On the Importance of Unprecedented Lone Pair–Salt Bridge Interactions in Cu(II)–Malonate–2-Amino-5-Chloropyridine–Perchlorate Ternary System
Citations Over TimeTop 10% of 2013 papers
Abstract
A Cu(II)-malonate complex with formula {(C5H6N2Cl)12[Cu(1)(C3H2O4)2][Cu(2)(C3H2O4)2(H2O)2][Cu(4)(C3H2O4)2][Cu(3)(C3H2O4)2(H2O)2](ClO4)4}n (1) [C5H6N2Cl = protonated 2-amino-5-chloropyridine, C3H4O4 = malonic acid, ClO4(-) = perchlorate] has been synthesized from purely aqueous media simple by mixing the reactants in their stoichiometric ratio, and its crystal structure has been determined by single-crystal X-ray diffraction. In 1, copper(II) malonate units form infinite 1D polymeric chains, which are interlinked by hydrogen bonds to generate 2D sheets. These 2D sheets are joined side by side primarily by various hydrogen bonds to form a 3D structure. A multitude of salt bridges are formed in this structure, connecting the protonated 2-amino-5-chloropyridines and the malonate ligands of the polymeric polyanion. Examining this characteristic of the solid-state architecture, we noticed several salt-bridge (sb)···π interactions and an unexplored interaction between the lone pair (lp) of one malonate oxygen atom and a planar salt bridge. The combination of this interaction with various other weak intermolecular forces results in a remarkably extended supramolecular network combining a wide variety of interactions involving π-systems (Cl···π, π···π) and salt bridges (sb···π and lp···sb). We describe the energetic and geometric features of this lone pair-salt-bridge interaction and explore its impact on the resultant supramolecular organization using theoretical DFT-D3 calculations.
Related Papers
- → Estimating ternary viscosity in terms of Moelwyn-hughes' model(2001)11 cited
- → Acoustic Determination of the Critical Surfaces in the Ternary Systems CO2 + CH2F2 + CF3CH2F and CO + C2H4 + CH3CHCH2 and in Their Binary Subsystems(1997)36 cited
- → Vapour—liquid equilibria. V. The ternary system carbon tetrachloride—methanol—chloroform at 303.15 K(1990)15 cited
- → Vapour—liquid equilibria. IV. The ternary system carbon tetrachloride—methanol—chloroform at 293.15 K(1988)13 cited
- BINARY AND TERNARY ION EXCHANGE EQUILIBRIA——II. UO_2~(2+) -Na~+-H~+ TERNARY CATION EXCHANGE EQUILIBRIA(1987)