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प्रश्न
What are hydrate isomers? Explain with an example.
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उत्तर
The exchange of free solvent molecules such as water, ammonia, alcohol, etc., in the crystal lattice with a ligand in the coordination entity, will give different isomers. These types of isomers are called solvate isomers. If the solvent molecule is water, then these isomers are called hydrate isomers.
For example, the complex with the chemical formula \[\ce{CrCl3.+6H2O}\] has three hydrate isomers as shown below.
| \[\ce{[Cr(H2O)6]Cl3}\] | a violet colour compound and gives three chloride ions in solution |
| \[\ce{[Cr(H2O)5Cl]Cl2.H2O}\] | a pale green colour compound and gives two chloride ions in solution |
| \[\ce{[Cr(H2O)4Cl2]Cl.2H2O}\] | dark green colour compound and gives one chloride ion in solution |
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संबंधित प्रश्न
Answer the following question.
Draw isomers of the following
[Cr(en2)Br2]⊕
Which of the following is NOT an isomer of n-hexane?
Geometrical isomerism is not shown by
Which of the following has an optical isomer?
Which of the following are isostructural pairs?
(A) \[\ce{SO^{2-}4}\] and \[\ce{CrO^{2-}4}\]
(B) SiCl4 and TiCl4
(C) NH3 and \[\ce{NO^-3}\]
(D) BCl3 and BrCl3
Which compound would exhibit optical isomers?
What are structural isomers?
Explain the ionisation isomers.
Match the pairs in column I (pairs of isomers) and column II (types of isomers)
| Column I (Pairs of isomers) |
Column II (Types of isomers) |
| (A) [Cr(H2O)5Cl]Cl2.H2O and [Cr(H2O)4Cl2]Cl.2H2O | (i) Ionization isomers |
| (B) [Co(en)2(NO2)2]+ and [Co(en)2(ONO2)]+ | (ii) Hydrate isomers |
| (C) [Co(NH3)6] [Cr(CN)6] and [Cr(NH3)6] [Co(CN)6] | (iii) Linkage isomers |
| (D) [Pt(NH3)4Cl2] Br2 and [Pt(NH3)4Br2]Cl2 | (iv) Coordination isomers |
Three organic compounds A, B and C are non cyclic functional isomers of carbonyl compounds with molecular formula C4H8O. Isomers A and C give positive Tollen’s test while compound B does not give positive Tollen’s test but gives positive iodoform test. Compounds A and B on reduction with Zn amalgam and conc. HCl give the same product.
- Write the structures of the compounds A, B and C.
- Out of the compounds A, B and C, which one will be the least reactive towards addition of HCN.
