Bis(2,9-dimethyl-1,10-phenanthrolin-1-ium) hydrogen (S,S)-tartrate nonahydrate

Abstract

The asymmetric unit of the title compound, 2C14H13N2 +·2C4H5O6 −·9H2O, contains two cations and two anions in addition to nine mol­ecules of water. Each of the hydrogen tartrate anions is hydrogen bonded to itself by translation along [100] in a head-to-tail fashion via a short hydrogen bond with donor–acceptor distances of 2.473 (4) and 2.496 (4) Å. A large number of inter­molecular O–H⋯O, N—H⋯O and C–H⋯O hydrogen-bonding inter­actions, as well as π–π stacking [centroid–centroid distances in the range 3.642 (3) to 3.866 (3) Å], play an important role in the crystal structure.

Structural and spectroscopic studies of 2,9-dimethyl-1,10-phenanthrolinium cation (DPH) with chloride, triflate and gold dicyanide anions. The role of H-bonding in Molecular recognition and enhancement of - stacking

“…The level of counter anion involvement in H-bonding interaction appears to influence the -stacking in this system. In this regard, the network of H-bonding interaction found in 2 is important in bringing stability in the solid state morphology [13][14][15][16][17]. In 3 where the H-bonding interaction of the Au(CN) 2 anion lacks to induce interlayer or intra-layer interaction, cocrystallization of the neutral molecule induces the needed - stacking that influences the crystal morphology.…”

“…Due to the presence of low-energy * orbitals of the ligand, metal complexes can be characterized by strong metal-to-ligand charge-transfer (MLCT) absorption bands in the visible spectrum and hence a red-shifted fluorescent emission should be expected [11,12]. Many of the extraordinary molecular architectures such as catenanes, rotaxane and knots owe their appearance in the literature due to the coordinating properties of phen [13][14][15][16].…”