Ions Coordination Numbers, Geometries, and Ligands

Complex Ions Coordination Numbers, Geometries, and Ligands 

A complex ion is described by the metal ion and the number and types of ligands attached to it. Its structure has three key characteristics—coordination number, geometry, and number of donor atoms per ligand  

Coordination Numbers and Shapes of Some Complex Ions 

Some Common Ligands in Coordination Compounds Ligand Type Examples 

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Complex Ions Coordination Numbers, Geometries, and Ligands 744 Formulas and Names of Coordination Compounds 745... 

Be familiar with the coordination numbers, geometries, and ligands of complex ions name and write formulas for coordination... 

Be familiar with the coordination numbers, geometries, and ligands of complex ions name and write formulas for coordination compounds describe the types of constitutional and stereoisomerism they exhibit ( 22.2) (SPs 22.2, 22.3) (EPs 22.18-22.39)... 

The first row d8 transition metal ion, nickel(II) provides an excellent system in which to investigate how the nature of the metal ion and its ligands affect coordination number, geometry, and stability. Nickel(II) offers a plethora of stereochemistries with various ligands and, further, complexes of the same chemical constituency can adopt different geometries with a range of stabilities. This behavior of nickel(II) complexes was first noted in 1939 by coordination chemist Lifschitz and his co-workers. Lifschitz reported that several... 

A striking feature of the formulas (4.68a)-(4.68c) is that the coordination number (CN) of ligands bonded to Co is six (CN = 6) in each case. Werner conjectured that such six-fold coordination corresponds to idealized octahedral geometry about the central Co ion, which leads to unique structures for [Co(NH3)6]3+ and [Co(NH3)5C1]2+ but distinct cis and trans isomers for [Co(NH3)4Cl2]+, as observed. X-ray studies subsequently confirmed the accuracy of Werner s brilliant structural inferences. 

Sulfoxides. Table 44 presents some of the reported derivatives of actinyl ions coordinated by sulfoxide and related ligands. These ligands coordinate through the oxide oxygen atom in the equatorial plane of the actinyl ion. Coordination numbers about the metal can range from six to eight, as is typical for actinyl species. One of the most common geometries of complexes is... 

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