Results 11 to 20 of about 25,797 (319)
Palladium-Catalysed Coupling and Acid-Mediated Cyclisation: Synthesis of Fluorenones and Fluorenes
SynOpen, 2018 Palladium-catalysed sequential one-pot synthesis of fluorenones is described. The reaction comprises intermolecular Suzuki coupling and intramolecular acid-mediated cyclisation in a one-pot procedure.
Devarapalli Ravi Kumar +2 more
doaj +2 more sources
9-Chloromethyl-9-[(9H-fluoren-9-yl)methyl]-9H-fluorene [PDF]
Acta Crystallographica Section E Structure Reports Online, 2008 In the title compound, C(28)H(21)Cl, the dihedral angle between the two fluorene ring systems is 71.97 (4)°. There is an intra-molecular C-H⋯Cl hydrogen bond. In the crystal structure, the centroid-to-centroid distance between stacked fluorene ring systems is ca 4.22 Å, which indicates that there are no π-π stacking inter-actions between them.
Shen, Qun +3 more
openaire +3 more sources
Dispiro[fluorene-9,5′-[1,2,3,4]tetrathiane-6′,9′′-fluorene] [PDF]
Acta Crystallographica Section C Crystal Structure Communications, 2001 The tetrathiane ring of the title compound, C26H16S4, has a chair conformation and the molecule has approximate C2 symmetry. Each of the two fluorene ring systems is virtually planar, with the ring planes intersecting at an angle of 67.58 (5) degrees. This novel compound has been formed as a side product from the treatment of 9H-fluorene-9-thione with ...
Linden, Anthony +2 more
openaire +3 more sources
Energy Geoscience, 2023 The influence of origin, depositional environment and thermal maturity of organic matter on the occurrence of aromatic hydrocarbons in source rocks from the central and northwestern Niger Delta was investigated.
Akinsehinwa Akinlua +3 more
doaj +1 more source
Clickable azide-functionalized bromoarylaldehydes – synthesis and photophysical characterization
Beilstein Journal of Organic Chemistry, 2020 Herein, we present a facile synthesis of three azide-functionalized fluorophores and their covalent attachment as triazoles in Huisgen-type cycloadditions with model alkynes.
Dominik Göbel +3 more
doaj +1 more source
ChemistryOpen, 2023 New representatives of 2,4,7‐trisubstituted 9,9‐dialkyl‐9H‐fluorenes were prepared and used for crystallographic investigations as well as initial binding studies towards metal ions and carbohydrates.
Dr. Pierre Seidel +2 more
doaj +1 more source
Organic Materials, 2023 Unsymmetrically disubstituted antiaromatic indenofluorene (IF), in comparison to aromatic pentacene counterpart with unsymmetrical disubstitution, was rare in the literature until our recent report on indeno[1,2-b]fluorene and indeno[2,1-a]fluorene ...
Himanshu Sharma +4 more
doaj +1 more source
Induction of Cytokinin-Independent Tobacco Tissues by Substituted Fluorenes [PDF]
, 1971 Two morphactins and three aminofluorenes initiated the formation of compact tissue nodules in hormone-dependent tobacco callus cultures. These nodules, upon subculture, behaved like partially transformed plant tumors.
Bednar, Thomas W. +1 more
core +3 more sources
Assessment and Characterization of Alkylated PAHs in Selected Sites across Canada
Atmosphere, 2022 Alkylated polycyclic aromatic hydrocarbons (alkyl-PAHs), dibenzothiophenes (DBTs), and unsubstituted polycyclic aromatic hydrocarbons (PAHs) are naturally present in fossil fuels.
Andrzej Wnorowski +5 more
doaj +1 more source
The Role of Torsional Dynamics on Hole and Exciton Stabilization in π‐Stacked Assemblies: Design of Rigid Torsionomers of a Cofacial Bifluorene [PDF]
, 2018 Exciton and charge delocalization across π‐stacked assemblies is of importance in biological systems and functional polymeric materials. To examine the requirements for exciton and hole stabilization, cofacial bifluorene (F2) torsionomers were designed ...
Cai, Jin-Zhe +6 more
core +2 more sources