The modern theory of coordination chemistry is based largely on the work of alfred werner 18661919. Molecular orbital theory coordination compounds pdf. What links here related changes upload file special pages permanent link page. According to the molecular orbital theory, the homo of the ligand should have an. The important postulates of werners theory are as follows. In coordination compounds, the central metal or metal.
The power behind any theory is how well it explains properties. In a series of careful experiments carried out in the late 1880s and early 1890s, he examined the properties of several series of metal halide complexes with ammonia. The central metal and the ligands directly bonded to it make up the coordination sphere of the complex. Alfred werner, first of all gave the theory for complex compounds which is known as werner s coordination theory. A coordination complex consists of a central atom or ion, which is usually metallic and is called. The theory claimed that the reason coordination complexes form is because in. Due to this theory he is awarded by nobel prize and he is also called the father of coordination chemistry. By this the ions of that metal combine strongly with the negative ion or neutral molecules in first attraction. Chemistry notes for class 12 chapter 9 coordination compounds coordination compounds are those addition molecular compounds which retain their identity in solid state as well as in dissolved state. His accomplishments included the development of the theory of coordination compounds. Chapter 24 chemistry of coordination compounds msu chemistry. A very famous scientist werners in the year 1823 put forward his theory of coordination compounds which describes the formation and structure of complex compounds which is later termed as werner s theory of coordinate compounds. Werners theory of coordination compounds chemistry.
After studying this unit, you will be compounds able to appreciate the postulates of werner s theory of coordination compounds. Some metals have the secondary valency in addition to their primary valence. What links here related changes upload file special pages permanent. There are 3 ways of looking at bonding in coordination compounds. Werners coordination theory is one of the great landmarks of chemistry and. In coordination chemistry, a ligand is an ion or molecule functional group that binds to a. The central metal or the metal atoms in coordination compounds show two types of valency. Chemistry notes for class 12 chapter 9 coordination compounds. Bonding in coordination compounds valence bond theory.
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