CH/pi interactions between the coordinated acetylacetonato ligand and phenyl rings were analyzed in the crystal structures from the Cambridge Structural Database and by quantum chemical calculations. The acetylacetonato ligand may engage in two types of interactions: it can be hydrogen atom donor or acceptor. The analysis of crystal structures and calculations show that interactions with the acetylacetonato ligand acting as hydrogen atom donor depend on the metal in an acetylacetonato chelate ring; the chelate rings with soft metals make stronger interactions. The same trend was not observed in the interactions where the acetylacetonato chelate ring acts as the hydrogen atom acceptor.
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http://dx.doi.org/10.1021/ic051926g | DOI Listing |
Angew Chem Int Ed Engl
July 2024
Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario di Monte Sant'Angelo, Via Cintia, I-80126, Napoli, Italy.
The high-resolution X-ray structures of the model protein lysozyme in the presence of the potential drug [VO(acetylacetonato)] from crystals grown in 1.1 M NaCl, 0.1 M sodium acetate at pH 4.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
December 2023
Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario di Monte Sant'Angelo, Via Cintia, I-80126, Napoli, Italy.
High-resolution crystal structures of lysozyme in the presence of the potential drug V O(acetylacetonato) under two different experimental conditions have been solved. The crystallographic study reveals the loss of the ligands, the oxidation of V to V and the subsequent formation of adducts of the protein with two different polyoxidovanadates: [V O ] , which interacts with lysozyme non-covalently, and the unprecedented [V O (NO )] , which is covalenty bound to the side chain of an aspartate residue of symmetry related molecules.
View Article and Find Full Text PDFJ Biomol Struct Dyn
July 2024
Department of Chemistry, University of Sistan and Baluchestan, Zahedan, Iran.
Since the design of metal complexes with better biological activities is important, herein a new palladium(II) complex bearing en and acac (en and acac stand for ethylenediamine and acetylacetonato, respectively) as its ligands, [Pd(en)(acac)]NO complex, was synthesized and fully characterized. Quantum chemical computations of the palladium(II) complex were done DFT/B3LYP method. Cytotoxicity activity of the new compound on leukemia cell line (K562) was assessed MTT method.
View Article and Find Full Text PDFSmall
June 2023
School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD, 4072, Australia.
Molecular crystals displaying elastic flexibility have important applications in the fields of optoelectronics and nanophotonic technologies. Understanding the mechanisms by which these materials bend is critical to the design of future materials incorporating these properties. Based on the known elastic properties of bis(acetylacetonato)copper(II), a series of 14 aliphatic derivatives are synthesized and crystallized.
View Article and Find Full Text PDFChemistry
December 2022
Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan.
π-π Interactions are established as a powerful supramolecular tool, whereas the usability of CH-π interactions has been rather limited so far. Here we present (i) selective binding of planar polyaromatics and (ii) effective isolation of planar metal complexes by a polyaromatic capsule, utilizing multiple CH-π interactions. In the spheroidal cavity, one molecule of large and medium-sized polyaromatic molecules (i.
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