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Mobile App Chapter 23: Q76P (page 1022)
For any of the following that can exist as isomers, state the type of isomerism and draw the structures:
[CO(NH3)5Cl]Br2
[Pt(CH3NH2)3Cl]Br
[Fe(H2O)(NH3)2]2+
Short Answer
The 3 chemical structures given in the questions show isomerism. They exist as geometric (cis-trans) isomers and coordination isomers.
[CO(NH3)5Cl]Br2 - coordination isomerism
[Pt(CH3NH2)3Cl]Br -coordination isomerism
[Fe(H2O)(NH3)2]2+ -Geometric (cis-trans) isomerism
Step by step solution
Concept Used – Isomerism
Definition of different kinds of isomers
- Constitutional (structural) isomers - same formula, differently connected atoms; they can occur in two types:
- Coordination isomers - they occur when the structure of the whole compound is the same, but the structure of complex ion is different
- Linkage isomers - they occur when the structure of the complex ion is the same, but the donor atom that which ligand uses is different
- Stereoisomers - they have the same connections between atoms, but the atoms have different spatial arrangements; they occur in two types:
- geometric (cis-trans) isomers - different spatial arrangements of atoms or groups, relative to the central metal ion.
2.2 Optical isomers - they occur when a molecule cannot be superimposed with its mirror image.
Elucidation of type of isomerism and structure
[CO(NH3)5Cl]Br2 - coordination isomerism
it can be [CO(NH3)5Cl]Br2 or [CO(NH3)5Br]BrCl
Elucidation of type of isomerism and structure
[Pt(CH3NH2)3Cl]Br - coordination isomerism
it can be [Pt(CH3NH2)3Br]Cl or [Pt(CH3NH2)3Cl]Br
Elucidation of type of isomerism and structure
[Fe(H2O)4(NH3)2]2+- Geometric (cis-trans) isomerism
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