Statement TypeDirection (Q. No. 25) This section is based on Statement...
[Ni(dmg)2] : bis (dimethylglyoximato) nickel (II)
View all questions of this test
Statement TypeDirection (Q. No. 25) This section is based on Statement...
Explanation:
IUPAC names of coordination compounds are given according to the rules set by International Union of Pure and Applied Chemistry (IUPAC).
Statement I:
The given complex is [(NH3)5CrOHCr(NH3)5]Cl5.
- It contains two chromium ions, one is in +3 oxidation state and other is in +1 oxidation state.
- The complex has three different ligands, NH3, OH- and Cl-.
- According to the IUPAC nomenclature, the ligands should be listed alphabetically according to their name.
- The complete name of the complex consists of three parts, which are as follows:
1. Name of the cation: Pentammine chromium (III) ion, [Cr(NH3)5]3+
2. Name of the anion: Chromium (III) hydroxo pentammine chromium (III) ion, [Cr(OH)(NH3)5Cr(NH3)5]3+
3. Name of the counter ion: Chloride ion, Cl-
Hence, the IUPAC name of the complex is pentammine chromium (III) hydroxo pentammine chromium (III) chloride.
Statement II:
The given complex is [Ni(dmg)2].
- It contains one nickel ion in +3 oxidation state.
- The ligand used in this complex is dimethylglyoxime (dmg).
- According to the IUPAC nomenclature, the ligands should be listed alphabetically according to their name.
- The complete name of the complex consists of two parts, which are as follows:
1. Name of the cation: Bis(dimethylglyoximato) nickel (III) ion, [Ni(dmg)2]3+
2. There is no counter ion in this complex.
Hence, the IUPAC name of the complex is bis(dimethylglyoximato) nickel (III).
Conclusion:
Both Statement I and Statement II are correct but Statement II is not the correct explanation of Statement I. Statement I and Statement II are independent statements and are related to different complexes. Therefore, the correct answer is option (C).