In the title compound, [Co(SO4)(C12H8N2)2]·C3H8O2, the Co(II) atom (site symmetry 2) has a distorted octa-hedral coordination composed of four N atoms from two chelating 1,10-phenanthroline ligands and two O atoms from an O,O'-bidentate sulfate ligand, in which the S atom has site symmetry 2. The dihedral angle between the two chelating N2C2 groups is 84.46 (15)°. The complex and solvent mol-ecules are connected through O-H⋯O hydrogen bonds. The solvent mol-ecule is equally disordered over two positions and is also located on a twofold axis.
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http://dx.doi.org/10.1107/S1600536812049616 | DOI Listing |
Angew Chem Int Ed Engl
January 2025
Texas A&M University, Chemistry, UNITED STATES OF AMERICA.
The functionalization of pyridines at positions remote to the N-atom remains an outstanding problem in organic synthesis. The inherent challenges associated with overriding the influence of the embedded N-atom within pyridines was overcome using n-butylsodium, which provided an avenue to deprotonate and functionalize the C4-position over traditionally observed addition products that are formed with organolithium bases. In this work, we show that freshly generated 4-sodiopyrdines could undergo transition metal free alkylation reactions directly with a variety of primary alkyl halides bearing diverse functional groups.
View Article and Find Full Text PDFEnviron Geochem Health
January 2025
College of Resource and Environmental Engineering, Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resource, Wuhan University of Science and Technology, Wuhan, 430081, People's Republic of China.
Cadmium (Cd) contamination in aquatic systems is a widespread environmental issue. In this study, a solid waste iron tailings and biochar hybrid (Fe-TWBC) was successfully synthesized derived from co-pyrolysis of peanut shell and tailing waste (Fe-TW). Characterization analyses showed that the metal oxides from solid waste iron tailings successfully loaded onto the biochar surface, with more functional groups in Fe-TWBC.
View Article and Find Full Text PDFACS Nano
January 2025
Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland.
Single-atom heterogeneous catalysts (SACs) are potential, recoverable alternatives to soluble organometallic complexes for cross-coupling reactions in fine-chemical synthesis. When developing SACs for these applications, it is often expected that the need for ligands, which are essential for organometallic catalysts, can be bypassed. Contrary to that, ligands remain almost always required for palladium atoms stabilized on commonly used functionalized carbon and carbon nitride supports, as the catalysts otherwise show limited activity.
View Article and Find Full Text PDFPhys Chem Chem Phys
January 2025
The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan.
Formic acid (HCOOH) is one of the essential molecules for CO utilization including methanol synthesis and hydrogen carriers. In this study, we have investigated the chemical processes of hydrogen and HCOOH on a dilute-alloy Pd-Cu(111) surface using high-resolution X-ray photoelectron spectroscopy (HR-XPS) and density functional theory (DFT) calculations. The present Pd-Cu(111) surface was prepared at 500 K, and the observed core-level shifts of Pd 3d indicate that Pd atoms were located at the surface and subsurface sites: 335.
View Article and Find Full Text PDFTalanta
December 2024
Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology, Wuhan, 430074, PR China. Electronic address:
Magnesium plays an important role in the hardening mechanism of aluminum alloys, but sensitisation-induced intergranular corrosion cracking limits the widespread use of aluminum alloy in equipment. For on-site quantitative assessment of sensitisation in 5-series aluminum alloys, a laser-induced plasma imaging technique is proposed, which evaluates the degree of aluminum alloy sensitisation by obtaining images of the plasma formed by laser ablation of aluminum alloys, and then classifying and quantifying the images using a residual network. Compared to EMAT, XRD, ECT and LIBS techniques, the sample surface only needs to be polished, does not consume chemical reagents and is not affected by the shape and thickness of the workpiece, which provides higher quantitative accuracy, stability and detection efficiency.
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