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प्रश्न
Explain cationic complexes and anionic complexes of co-ordination compounds.
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उत्तर
1. Cationic complexes: A complex in which the complex ion carries a net positive charge is called a cationic complex.
Example: [Fe(H2O)6]Cl3, [Co(NH3)6]Cl3, [Ni(NH3)6]Cl2 are cationic complexes. This can be seen from the following reactions:
\[\ce{[Co(NH3)6]Cl3 <=> [Co(NH3)6]^{3+} + 3Cl-}\]
\[\ce{[Fe(H2O)6]Cl3 <=> [Fe(H2O)6]^{3+} + 3Cl-}\]
\[\ce{[Ni(NH3)6]Cl2 <=> [Ni(NH3)6]^{2+} + 2Cl-}\]
2. Anionic complexes: The complexes in which the complex ion carries a net negative charge are called anionic complexes.
Example: K4[Fe(CN)6], K[Ag(CN)2], K2[HgI4] are anionic complex ions as indicated in the following reactions:
\[\ce{K4[Fe(CN)6] <=> 4K+ + [Fe(CN)6]^{4-}}\]
\[\ce{K[Ag(CN)2] <=> K+ + [Ag(CN)2]^{1-}}\]
\[\ce{K2[HgI4] <=> 2K+ + [HgI4]^{2-}}\]
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संबंधित प्रश्न
When a coordination compound CoCl3.6NH3 is mixed with AgNO3, 3 moles of AgCl are precipitated per mole of the compound. Write the structural formula of the coordination compound.
Draw one of the geometrical isomers of the complex [Pt(en)2Cl2]2+ which is optically active.
What type of isomerism is exhibited by the complex [Co(en)3]3+?
(en = ethane-1,2-diamine)
Define the following term:
Anomers
Indicate the type of isomerism exhibited by the following complex and draw the structure for the isomer:
[Co(NH3)5(NO2)](NO3)2
How many geometrical isomers are possible in the following coordination entity?
[Cr(C2O4)3]3−
How many geometrical isomers are possible in the following coordination entity?
[Co(NH3)3Cl3]
Draw the structure of optical isomers of [Cr(C2O4)3]3−.
Draw the structure of optical isomers of [PtCl2(en)2]2+.
Draw all the isomers (geometrical and optical) of [Co(NH3)2Cl2(en)]+.
Write the structures of optical isomers of the complex ion [Co(en)2Cl2]+.
Draw the geometrical isomers of complex [Pt(en)2Cl2]2+.
Name the type of isomerism exhibited by the following pairs of compound:
(1) (C2H5)2NH and CH3-NH-C3H7
(2) 1 – butanol and 2 methyl-1 -propanol.
Name the type of isomerism that the compound with molecular formula C3H6O2 exhibits. Represent the isomers.
Name the type of isomerism shown by the following pair of compounds:
[CoCl(H2O)(NH3)4]Cl2 and [CoCl2(NH3)4]Cl.H2O
Answer the following question.
Write IUPAC name of the complex [Pt(en)2CI2]. Draw structures of geometrical isomers for this complex.
Identify the optically active compounds from the following:
(i) \[\ce{[Co(en)3]^{3+}}\]
(ii) \[\ce{[trans - [Co(en)2Cl2]^+}\]
(iii) \[\ce{cis - [Co(en)2Cl2]^+}\]
(iv) \[\ce{[Cr(NH3)5Cl]}\]
Name the type of isomerism shown by the following pair of compounds:
[Cr(NH3)5Br]SO4 and [Cr(NH3)5SO4]Br
Which one of the following complexes shows optical isomerism? (en = ethylenediamine)
Draw the geometrical isomers of [Co(en)2Cl2]2+. Which geometrical isomer of [Co(en)2Cl2]2+ is not optically active and why?
Which of the following molecules has a chiral centre correctly labelled with an asterisk (*)?
Assertion (A): Trans [CrCl2(ox)2]3− shows optical isomerism.
Reason (R): Optical isomerism is common in octahedral complexes involving didentate ligands.
Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers:
[Pt(NH3)(H2O)Cl2 ]
Indicate the types of isomerism exhibited by the following complexes and draw the structure for isomers:
\[\ce{[Pt(NH3)(H2O)Cl2]}\]
Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers: [Pt(NH3)(H2O)Cl2]
Indicate the types of isomerism exhibited by the following complex and draw the structure for these isomer: \[\ce{[Pt(NH3)(H2O)Cl2]}\]
Indicate the types of isomerism exhibited by the following complexes and draw the structure for these isomer:
\[\ce{[Pt(NH3)(H2O)Cl2]}\]
Indicate the types of isomerism exhibited by the following complex and draw the structure for this isomer:
\[\ce{[Pt(NH3)(H2O)Cl2]}\]
