Question:
Write IUPAC names of the following coordination compounds:
(i) [PtCl2(en)2](NO3)2
(ii) [Cr(NH3)6][Co(CN)6]
Write IUPAC names of the following coordination compounds:
(i) [PtCl2(en)2](NO3)2
(ii) [Cr(NH3)6][Co(CN)6]
(i) [PtCl2(en)2](NO3)2
(ii) [Cr(NH3)6][Co(CN)6]
Show Hint
Balance charges from the counter ions to get the metal oxidation number, use bis(ethane-1,2-diamine) for en, and end the anionic metal in -ate.
Updated On: Jul 10, 2026
Show Solution
Verified By Collegedunia
Solution and Explanation
Rules used: Ligands are named alphabetically before the metal, anionic ligands take the ending -o (chlorido), the neutral ligand ethane-1,2-diamine (en) is a bis- type so multiplying prefixes bis/tris are used with brackets, and the oxidation state of the metal is written in Roman numerals. In an anionic complex the metal ends in -ate.
Part (i): [PtCl2(en)2](NO3)2
Step 1: The two nitrate ions outside carry -2 total charge, so the complex cation is +2.
Step 2: Let the oxidation state of Pt be x. Then x + 2(-1 from Cl) + 2(0 from en) = +2, giving x = +4.
Step 3: Naming alphabetically (chlorido before ethanediamine): dichloridobis(ethane-1,2-diamine)platinum(IV) nitrate.
Part (ii): [Cr(NH3)6][Co(CN)6]
Step 1: The cation is [Cr(NH3)6]3+ with Cr = +3 (six neutral NH3). The anion is [Co(CN)6]3- with Co = +3 (six CN-: x - 6 = -3).
Step 2: Cation named first, then anion with -ate ending on cobalt: hexaamminechromium(III) hexacyanidocobaltate(III).
Part (i): [PtCl2(en)2](NO3)2
Step 1: The two nitrate ions outside carry -2 total charge, so the complex cation is +2.
Step 2: Let the oxidation state of Pt be x. Then x + 2(-1 from Cl) + 2(0 from en) = +2, giving x = +4.
Step 3: Naming alphabetically (chlorido before ethanediamine): dichloridobis(ethane-1,2-diamine)platinum(IV) nitrate.
Part (ii): [Cr(NH3)6][Co(CN)6]
Step 1: The cation is [Cr(NH3)6]3+ with Cr = +3 (six neutral NH3). The anion is [Co(CN)6]3- with Co = +3 (six CN-: x - 6 = -3).
Step 2: Cation named first, then anion with -ate ending on cobalt: hexaamminechromium(III) hexacyanidocobaltate(III).
Was this answer helpful?
0
0
Top UP Board XII Chemistry Questions
- Four alternatives are given in each part of this question. Write the correct alternative in your answer-book. Fe is:
- The configuration showing maximum oxidation state is:
- After eliminating salt bridge of any Galvanic cell, voltage of the cell:
- Electrode potential of standard hydrogen electrode is:
- The true statement for the formula \( K = Ae^{-E_a / RT} \) is:
View More Questions
Top UP Board XII Coordination Compounds Questions
- Write Valence Bond Theory (VBT) of coordination compounds. Also state the demerits of this theory.
Explain the importance of coordination compounds.
- Write a short note on RNA.
- Explain the mechanism of electrophilic substitution in haloarenes with the help of an example.
- The coordination number of Cu in \([Cu(CN)_4]^{3-}\) ion is:
View More Questions
Top UP Board XII Questions
- In which one of the following States of India is the density of population the highest?
- Which one of the following States of India has the largest urban population?
- Which one of the following States is not related to the production of mineral oil?
- Which one of the following sea ports is located on the eastern coast of India?
- What is meant by ‘Humanisation of Nature’?
View More Questions