Applications of Coordination Chemistry

As a result of the systematic application of coordination-chemistry principles, dozens of previously unsuspected stnicture types have been synthesized in which polyhedral boranes or their anions can be considered to act as ligands which donate electron density to metal centres, thereby forming novel metallaboranc elusters, ". Some 40 metals have been found to act as acceptors in this way (see also p. 178). The ideas have been particularly helpful m emphasizing the close interconnection between several previously separated branches of chemistry, notably boron hydride clu.ster chemistry, metallaboranc and metallacarbaborane chemistry (pp. 189-95). organometallic chemistry and metal-metal cluster chemistry. All are now seen to be parts of a coherent whole. 

Thirdly, some obvious applications of coordination chemistry are omitted from this volume if they are better treated elsewhere. This is the case when a specific application is heavily associated with one particular element or group of elements, to the extent that the application is more appropriately discussed in the section on that element. Essentially all of the coordination chemistry of technetium, for example, relates to its use in radioimmunoimaging inclusion of this in Chapter 20 of this volume would have left the chapter on technetium in Volume 5 almost empty. For the same reason, the applications of actinide coordination complexes to purification, recovery,... 

Despite the continuing development and refinement of instrumental techniques for the analysis of total iron the estimation of iron(II) in geological and environmental samples still appears to be best carried out by redox titration methods, " which are of course dependent for their success on the proper application of coordination chemistry. 

Faulkner S, Matthews JL (2003) In Ward MD (ed) Applications of coordination chemistry. Comprehensive coordination chemistry II, vol 9, 2nd edn. Elsevier, Amsterdam, p 913... 

C.L. Hill, in Applications of Coordination Chemistry, Ed. M. Ward, Comprehensive Coordination Chemistry-II From Biology to Nanotechnology, Elsevier Oxford 2003. Vol. 

Jones, C.J. and Thornback, J.R. (2007) Medicinal Applications of Coordination Chemistry, RSC Publishing, London. A recent, readable account of the state of use of coordination compounds for pharmaceutical and medical use. 

A deactivating agent for copper-activated sphalerite is any species that has sufficient affinity for copper(I) or (II) to compete for it with sulfide ions in the surface lattice of the mineral, thus removing it from the surface. Ligands such as cyanide or ethylenediamine, which coordinate strongly to copper, have therefore been found to be the most effective. A knowledge of the stability of the species present in a system composed of H+, Zn +, Cu +, and CN ions has enabled the extent of deactivation Ijy cyanide ion to be predicted the results of these predictions are compared with experimental observations in Figure 2. This approach has been successfully extended to the effects of pH and the presence of other ions such as carbonate on the activation and deactivation processes, and is a pertinent example of the quantitative application of coordination chemistry to complex systems. 

The above brief survey implies that uses of electrochemistry are extremely broad ranging. Given that the application of coordination chemistry also is extremely diverse, it therefore logically follows that electrochemistry and coordination chemistry overlap in many areas of applied science. For example, a detailed understanding of the photoredox chemistry of... 

Extractive separation of metals is usually based on complex formation with inorganic and organic ligands. Therefore the use of the ideas, approaches, and methods of coordination chemistry has always been a most fruitful approach to the extraction of the elements. History shows that many problems of selectivity of separation or enhanced isolation have been successively solved by the rational application of coordination chemistry, e.g., the concept of hard and soft acids and bases. The efficiency of extraction depends on, inter alia, the ratio of charge and coordination number of metal ion. Study of this effect permitted the development of ways to improve separation due to changes in hydration of the species to be extracted. 

Color and the Colors of Complexes 24-8 Aspects of Complex-Ion Equilibria 24-9 Acid-Base Reactions of Complex Ions 24-10 Some Kinetic Considerations 24-11 Applications of Coordination Chemistry... 

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