Chemistry Test - 14

Cu(II) or the cupric ion is the most important oxidation state of copper. Cu(II) is the oxidation state of copper generally encountered in water. Cupric ions are coordinated with six water molecules in solution; the arrangement of the water molecules is distorted in that there are four molecules bound closely to the copper in a planar array while the other two are more loosely bound in polar position. Addition of ligands such as NH3 to the solution will successively displace only the four planar water molecules. Most cupric compounds and complexes are blue or green in color. They are frequently soluble in water.

Vitamin B - 12 is actually a group of compounds called cobalamins, which contains the metal ion - cobalt.

In this case all three types of ligands L^a, L^b and L^c may be trans, or one type may be trans while the other two are cis. This latter case gives two unique isomers (for a total of three)

With K₄[Fe(CN)₆], Cu²⁺ ions give a reddish brown ppt.

Pt(II) is always square planar and so there are only two isomers the cis-(Cl)₂Pt(NH₃)₂ and trans isomers (Cl)(H₃N)Pt(NH₃)(Cl).

The cis isomer is the famous anticancer drug cis platin

Sodium benzoate has the chemical formula NaC₆H₅CO₂; it is a widely used food preservative.

The given compound is L (-) glyceraldehyde. That's why it has S - configuration.

Diastereomerism occurs when two or more stereoisomers of a compound have different configurations at one or more (but not all) of the equivalent stereocentres and are not mirror images of each other. Thus,