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Luminescent Iridium-Terpyridine Complexes with Various Bis-Cyclometalated Ligands.
Molecules
January 2025
Department of Chemistry, Graduate School of Natural Science and Technology, Shimane University, 1060, Nishikawatsu, Matsue 690-8504, Shimane, Japan.
A series of luminescent bis-cyclometalated iridium complexes with 2,2':6',2″-terpyridine (tpy), [Ir()(tpy)]PF ( = 2-phenylpyridinate (ppy) for ; benzo[h]quinolinate (bzq) for ; 1-phenylisoquinolinate (piq) for ; and 2-phenylbenzothiazolate (pbt) for ), have been synthesized and structurally characterized. Single-crystal X-ray diffraction analyses reveal that the tpy ligands of - are coordinated to the iridium center in a bidentate fashion, and the uncoordinated pendant pyridine rings in the tpy ligands of - form intramolecular π-π stacking interactions with a phenyl moiety of ligands. In addition, the pendant pyridine ring in the tpy ligand of forms an intramolecular hydrogen bonding interaction, unlike in -.
View Article and Find Full Text PDFLigand-Induced Intramolecular Cuprophilic and Argentophilic Interactions in Bimetallic Cu(I) and Ag(I) Phosphine Complexes and the Assessment of Their Antityrosinase and Antibacterial Effects.
Inorg Chem
January 2025
Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, 3012 Bern, Switzerland.
Binuclear silver(I) and copper(I) complexes, and , with bridging diphenylphosphine ligands were prepared. In , the silver(I) center is located inside a trigonal plane composed of three phosphorus donors from three separate and bridging dppm ligands. The fourth coordination site is filled with neighboring silver(I) ions.
View Article and Find Full Text PDFHigh-Resolution NMR of the Hydrogenation Reaction with Parahydrogen in an Inhomogeneous Magnetic Field.
J Phys Chem Lett
January 2025
International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk 630090, Russia.
Nuclear magnetic resonance is extremely attractive for operando studies of chemical reactors. However, the heterogeneous catalyst particles placed inside an NMR probe greatly affect the uniformity of the magnetic field. This problem is especially acute when studying heterogeneous hydrogenation processes using parahydrogen.
View Article and Find Full Text PDFEthyl 4-[(2-hy-droxy-eth-yl)amino]-2-(4-meth-oxyphen-yl)-1-methyl-5-oxo-2,5-di-hydro-1-pyrrole-3-carboxyl-ate.
IUCrdata
December 2024
EaStCHEM School of Chemistry, University of St Andrews, St Andrews, Fife KY16 9ST, United Kingdom.
In the title compound, CHNO the pyrrolidine ring is almost planar and subtends a dihedral angle of 85.77 (7)° with the pendant phenyl ring. An intra-molecular N-H⋯O hydrogen bond generates an (6) loop.
View Article and Find Full Text PDFCrystal structures of (±)-(1,5,6,7,10,11,13,14,15,16)-13-acet-oxy-16-benzyloxy-15-hy-droxy-7-meth-oxy-meth-oxy-3-oxo-11,15,18,18-tetra-methyl-2,4-dioxa-tetra-cyclo[12.3.1.0.0]octa-decan-10-yl benzoate and its 13-epimer.
Acta Crystallogr E Crystallogr Commun
January 2025
Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223-8522, Japan.
The title compounds, CHO ( and ), are tetra-cyclic benzoates composed of a taxane ring with a fused dioxolane ring as the core skeleton. In compound , the five-membered dioxolane ring is essentially planar while the two cyclo-hexane rings and the cyclo-octane ring adopt chair and chair-chair forms, respectively, and there are three intra-molecular H⋯H short contacts. The corresponding ring conformations in are similar; however, one intra-molecular C-H⋯O inter-action and two H⋯H short contacts are observed, and the benzoyl and meth-oxy-methyl groups show orientational disorder.
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