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In order to study packing arrangements and hydrogen bonding networks, low-temperature X-ray structures were determined for pyH + (MeSO 2 ) 2 N -  (M, orthorhombic, space group P2 1 2 1 2 1 , Z′ = 1) and 4,4′-bipyH 2  2+  ·  (MeSO 2 ) 2 N -  (D, monoclinic, C2/c, Z′ = 0.5). The structures consist of ionic formula entities assembled by N+-H···N -  hydrogen bonds; the dication in D displays crystallographic C 2  symmetry and has its two pyridyl moieties twisted by 43.9°. According to the packing architectures, D represents a supramolecular dimer of the monomeric congener M. In particular, the (MeSO 2 ) 2 N -  ions of the M structure are associated via short C(sp 3 ) - H···O contacts to form a diamondoid network, whereas in D a topologically congruent framework is constructed from weakly hydrogen-bonded [(MeSO 2 )N - ] 2  nodes. Hexagonal channels in the anion substructures each include two adjacent stacks of monomeric pyH +  or “dimeric” 4,4-bipyH 2  2+  cations that are linked to the channel walls by the strong hydrogen bond(s) and a set of short C ar -H···O contacts. All C - H···O taken into consideration have normalized parameters d(H···O) ≤ 270 pm and θ(C - H···O) ≥ 115°.

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Polysulfonylamine, CXLII [1]. Ein supramolekulares Monomer-Dimer-Paar: Starke und schwache Wasserstoffbrücken in den Kristallstrukturen von Pyridinium-dimesylamid und 4,4´-Bipyridindiium-bis(dimesylamid) / Polysulfonylamines, CXLII [1]. A Supramolecular Monomer-Dimer Pair: Strong and Weak Hydrogen Bonding in the Crystal Structures of Pyridinium Dimesylamide and 4,4´-Bipyridinediium Bis(dimesylamide)