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Question
Write the IUPAC name of the complex [Cr(NH3)4Cl2]+. What type of isomerism does it exhibit?
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Solution
The IUPAC name of the complex [Cr(NH3)4Cl2]+ is Tetraamminedichlorochromium(III) ion.
This complex exhibits geometrical isomerism. [Cr(NH3)4Cl2]+ is a [MA4B2] type of complex, in which the two chloride ligands may be oriented cis and trans to each other.
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(i) \[\ce{[Co(NH3)5 (NO2)]^{2+}}\]
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| Column I (Complex species) | Column II (Isomerism) |
| A. \[\ce{[Co(NH3)4 Cl2]^+}\] | 1. optical |
| B. \[\ce{cis-[Co(en)2 Cl2]^+}\] | 2. ionisation |
| C. \[\ce{[Co(NH3)5 (NO2)]Cl2}\] | 3. coordination |
| D. \[\ce{[Co(NH3)6][Cr(CN)6]}\] | 4. geometrical |
| 5. linkage |
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