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Molecular Rectangles with Rod‐Shaped Disulfonic Acids
Author(s) -
Zitzer Christina,
Muesmann Thomas W. T.,
Hunfeld Karina,
Christoffers Jens,
Wickleder Mathias S.
Publication year - 2015
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201403171
Subject(s) - chemistry , triclinic crystal system , zinc , sulfonate , molecule , thermal decomposition , solvent , crystallography , stereochemistry , polymer chemistry , dimethylacetamide , coordination polymer , decomposition , crystal structure , organic chemistry , sodium
Polysulfonic acids and their compounds have been scarcely investigated, despite the huge knowledge that we have of the respective polycarboxylic acids and polycarboxylates. This is because of the limited availability of polysulfonic acids, for which reliable synthetic protocols are often lacking. Here, we present the first compound of the recently reported disulfonic acid 1,4‐bis(4‐sulfophenyl)butadiyne (H 2 DPBDS) prepared in our groups and a new compound of the commercially available 4,4′‐biphenyldisulfonic acid (H 2 BPDS). The zinc sulfonates [Zn 2 (BPDS) 2 (NMP) 6 ] · 2NMP [ I , NMP = N ‐methylpyrrolidone; triclinic, P $\bar {1}$ , Z = 2, a = 972.8(2), b = 981.5(2), c = 1915.2(2) pm, α = 87.73(3)°, β = 77.68(3)°, γ = 89.36(3)°, V = 1785.0(6) Å 3 ] and [Zn 2 (DPBDS) 2 (DMA) 6 ] · 2DMA [ II , DMA = dimethylacetamide; triclinic, P $\bar {1}$ , Z = 2, a = 973.79(2), b = 1347.53(2), c = 1411.08(2) pm, α = 110.531(1)°, β = 92.445(1)°, γ = 101.931(1)° V = 1683.11(5) Å 3 ] display rigid molecular rectangles constructed from two zinc atoms and two sulfonate ligands. The rectangles are assembled through weak interactions to form soft host lattices that incorporate the solvent DMA or NMP molecules, partly through Zn 2+ coordination. Thermal analysis shows that the solvent molecules can be completely removed without decomposition of the coordination polymers.