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The ternary title complex (2) is readily obtained by co-crystallization of 18-crown-6 (18C6) and di(4-carboxybenzenesulfonyl)amine (1) from hot water and was characterized by low-temperature X-ray diffraction. The crystal structure (triclinic, space group P1̄) displays one-dimensional polymeric sequences [(H 2 O) 2 ···18C6···(H 2 O) 2 ···{HN(SO 2 C 6 H 4 -4-COOH) 2 } 2 ] in which the molecules are associated through seven independent hydrogen bonds. The 18C6 ring lies on a crystallographic inversion centre and adopts the common pseudo-D 3d  conformation. On both sides, the ring is flanked by a strongly hydrogen-bonded water dimer H 2 O-H-OH. This species forms three weak O-H-O bonds to alternating ether oxygen atoms and accepts a strong N-H-O bond from the adjacent acid dimer (1) 2 . The water dimers thus act as ideal donor-acceptor balancing links between the hexafunctional polyether and the monofunctional NH groups of the (1) 2  dimers. The (1) 2  dimer itself is formed by two symmetry related cyclic O-H···O interactions (both H disordered) of the well-known carboxylic acid dimer type. To this effect, molecule 1 adopts a folded, pseudo-C s  symmetric conformation with stacked carboxyphenyl groups.

zeitschrift für naturforschung b

Polysulfonylamine, XC [1] Carbonsäure-Dimere, Wasser-Dimere und 18-Krone-6-Moleküle als Baugruppen eines supramolekularen Kettenpolymers: Darstellung und Struktur von (CH 2 CH 2 O) 6  • 4H 2 O • 2HN(SO 2 C 6 H 4 -4-COOH) 2  / Polysulfonylamines, XC [1] Carboxylic Acid Dimers, Water Dimers and 18-Crown-6 Molecules as Building Blocks in a Supramolecular Chain Polymer: Synthesis and Structure of (CH 2 CH 2 O) 6  · 4H 2 O · 2HN(SO 2 C 6 H 4 -4-COOH) 2