Issue 27, 2015

Synthesis and structural characterization of six Cu(ii)-based coordination polymers using the thermally tunable 1,2,3,4-cyclobutanetetracarboxylic acid

Abstract

The synthesis and structural characterization of new six Cu(II) coordination polymers of formulae {[Cu2(ctc-cbut)(H2O)4]·2(H2O)}n (1), {[Cu5(ctc-cbut)2(OH)2(H2O)8]·7(H2O)}n (2), {[Cu2(ctc-Hcbut)(OH)(H2O)2]·4(H2O)}n (3), [Cu2(ttt-cbut)(H2O)4]n (4), {[Cu2(ttt-cbut)(H2O)4]·4(H2O)}n (5) and {[Cu4(ttt-cbut)2(H2O)2]·3(H2O)}n (6) (ctc-H4cbut = cis,trans,cis-1,2,3,4-cyclobutanetetracarboxylic acid and ttt-H4cbut = trans,trans,trans-1,2,3,4-cyclobutanetetracarboxylic acid), have been carried out, together with a computational study of the electronic and thermal free energies of the four isomers of the given ligand. The compounds 1–3 exhibit the ligand in its commercial cis,trans,cis conformation while 4–6 were synthesized with the trans,trans,trans isomer, after thermal treatment of the ctc-isomer. The topology of the six complexes synthesized have differences in dimensionality: compound 4 shows a one-dimensional topology, compound 3 presents a 2D-topology with a three nodal 4,4,4-c network, while 1, 2, 5 and 6 exhibit a 3D-topology with a binodal network 3,6-c for 1 and [412·612·84] [46]-flu for 2. Compound 5 presents a triply interpenetrated [66]-dia network while 6 exhibits a three-nodal network with [43][44·62][47·610·84] point symbol.

Graphical abstract: Synthesis and structural characterization of six Cu(ii)-based coordination polymers using the thermally tunable 1,2,3,4-cyclobutanetetracarboxylic acid

Supplementary files

Article information

Article type
Paper
Submitted
12 Feb 2015
Accepted
26 May 2015
First published
26 May 2015

CrystEngComm, 2015,17, 5081-5093

Author version available

Synthesis and structural characterization of six Cu(II)-based coordination polymers using the thermally tunable 1,2,3,4-cyclobutanetetracarboxylic acid

P. Díaz-Gallifa, O. Fabelo, J. Pasán, L. Cañadillas-Delgado, M. A. Ramírez, A. G. Gallardo and C. Ruiz-Pérez, CrystEngComm, 2015, 17, 5081 DOI: 10.1039/C5CE00326A

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