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Localized chelated ligands

Thus, at the local level the polychelate effect is close to the chelate one provided the model reaction components are selected correctly. However, in doing so one has to account for the polymeric nature of chelating ligand and the associated contributions to the chelation entropy. In the reaction... [Pg.74]

The reagent iV-pyridyl pyridinium coordinates to Pt(ii) as a 6, iV-chelating ligand to form neutral and cationic complexes (502 and 503, Scheme 66)." NMR studies of the complexes, and IR spectra of the cationic carbonyl-platinum complex (503, L = CO), indicate Pt=C double bond character. The complex with dimethylamino groups at the pyridinium ring can be represented by three stable resonance forms. A, B, and G. Crystal structures of the complexes show localization or delocalization of the 7r-electrons depending on the position of substituents. [Pg.513]

Rg. 7. Frontier rr-orbitals of chelate ligands having an extended rr-electron system in the local Qv symmetry group... [Pg.105]

Dilhiocarbamates and their analogues have 2 potential S-donor atoms joined to a single C atom and their complexes are sometimes called 1,1-dithiolato complexes. If the 2 S atoms are Joined to adjacent C atoms then the equally numerous class of 1,2-dithiolato complexes results. Examples of chelating dithiolenc ligands (drawn for convenience with localized valence bonds and ionic charges) are ... [Pg.674]


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See also in sourсe #XX -- [ Pg.204 ]




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Chelate ligands

Chelated ligand

Ligands chelation

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