Polysulfonylamines, CXLII. A supramolecular monomer-dimer pair: Strong and weak hydrogen bonding in the crystal structures of pyridinium dimesylamide and 4,4 '-bipyridinediium bis(dimesylamide) [German]

摘要

In order to study packing arrangements and hydrogen bonding networks, low-temperature X-ray structures were determined for pyH(+)(MeSO2)(2)N- (M, orthorhombic, space group P2(1)2(1)2(1), Z'=1) and 4,4'-bipyH(2)(2+) . 2(MeSO2)(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 degrees. According to the packing architectures, D represents a supramolecular dimer of the monomeric congener M. In particular, the (MeSO2)(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 [(MeSO2)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) less than or equal to 270 pm and theta (C-H . . .O) greater than or equal to 115 degrees. [References: 28]