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  • ions
  • Originally, a complex implied a reversible association of molecules , atoms , or ions through such weak chemical bonds . (wikipedia.org)
  • The theory claimed that the reason coordination complexes form is because in solution, ions would be bound via ammonia chains. (wikipedia.org)
  • He claimed that if the ions were to form a chain this would occur outside of the coordination sphere while the ions that bound directly to the metal would do so within the coordination sphere. (wikipedia.org)
  • Metal ions may have more than one coordination number. (thefullwiki.org)
  • These complexes form excellent catalytic reaction by forming stable complex with metal ions and producing the biological activity against antibacterial, antifungal, anticancer and anti-malarial activities. (scribd.com)
  • The Rh-O force constants obtained were correlated with the Rh-O bond lengths, also including previously obtained values for other M(dmso)(6)(3+) complexes with trivalent metal ions. (diva-portal.org)
  • Thus, we describe the coordination of two metal ions to unstructured peptoids incorporating four 8-hydroxyquinoline (HQ) ligands at fixed positions as two (HQ, HQ) metal binding sites, and a mixture of chiral benzyl and alkyl substituents in varied positions along the peptoid backbone. (rsc.org)
  • Interestingly, the binding of Cu 2+ to the (Terpy, HQ) site in one of these peptoids can initiate a conformational change that in turn facilitates the coordination of Zn 2+ (or Co 2+ ) ions to the (HQ, HQ) site, demonstrating a unique example of positive allosteric cooperativity in peptide mimics. (rsc.org)
  • Notably, many metalloproteins found in nature have multiple coordination sites suitable for the binding of at least two different metal ions, each at a distinct site, thus enabling cooperative and challenging catalytic tasks. (rsc.org)
  • 2 The coordination of the metal ions Cu and Zn is especially intriguing because these metals, being the two most abundant trace elements in biological and ecological systems, play central roles in the structure and function of proteins and are both essential components in many enzymes, e.g. the zinc-copper superoxide dismutase. (rsc.org)
  • cobalt complexes
  • This is the case for reactions involving metalloporphyrins as well as vitamin B12 derivatives and similar cobalt complexes for which a wealth of experimental data is available. (pnas.org)
  • constants
  • The results show that the metal ion-oxygen bonding of dimethyl sulfoxide ligands is electrostatically dominated in those complexes and that the stretching force constants provide a useful measure of the relative trans-influence of the opposite ligands in hexa-coordinated Rh(III)-complexes. (diva-portal.org)
  • At 308 K, the second order rate constants (M-1 s-1) are as follows: 17.9 for the reduction of the azidocobalt(III) complex by [Ru(bipy)+, and 1.41 and 2.63 for the [Ru(terpy)(bipy)Cl]+ reduction of the azido- and chlorocobalt(III) complexes, respectively. (scribd.com)
  • crystals
  • In contrast, apolar crystals were grown from complexes containing p -RBA ligands with R = F and CH 3 . (rsc.org)
  • The reaction between TeCl4 and two equivalents of OPPh(3) affords crystals of the coordination complex [TeCl4(OPPh(3))(2)], which has been characterized by X-ray crystallography. (ucl.ac.uk)
  • reactions
  • The world of coordination complexes is currently stimulated by the quest for efficient catalysts for the electrochemical reactions underlying modern energy and environmental challenges. (pnas.org)
  • Type
  • For radiopharmaceutical preparations of complexes of the type 5 a starting from MOT reagents-the reaction conditions would have to be modified. (docme.ru)