Problem 21
What is a coordination number? What structures are generally observed for complexes in which the central metal ion has a coordination number of \(4 ?\) What is the most common structure observed for coordination number 6 ?
Problem 22
Sketch the structure of an octahedral complex that contains only identical monodentate ligands. Use \(M\) for the metal and \(L\) for the ligand.
Problem 23
Sketch the structure of the octahedral [Co(EDTA)] ^{-} ion. Remember that adjacent donor atoms in a polydentate ligand span adjacent positions in the octahedron.
Problem 24
Give the geometry or geometries for coordination number (a) \(2,\) (b) 4 , and (c) 6 .
Problem 25
Draw (a) a tetrahedral structure, (b) a square planar structure, (c) a tetrahedral structure, and (d) an octahedral structure.
Problem 27
Define stereoisomerism, geometric isomerism, chiral isomers, and enantiomers.
Problem 29
What condition must be fulfilled in order for a molecule or ion to be chiral?
Problem 31
What are the differences between optical and geometric isomers?
Problem 33
Which \(d\) orbitals point between the \(x, y,\) and \(z\) axes? Which point along the coordinate axes?
Problem 34
Explain why an electron in a \(d_{z^{2}}\) or \(d_{x^{2}-y^{2}}\) orbital in an octahedral complex will experience greater repulsions because of the presence of the ligands than an electron in a \(d_{x y}, d_{x z}\), or \(d_{y z}\) orbital.
