwiched and stacked along the crystallographic c-direction. Thermal studies reveal that the coordinated water molecules are strongly bound to the polymeric framework which can be thermally dehydrated and readsorbed, as evidenced by the PXRD studies of the parent, dehydrated and rehydrated forms of the complex.

• 出版日期2012-10