Results 91 to 100 of about 74,577 (229)
Iron Catalyzed Aryl–Aryl Kumada Cross‐Coupling: A Mechanistic and Computational Investigation
Angewandte Chemie, EarlyView.Despite intense interest, the mechanism of iron‐catalyzed aryl–aryl cross‐coupling remains poorly understood. Combining Mössbauer spectroscopy, kinetics analysis, and DFT computations these studies reveal a novel Fe(I)/Fe(II)/Fe(III) catalytic for aryl–aryl cross‐coupling mediated by an Fe(II) PCNHCP Pincer complex. These findings close a key knowledge
Jatin Panda +11 more
wiley +2 more sources
Phylogenetic systematics of Juncaceae
American Journal of Botany, EarlyView.Abstract Premise Juncaceae has needed taxonomic revision for some time. Specifically, the genus Juncus s.l. is known to be paraphyletic because five small southern‐hemisphere genera have been shown repeatedly to be nested within it. In 2022, a new classification was proposed, based on phylogenies built from one nuclear and three plastid regions ...
Reed J. Kenny +2 more
wiley +1 more source
Soil, competition, and niche shifts shape the floral mosaic of an annual plant diversity hotspot
American Journal of Botany, EarlyView.Abstract Premise Plant species with affinity for harsh substrates often have well‐defined edaphic (soil) niches and are ideal for exploring questions of community assembly. Vertic clay soils are chemically and physically challenging to plant establishment and productivity, and annual plant communities associated with these soils of the San Joaquin ...
Emma R. Fryer +5 more
wiley +1 more source
Arylhydrazines: Convenient Homogeneous Reductants for Scalable Cross‐Coupling
Angewandte Chemie, EarlyView.Reductive cross‐couplings enable efficient C–C bond formation but are limited by the heterogeneity of Zn or costly reagents like TDAE. We report arylhydrazines as inexpensive, convenient reductants for Ni‐catalyzed sp2–sp3 coupling of aryl halides and secondary alkyl iodides. Mechanistic studies support hydrazine‐mediated NiII reduction for a NiI/NiIII
Nils Kurig +5 more
wiley +2 more sources
He huaxue yu fangshe huaxueDuring the in-situ leaching process of uranium, both the chemical composition of the leaching solution and the in-situ hydrogeochemical conditions can affect the chemical speciation of uranium. The chemical speciation of uranium significantly impacts its
Ya-wen CHEN +7 more
doaj +1 more source
Angewandte Chemie, EarlyView.Tris(hydroxymethyl)aminomethan – schematisch als Oktopus dargestellt – wirkt gleichzeitig als Alkoxy‐Ligand, Chelator und strukturleitender Puffer und programmiert in Wasser die Speziation, die Nukleation und die Heterometall‐Insertion von Polyoxometallaten. ZUSAMMENFASSUNG Polyoxometallate (POMs; molekulare Metall–Oxo‐Cluster) werden typischerweise in
Nadiia I. Gumerova, Annette Rompel
wiley +1 more source
Genomic epidemiology of Histoplasma in Africa
mBioHistoplasmosis, the disease caused by thermally dimorphic fungi in the genus Histoplasma, is usually associated with pulmonary involvement in healthy individuals and a disseminated syndrome in immunocompromised patients.
Rutendo E. Mapengo +15 more
doaj +1 more source
Experimental evolution of hybrid populations to identify Dobzhansky–Muller incompatibility loci
Ecology and EvolutionEpistatic interactions between loci that reduce fitness in interspecies hybrids, Dobzhansky–Muller incompatibilities (DMIs), contribute genetically to the inviability and infertility within hybrid populations. It remains a challenge, however, to identify
Nicole Szabo, Asher D. Cutter
doaj +1 more source