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Selected corrected IUPAC name of $K[Co(C{{H}_{3}}N{{H}_{2}})C{{l}_{4}}]$ complex compound.
A. potassium tetrachloridodi(methylamine)cobaltate(III)
B. potassium dichloridodi(methylamine)cobaltate(II)
C. potassium tetrachloridodimethylamine cobalt (II)
D. potassium tetrachloridodimethylamine cobalt (III)

Last updated date: 13th Jun 2024
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Hint: IUPAC gives us some rules for the naming of organic compounds which can also be referred to as nomenclature of organic compounds. IUPAC stands for International Union of Pure and Applied Chemistry.

Complete answer: IUPAC nomenclature gives us information on writing the name of chemical compounds. There are some general rules for it. To write the name of this compound we have to follow some rules.
a. Metal/non-metal present outside the bracket is named first and name remains the same as it is known in periodic table here the compound having potassium so the name is started with potassium.
b. After that give the name to the side chains i.e. 4 chloride groups are there and in this 4 are referred with the term tetra and $C{{l}_{4}}$is referred as tetrachloride.
c. Now it is the term for naming $C{{H}_{3}}N{{H}_{2}}$ which is generally an amine and it is referred as di(methylamine).
d. When any metal or non-metal is present inside the bracket then it is ended with the suffix ate like in the given compound cobalt becomes cobaltate.
e. Last step of equation is to calculate the oxidation state of the atom it can be calculated as:

Hence the name of the compound will be potassium tetrachloridodi(methylamine)cobaltate(III); option A is the correct answer.

Note: The main aim of the nomenclature IUPAC is to create an international standard for designating compounds to promote communication. The purpose of the system is to give a unique and unambiguous name to each structure so that no two structures' names get mixed or they can be identified easily.