Showing papers by "Miquel Barceló-Oliver published in 2007"
TL;DR: In this article, a high-level ab initio study of anion−π interactions involving N9-methyl-adenine, N6methyl-adenine and N9methyl-hypoxanthine was performed and it was shown that these compounds are able to interact favorably with anions.
Abstract: In this manuscript we report a high-level ab initio study of anion−π interactions involving N9-methyl-adenine, N6-methyl-adenine, N9-methyl-hypoxanthine, a dimer of N9-methyl-adenine, and N9,N9‘-trimethylene-bisadenine. DNA bases like adenine are electron-deficient arenes that are well suited for interacting favorably with anions. We demonstrate that these compounds are able to interact favorably with anions. N9-Methyl-adenine, N6-methyl-adenine, and the dimer of N9-methyl-adenine interact with the anion via the six-membered ring more strongly than adenine due to cooperativity effects between the noncovalent π−π and anion−π interactions. This pattern, i.e., coexistence of π−π and anion−π bonding, is observed experimentally in the solid state. Finally, we report the solid-state characterization of two new compounds N6,N6‘-dimethylene-bisadenine hydrochloride and an outer-sphere complex of protonated N9,N9‘-trimethylene-bishypoxanthine with zinc tetrachloride anion, that exhibit interesting anion−π interact...
100 citations
TL;DR: In low-molecular-weight ternary complexes some recognition patterns are repeatedly observed as mentioned in this paper, such as long bonds between metal ions and nucleobases, hydrogen bonds between the amino group of amino acids and a carbonyl group of the nucleobas and vice versa.
79 citations
TL;DR: Cell culture, cell proliferation assays, cell cycle analysis, and electrophoresis indicate that the parent complex is a potential anticancer drug.
67 citations
TL;DR: In this paper, the synthesis and X-ray characterization of an N,N′-tetramethylenebis(2-aminopyrimidinium) tetrafluoroborate salt was reported.
28 citations
TL;DR: Two new compounds have been synthesized and structurally characterized and offer interesting recognition patterns that could have biological relevance: iodine–iodine short interactions, iodine–hydrogen(aliphatic or aromatic) interactions, iod–metal bonds, iodine.–π interactions (like C–H⋯π), and aromatic self-assemblies assisted by iodine atoms.
5 citations
TL;DR: Garcia-Raso, Frontera, and Deya as discussed by the authors studied the anion-π interaction in tetramethylenebis(2-aminopyrimidinium) tetrafluoroborate salt.
1 citations