Which of the following statements is not correct as per the nomenclatu...
Explanation:
The correct answer is option C - The name of the anionic part should be written first.
Explanation:
The nomenclature of coordination compounds follows certain rules and conventions. Let's discuss each statement and understand why option C is incorrect.
a) The name of neutral ligands is written as such except a few like aqua for water:
In coordination compounds, ligands are classified into two categories - neutral ligands and anionic ligands. Neutral ligands are named as they are, without any changes. For example, H2O is named as water, NH3 is named as ammonia, CO is named as carbonyl, etc. However, there are a few exceptions to this rule. For example, H2O is named as aqua when it is a ligand in a coordination compound. So, statement A is correct.
b) The oxidation state of a metal in the coordination sphere should be written in roman numerals:
The oxidation state of the metal ion in a coordination compound is indicated by a Roman numeral in parentheses after the name of the metal. This is necessary because the same metal can exhibit different oxidation states in different coordination compounds. For example, Fe(II) represents iron in the +2 oxidation state, while Fe(III) represents iron in the +3 oxidation state. So, statement B is correct.
c) The name of the anionic part should be written first:
According to the rules of nomenclature, the name of the cationic part should be written first followed by the name of the anionic part. This is because the cationic part is usually a metal or a positive ion, while the anionic part is usually a ligand or a negative ion. For example, in the coordination compound [Co(NH3)6]Cl3, the cationic part is [Co(NH3)6] (hexaamminecobalt) and the anionic part is Cl3 (trichloride). So, statement C is incorrect.
d) The name of the cationic part should be written first:
As mentioned in the explanation for statement C, the name of the cationic part should be written first in the nomenclature of coordination compounds. So, statement D is correct.
Conclusion:
Based on the above explanation, the correct answer is option C - The name of the anionic part should be written first.
Which of the following statements is not correct as per the nomenclatu...
The correct answer is option C
In the given options, option c and d are contradictory to each other but while writing the coordination compounds also the positive ion is written on left side that is first then the negative ion is written so during nomenclature start from left that is first positive ion is written that is the cationic part first. H2O is a neutral ligand written as aqua in nomenclature of complexes and option b is a rule .So answer is option c