Structures of ionic Di(arenesulfonyl)amides. 5. Lamellar layer structures of M[N(SO2C6H4-4-COOCH3)(2)] center dot nH(2)O (M = Na, n=1; M = K, n=0): Are there weak hydrogen bonds CH2-H center dot center dot center dot O=C between the layers? [German]

摘要

The new lamellar compounds NaN(SO2C6H4-4COOMe)(2). H2O (1a) and KN(SO2C6H4-4-COOMe)(2) (2a), obtained by neutralizing the corresponding strong NH acid with aqueous NaOH or KOH, were characterized by low-temperature X-ray diffraction (la: orthorhombic, space group Pbca, Z = 8, Z' = 1; 2a: orthorhombic, P2(1)2(1)2(1), Z = 8, Z' = 2). Both crystals are further examples of layered inorgano-organic solids where the inorganic component is comprised of metal cations, coordinating N(SO2)(2) groups and water molecules tin la) and the outer regions are formed by the 4-substituted phenyl rings of the folded anions, which approximate to mirror symmetry. In the two-dimensional networks, the cations adopt respectively a distorted octahedral [Na(OS)(4)(OH2)(2)], an irregular [K(1)O6N2], or an irregular [K(2)O-9] coordination. In contrast to the previously reported carboxylic congeners, where an extensive series of C-O-H . . .O=C hydrogen bonds is observed between layers, the esterified materials do not display any O-CH2-H . . .O=C interlayer bonding, although such interactions and short C-ar-H . . .O=C/O=S contacts exist within the lamellae. [References: 9]