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  • reactivity
  • Binding of the metal with the ligands results in a set of molecular orbitals, where the metal can be identified with a new HOMO and LUMO (the orbitals defining the properties and reactivity of the resulting complex) and a certain ordering of the 5 d-orbitals (which may be filled, or partially filled with electrons). (wikipedia.org)
  • cobalt
  • Cooperativity between cobalt and non-innocent ligands in electron transfer processes has been utilized for (electro)catalytic C-C bond formation reactions. (rsc.org)
  • He showed, among other things, that the formulas of many cobalt(III) and chromium(III) compounds can be understood if the metal has six ligands in an octahedral geometry. (wikipedia.org)
  • synthesis
  • The ligand was successfully applied to the synthesis of the herbicide (S)-metolachlor, the active ingredient in the most common herbicide in the United States. (wikipedia.org)
  • Figure 4: Scheme for general synthesis of the Josiphos ligands An important improvement since the first intent, and already pointed out in figure 4, has been using the N(CH3)2 group as the leaving group and not acetate. (wikipedia.org)
  • reaction
  • They have been good ligands in Pd-catalyzed reaction of aryl chlorides and aryl vinyl tosylates with TON of 20,000 or higher. (wikipedia.org)
  • It is easily prepared by the reaction of molten methimazole (1-methylimidazole-2-thione) with sodium borohydride, giving the sodium salt of the ligand. (wikipedia.org)
  • The reaction of a copper complex bearing iminosemiquinone ligands with a CF 3 + source provides an unprecedented Cu II -CF 3 complex through ligand-based oxidation. (rsc.org)
  • Using 6 mol% of ligand and 1.5 mol% of Pd 2 (dba) 3 , the reaction produced the desired biaryls with good to excellent yields ( Table 1 ). (sigmaaldrich.com)
  • bound
  • Myoglobin (blue) with its ligand heme (orange) bound. (wikipedia.org)
  • Metals and metalloids are bound to ligands in virtually all circumstances, although gaseous "naked" metal ions can be generated in a high vacuum. (wikipedia.org)
  • atom
  • Ligands are classified in many ways, including: charge, size (bulk), the identity of the coordinating atom(s), and the number of electrons donated to the metal ( denticity or hapticity ). (wikipedia.org)
  • metal
  • Two of the essential components for highly active and selective catalysts are the ligand and the metal. (sigmaaldrich.com)
  • However, there are also organic species that can chelate a metal, providing some of its ligands. (everything2.com)
  • Furthermore, the metal-ligand bond order can range from one to three. (wikipedia.org)
  • The HOMO (Highest Occupied Molecular Orbital) can be mainly of ligands or metal character. (wikipedia.org)
  • Metal ions preferentially bind certain ligands. (wikipedia.org)
  • In general, 'hard' metal ions prefer weak field ligands, whereas 'soft' metal ions prefer strong field ligands. (wikipedia.org)
  • According to the molecular orbital theory, the HOMO of the ligand should have an energy that overlaps with the LUMO (Lowest Unoccupied Molecular Orbital) of the metal preferential. (wikipedia.org)
  • This ordering of ligands is almost invariable for all metal ions and is called spectrochemical series . (wikipedia.org)
  • family
  • Diphosphine ligands were prepared with secondary phosphines, they are today known as Josiphos ligands family, which gets the name after Josi Puleo, the technician who prepared the first one. (wikipedia.org)
  • Various ligands in this family are known, differing in what substituents are on the imidazoles. (wikipedia.org)
  • Professor Landis and coworkers developed a new family of ligands based on 2,5‑disubstituted phospholane addressing these issues. (sigmaaldrich.com)
  • field
  • Twenty years ago Tanabe and Sugano published the first ligand field energy diagrarns which are applicable to dN electronic configurations. (springer.com)
  • The present volume is an attempt to fill the gap by providing a reasonable nurober of complete and accurate ligand field energy diagrarns for dN configurations in the most commonly encountered symmetries. (springer.com)
  • Guest editors Louise Berben, Bas de Bruin and Alan Heyduk introduce this web collection focusing on recent achievements within the field of non-innocent ligands. (rsc.org)
  • An important aspect of simple Crystal Field Theory is the orientation of the d-orbital lobes with respect to the position of the surrounding ligands. (merlot.org)
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  • partner
  • The relationship between ligand and binding partner is a function of charge, hydrophobicity, and molecular structure. (wikipedia.org)
  • variety
  • Coupling with Grignards and Negishi coupling reactions A variety of Josiphos ligands are commercially available, under licence from Solvias. (wikipedia.org)
  • The versatility of these ligands was demonstrated with the coupling of a variety of pyridines and pentadienes. (sigmaaldrich.com)
  • target
  • For sparteine, these were then recombined to generate the complexity required in the target ligand. (york.ac.uk)
  • specific
  • Pioglitazone, a specific ligand of the peroxisome proliferator-activated receptor gamma reduces gastric mucosal injury induced by ischaemia/reperfusion in rat," Scandinavian Journal of Gastroenterology , vol. 38, no. 5, pp. 468-476, 2003. (hindawi.com)
  • charge
  • The TmR anion simulates the environment provided by three facial thiolate ligands but without the 3- charge of a facial trithiolate. (wikipedia.org)