Question

Give the systematic names of these compounds. Spelling counts!

(a) CuI(s)

(b) Fe2O3(s)

(c) CoF2(s)

(d) FeO(s)

Answer 1

Concepts and reason

Different compounds of transition metals are given and the systematic names need to be answer. The systematic names follow specific set of rules to name a compound giving its detailed description including the oxidation states.

Fundamentals

The rules for systematic names of transition metals are as follows:

• Separate the cationic and anionic part.

• Write the name of the cation as mentioned in the periodic table.

• Next, write the oxidation state of the metal ion in parenthesis in roman numerals.

• Finally, write the monoatomic anions such as halogens, oxygen, nitrogen by putting a suffix ‘ide’ to the name of root of the parent element.

Part a

The systematic name of CuI is copper (I) iodide. Here, the cation is Copper (Cu) and the anion is Iodine (I).

Part b

The systematic name of ${\rm{F}}{{\rm{e}}_2}{{\rm{O}}_3}$ is Iron (III) oxide. Here, the cation is Iron (Fe) and the anion is oxide (O).

Part c

The systematic name of ${\rm{Co}}{{\rm{F}}_2}$ is cobalt (II) fluoride. Here, the cation is cobalt (Co) and the anion is fluoride (F).

Part d

The systematic name of FeO is Iron (II) oxide. Here, the cation is Iron (Fe) and the anion is oxide (O).

Ans: Part a

The systematic name is copper (I) iodide.

Part b

The systematic name of ${\rm{F}}{{\rm{e}}_2}{{\rm{O}}_3}$ is Iron (III) oxide.

Part c

The systematic name of ${\rm{Co}}{{\rm{F}}_2}$ is cobalt (II) fluoride.

Part d

The systematic name of FeO is Iron (II) oxide.