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Showing 1 to 20 of 160 for “"bidentate"”.
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Trans coordinating bidentate ligands
A number of novel bidentate ligands have been designed, which would, because of steric constraints, coordinate exclusively across the trans positions in a square planar complex. Such complexes could show optical activity centred on the metal if the four ligand groups (A,B,C,IJ in the diagram) were …
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Palladium and platinum complexes of trans-coordinating bidentate phosphine ligands
Two ditertiary phosphine ligands, 1,6.-bis(diphenylphosphino)-hexane, (dPh), and 3,31_bis(diphenylphosphinomethyl)biphenyl, (PP), have been used in the preparation of complexes described in this work. Construction of molecular models proved useful in predicting the likely geometries of the …
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Pleuromutilin and its Application Towards Bidentate Antibiotics: Triazoles, Linker Chemistry, and Serendipitous Discoveries
… pleuromutilins, and two pleuromutilin based bidentate hybrid antibiotics: The pleuromutilin-blasticidins, and the pleuromutilin-azithromycins. Within these new classes, we found highly potent representatives which now serve as lead compounds for future structure activity relationship studies …
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Determining and Exploiting Common Interactions in the Peptidyl Transferase Center for Enhanced Derivative and Bidentate Design
… different species and could be used to inform bidentate design to target two pockets at once. This work serves as a basis for methods to computationally explore drug optimization on ribosome targeting antibiotics to help combat the rapid expansion of AMR.
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Development of O,N-bidentate ruthenium catalysts for isomerization and kinetic studies of ruthenium carbenes for C=C coupling reactions
… This work deals with the development of O,N-bidentate ruthenium homogeneous catalysts for isomerization and kinetic studies of ruthenium cabenes for C=C coupling reactions. Specifically designed ligands are the key in optimizing the efficiency of catalysts. Schiff bases are known to strongly …
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Synthesis and Optical Properties of Four Oligothiophene-Ruthenium Complexes and Synthesis of a Bidentate Ligand for C-F Bond Activation
Photovoltaic cells and fluorescence sensing are two important areas of research in chemistry. The combination of photon-activated electron donors with electron acceptors provides a strong platform for the study of optical devices. A series of four oligothiophene-ruthenium complexes has been …
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An investigation of nickel(II), copper(II) and cobalt(II) complexes employing bidentate ligands derived from 2(β-ketoalkyl) heteroaromatic compounds
Ni(L)₂ complexes, where L equals 2-(trifluoroacetyl heteroaromatic anion were prepared and characterized. 2-(Trifluoroacetyl)picolinato anion (TFAP) gives a Ni(L)₂ complex that appears to be a 5-coordinate square pyramid dimer. The complexes Ni(4MeTFAP)₂ and Ni(5MeTFAP)₂ are square planar complexes …
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Synthesis and hydrogenation of iridium complexes with bidentate and water-soluble phosphine ligands: developing novel water-soluble catalysts for hydrogenation of unsaturates
… found to undergo bridge-splitting reactions with bidentate phosphine ligands to produce coordinatively unsaturated, 16 electron complexes of the form [Ir(COD)(P-P)]Cl (P-P = bidentate phosphine). Two bidentate ligands were examined: 1,2-bis(dimethylphosphino)ethane [DMPE] and …
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Kinetics of the ligand exchange reactions between bidentate ligands and rriethylenetetramine nickelate (II) and synthesis of boron (III) subphthalocyanines with various boron substitutions
<p>Part 1. The kinetics of the ligand exchange reaction between 5-methyl-1,10-phenanthroline and triethylenetetramine nickel (II) were studied spectrophotometrically over the pH range of 5.2 to 8.0 at 25oC. A ternary complex Ni(Trien)(5MP) forms within a few seconds and subsequently reacts with 5MP …
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New luminescent iridium (III) complexes containing NCN cyclometallated ligands: synthesis, photophysical properties and emission tuning
… as biosensors. The vast majority comprise three bidentate ligands, archetypal examples being Ir(ppy)3 and [Ir(ppy)2(bpy)]+ (ppy = 2-phenylpyridine; bpy = 2,2'- bipyridine). The work described here explores the chemistry of iridium(III) complexes that contain a terdentate cyclometallating ligand. …
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Rhodium-katalysierte, asymmetrische Synthese: Ligandendesign und Methodik
… and phosphorous-containing monodentate and bidentate ligands. Application of bidentate ligands such as members of the Taniaphos or the Walphos family furnished the exo-diastereomer predominantly and with up to 82% ee. In contrast, the use of monodentate ligands such as the phosphoramidite …
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Homochiral Crystals for Selective Synthesis
… crystals, and five of them were polymeric. Bidentate sulfide ligands were used to increase the possibility of obtaining a coordination polymer. Five new complexes were prepared and structurally characterized by single crystal X-ray diffraction. Three of the complexes formed coordination …
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Zur Palladium-katalysierten Dimerisierung von Acrylsäuremethylester
… reaction of methyle acrylate by using mono- and bidentate ligands and ionic liquids as solvent. Furthermore a biphasic reaction system is developed and applied to a continuos reactor. The activity of the Palladium catalyst increases with higher basicity of the phosphines. The selectivity …
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Mono- and multinuclear PGM complexes containing thiosemicarbazones synthesis, characterization and antiplasmodial evaluation
… thiosemicarbazone ligands chelate in either a bidentate (N,S) or tridentate (C,N,S) mode.
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The role of outer-sphere residues and substrate-binding at the 3-mercaptopropionic acid dioxygenase (3mdo) active site: a combined spectroscopic and computational investigation
… to Av3MDO. Arguments have been made for both bidentate coordination through the substrate thiolate and carboxylate and monodentate through the thiolate only. Herein, crystallographic, spectroscopic, and computational studies are used to determine the mode of 3MPA coordination to the iron …
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Contributions to the chemistry of higher-coordinate Silicon : synthesis, structure, and stereodynamics of new Silicon(IV) complexes with SiO2N2C, SiO4C, or SiO6 skeletons
… methyl group and two identical bidentate chelate ligands derived from glycine, (S)-alanine, (S)-phenylalanine, (S)-valine, (S)-tert-leucine, or (S)-proline bound to the silicon(IV) coordination center were synthesized and structurally characterized for the first time.The hitherto …
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The synthesis of kinetically stabilised heavy group 13 hydride complexes
… the stereoelectronic character of monoanionic bidentate N,Nʹ-ligands. This Chapter also describes the syntheses of a new super bulky 1,3 bis(2,6 terphenyl)triazene and two C 2,6-terphenyl substituted amidines. Chapter Three introduces the alkali metal chemistry of monoanionic bidentate N,Nʹ …
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An investigation into the alkene hydroformylation reaction using platinum complexes
… as selectivity of platinum complexes containing bidentate ligands in the hydroformylation reaction.
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