Results 61 to 70 of about 158,943 (323)
Accounts of Chemical Research, 2016 Chiral phosphoric acids have become powerful catalysts for the stereocontrolled synthesis of a diverse array of organic compounds. Since the initial report, the development of phosphoric acids as catalysts has been rapid, demonstrating the tremendous ...
Jolene P. Reid, L. Simón, J. Goodman
semanticscholar +1 more source
The first total synthesis of (+)-mucosin
, 2012 The first total synthesis of (+)-mucosin has been completed allowing assignment of the absolute stereochemistry of the natural product. A zirconium induced co-cyclisation was utilised to install the correct stereochemistry of the four contiguous ...
Henderson, Alan R. +3 more
core +1 more source
Chiroptical studies on brevianamide B : vibrational and electronic circular dichroism confronted [PDF]
, 2015 Chiroptical spectroscopy, such as electronic circular dichroism (ECD) and vibrational circular dichroism (VCD) are highly sensitive techniques to probe molecular conformation, configuration, solvation and aggregation.
Bultinck, Patrick +7 more
core +2 more sources
Core packing of well-defined x-ray and NMR structures is the same [PDF]
Protein Science 31 (2022) e4373, 2022 Numerous studies have investigated the differences and similarities between protein structures determined by solution NMR spectroscopy and those determined by x-ray crystallography. A fundamental question is whether any observed differences are due to differing methodologies, or to differences in the behavior of proteins in solution versus in the ...
arxiv
Anharmonicity-driven Rashba co-helical excitons break quantum efficiency limitation [PDF]
Adv. Mater. (2020), 2005400, 2020 Closed-shell light-emitting diodes (LEDs) suffer from the internal quantum efficiency (IQE) limitation imposed by optically inactive triplet excitons. Here we show an undiscovered emission mechanism of lead-halide-perovskites (LHPs) APbX$_3$ (A=Cs/CN$_2$H$_5$; X=Cl/Br/I) that circumvents the efficiency limit of closed-shell LEDs.
arxiv +1 more source
Center for Educational Policy Studies JournalThis paper presents an analysis of the use of multimedia and hands-on models on university students’ understanding of stereochemistry. The relationship between students’ scientific reasoning skills and their understanding of stereochemistry was also ...
Rooserina Kusumaningdyah +5 more
doaj +1 more source
Marine Drugs, 2020 The harpacticoid copepod Tigriopus californicus has been recognized as a model organism for the study of marine pollutants. Furthermore, the nutritional profile of this copepod is of interest to the aquafeed industry.
Alfonso Prado-Cabrero +2 more
doaj +1 more source
Learning 3D Representations of Molecular Chirality with Invariance to Bond Rotations [PDF]
arXiv, 2021 Molecular chirality, a form of stereochemistry most often describing relative spatial arrangements of bonded neighbors around tetrahedral carbon centers, influences the set of 3D conformers accessible to the molecule without changing its 2D graph connectivity.
arxiv
Bottom-Up Elucidation of Glycosidic Bond Stereochemistry.
Analytical Chemistry, 2017 The lack of robust, high-throughput, and sensitive analytical strategies that can conclusively map the structure of glycans has significantly hampered progress in fundamental and applied aspects of glycoscience.
C. Gray +15 more
semanticscholar +1 more source
The Metallacyclopentane-Olefin Interchange Reaction [PDF]
, 1977 Tris(triphenylphosphine)tetramethylenenickel(II) and biscyclopentadienyltetramethylenetitanium, prepared from the reaction of a 1,4-dilithiobutane and the transition metal dihalides react with olefins to produce substituted metallacyclopentanes; the ...
Grubbs, Robert H., Miyashita, Akira
core +1 more source