Preparation of open and closed forms of the lvt network with Cu(II) complexes of structurally related 1,2-diazole ligands (2014)
Type of ContentJournal Articles
PublisherUniversity of Canterbury. Chemistry
AuthorsHawes, C.S., Kruger, P.E.show all
Reported here are the synthesis and structural characterisation of two topologically related coordination polymers: [Cu(L1)(CH3CONH2)], 1, and [Cu(L2)(NMP)]$0.5NMP$0.5H2O, 2, (NMP ¼ N-methylpyrrolidinone) prepared from 1H-indazole-3-carboxylic acid, H2L1, and 1H-pyrazole-3-carboxylic acid, H2L2, respectively. Both 1 and 2 crystallise in the tetragonal space group I41/a and form 3-dimensional coordination polymers described by the lvt topology, in which [Cu2L2] dimers form four-connected nodes linked through carboxylate groups. Within 1 the presence of a Cu-bound acetamide molecule (formed in situ by the solvothermal hydration of acetonitrile) propagates hydrogen bonding between dimer units that, combined with the steric bulk of the indazole fragment, yield a closed (non-porous) framework. In 2, however, Cu-bound NMP, which does not participate in hydrogen bonding, coupled with the less bulky nature of the pyrazole-backbone, gives rise to an open framework of an otherwise isostructural network.
CitationHawes, C.S., Kruger, P.E. (2014) Preparation of open and closed forms of the lvt network with Cu(II) complexes of structurally related 1,2-diazole ligands. RSC Advances, 4, pp. 15770–15775.
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