Transition Metals and Coordination Chemistry

5 Bonding in Complex Ions The Localized Electron Model 

Walt Disney Concert Hall in Los AngeleSj California. 

I ransition metals have many uses in our society. Iron is used for steel copper JL. for electrical wiring and water pipes titanium for paint silver for photographic paper manganese, chromium, vanadium, and cobalt as additives to steel platinum for industrial and automotive catalysts and so on. 

One indication of the importance of transition metals is the great concern shown by the U.S. government for continuing the supply of these elements. The United States is a net importer of more than 60 strategic and critical minerals, including cobalt, manganese, platinum, palladium, and chromium. All these metals play a vital role in the U.S. economy and defense, but about 90% of the required amounts must be imported (see Table 19.1). 

Some Transition Metals Important to the U.S. Economy and Defense 

In addition to being important in industry, transition metal ions play a vital role in living organisms. For example, complexes of iron provide for the transport and storage of oxygen, molybdenum and iron compounds are catalysts in nitrogen fixation, zinc is found in more than 150 biomolecules in humans, copper and iron play a crucial role in the respiratory cycle, and cobalt is found in essential biomolecules such as vitamin Bi2- 

In this chapter we explore the general properties of transition metals, paying particular attention to the bonding, structure, and properties of the complex ions of these metals. 

The Metallurgy of Iron Production of Steel Heat Treatment of Steel 

The brilliant color of rabies results from trace concentrations of Cr ions. (Chip Chrk/Smithsonian Institution) 

Unless othenwise noted, all art on this page is Cengage Learning 2014. 

---

Quantum Chemistry The Challenge of transition MetaLs and Coordination Chemistry A. Veillard, Ed., D. Reidel, Dordrecht (1986). 

Bauschlicher, C. W. Walch S. P. Langhoff S. R. In Quantum Chemistry the Challenge of Transition Metals and Coordination Chemistry Veil-lard, A., Ed. Reidel Publishing Company Dordrecht Holland, 1986 p 15. 

Veillard, A., ed., Quantum Chemistry The Challenge of Transition Metals and Coordination Chemistry. Reidel Publishing Co., Dordrecht, The Netherlands, 1986. 

E. J. Baerends and A. Rozendaal, in Quantum Chemistry The Challenge of Transition Metals and Coordination Chemistry, A. Veillard, Ed., Reidel, Dordrecht, 1986, pp. 159-177. Analysis of o-Bonding, it-(Back) Bonding and the Synergic Effect in Cr(CO)6. Comparison of Hartree-Fock and Xa Results for Metal-CO Bonding. 

U. Wedig, M. Doig, H. Stoll, and H. Preuss, in The challenge of transition metals and coordination chemistry, edited by A. Veillard (Dordrecht, Reidel, 1986), p. 79-89. 

Veillard A (ed) (1986) Quantum chemistry The challenge of transition metals and coordination chemistry . NATO ASI Series C, vol 176, Reidel, Dordrecht... 

Chapter Tuienty-One Transition Metals and Coordination Chemistry... 

---