Labile chloride ligands

By taking advantage of the labile chloride ligands of the central ( inner ) metal, the above-described trinuclear dendrons allowed to obtain higher nuclearity systems, such as the prototype decanuclear [Ru (2,3-dpp)Ru[(2,3-dpp)Ru(bpy)2]2 3]20 +... 

The five coordinate Beat complex (4) has both a vacant coordination site and a labile chloride ligand. As shown in Scheme 3 addition of a simple Lewis acid ligand affords the saturated complexes (8) or (9) where the introduced ligand is tram to Beat.4 Halide removal from (4) with AgSbFJMeCN gives the cation (10) in which the two acetonitrile ligands can be easily... 

The Fe + complex of the tetradentate NaO-donor tripodal ligand (168) provides a model for mononuclear nonheme bioactive sites. [Fe (168)Cl2], whose chloride ligands are substitution-labile, reacts with 2 in DMSO solution to give an Fe .02 species that may well be identical with the stable Fe 02 species obtained from the reaction of the iron(II) complex of (168) with 02. ... 

The complex PtCl2 is an extremely useful precursor in platinum chemistry.10b The labile benzonitrile ligands can be easily and quantatively replaced by neutral ligands (e.g., amines, phosphines, etc.). On the other hand, the chloride ligands can be substituted by nucleophiles of which an example is given below. 

Stabilization Mechanism. Zinc and cadmium salts react with defect sites on PVC to displace the labile chloride atoms (32). This reaction ultimately leads to the formation of the respective chloride salts which can be very damaging to the polymer. The role of the calcium and/or barium carboxylate is to react with the newly formed zinc—chlorine or cadmium—chlorine bonds by exchanging ligands (33). In effect, this regenerates the active zinc or cadmium stabilizer and delays the formation of significant concentrations of strong Lewis acids. 

The coordination chemistry of sea water represents a new and useful approach to understanding the chemical properties of sea water. The coordination chemistry of sea water differs from contemporary coordination chemistry in the following respects most complexes involve pretransition metals, most complexes are labile, the ligands are simpler (water, hydroxide, chloride, carbonate, sulfate), and time and space are important parameters. Principles of coordination chemistry are applied to contemporary research in marine science in four areas analysis of constituents of natural waters, the nature of metallic species in the oceans, the Red Tide problem, and carbonate geochemistry. 

In the case of inert cobalt(m) complexes it is possible to isolate the chelated products of the reaction. Let us return to the hydrolysis of the complex cations [Co(en)2(H2NCH2C02R)Cl]2+ (3.1), which contain a monodentate iV-bonded amino acid ester, that we encountered in Fig. 3-8. The chelate effect would be expected to favour the conversion of this to the chelated didentate AO-bonded ligand. However, the cobalt(iu) centre is kinetically inert and the chloride ligand is non-labile. When silver(i)... 

---