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Questions and Answers
What is the rate-determining step in the base hydrolysis of [Co(NH3)5Cl]2+?
What is the rate-determining step in the base hydrolysis of [Co(NH3)5Cl]2+?
Which of the following mechanisms is involved in the reaction of [Co(NH3)5Cl]2+ with OH-?
Which of the following mechanisms is involved in the reaction of [Co(NH3)5Cl]2+ with OH-?
What is the coordination number of the complex [Co(NH3)4(NH2)]2+ in the proposed mechanism?
What is the coordination number of the complex [Co(NH3)4(NH2)]2+ in the proposed mechanism?
What is the role of the OH- ion in the base hydrolysis of [Co(NH3)5Cl]2+?
What is the role of the OH- ion in the base hydrolysis of [Co(NH3)5Cl]2+?
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Which of the following is a characteristic of the exchange dissociation mechanism?
Which of the following is a characteristic of the exchange dissociation mechanism?
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What is the overall reaction in the base hydrolysis of [Co(NH3)5Cl]2+?
What is the overall reaction in the base hydrolysis of [Co(NH3)5Cl]2+?
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What is the characteristic of the carrier ligand in the inner sphere mechanism?
What is the characteristic of the carrier ligand in the inner sphere mechanism?
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In which type of mechanism does the transfer of an electron occur through a ligand forming a bridge between two reacted complexes?
In which type of mechanism does the transfer of an electron occur through a ligand forming a bridge between two reacted complexes?
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Which mechanism does not require a bridging group for the transfer of an electron?
Which mechanism does not require a bridging group for the transfer of an electron?
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What occurs at the end of the inner sphere mechanism reaction?
What occurs at the end of the inner sphere mechanism reaction?
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Why is the reaction rate faster in the outer sphere mechanism compared to the inner sphere mechanism?
Why is the reaction rate faster in the outer sphere mechanism compared to the inner sphere mechanism?
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What is the minimum distance required for the electron to jump in the outer sphere mechanism dependent on?
What is the minimum distance required for the electron to jump in the outer sphere mechanism dependent on?
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What is the transfer time of electrons in the reaction of coordination compounds?
What is the transfer time of electrons in the reaction of coordination compounds?
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What is the bond between the ligand and metal in the original complex like in the inner sphere mechanism?
What is the bond between the ligand and metal in the original complex like in the inner sphere mechanism?
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What is the most common rate law in a reaction?
What is the most common rate law in a reaction?
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What is the rate law equation for a first-order reaction?
What is the rate law equation for a first-order reaction?
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What is the characteristic of a zero-order reaction?
What is the characteristic of a zero-order reaction?
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What is the type of reaction in which a ligand of a coordination compound is replaced by another ligand?
What is the type of reaction in which a ligand of a coordination compound is replaced by another ligand?
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Why is metal substitution reaction in complex very rare?
Why is metal substitution reaction in complex very rare?
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What is the type of mechanism that involves the formation of an activated complex by the direct reaction of the metal ion with the incoming ligand?
What is the type of mechanism that involves the formation of an activated complex by the direct reaction of the metal ion with the incoming ligand?
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What is the type of mechanism that involves the formation of an activated complex by the reaction of the metal ion with the solvent molecule?
What is the type of mechanism that involves the formation of an activated complex by the reaction of the metal ion with the solvent molecule?
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What is the type of reaction that involves the transfer of one or more electrons from one species to another?
What is the type of reaction that involves the transfer of one or more electrons from one species to another?
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Study Notes
Exchange Dissociation Mechanism
- The mechanism involves the exchange of a ligand (L') with a metal complex (ML6) to form a new complex (ML5L' + L)
- Rate law: d[ML6]/dt = Kk[ML6][L] / (1 + K[L])
- Under usual experiment conditions, rate law reduces to d[ML6]/dt = Kk[ML6][L]
Base Hydrolysis of Complex
- The reaction involves the hydrolysis of a metal complex ([Co(NH3)5Cl]2+) with OH- to form a new complex ([Co(NH3)5OH]2+)
- Rate law: rate = k[Co(NH3)5Cl2+][OH-]
- Proposed mechanism involves the formation of an intermediate ([Co(NH3)4(NH2)Cl]+) which then dissociates to form the final product
- Rate-determining step is the dissociation of the intermediate
Reaction of Coordination Compounds
- There are two types of mechanisms in reduction-oxidation reactions: inner sphere and outer sphere
Inner Sphere Mechanism
- Involves the transfer of an electron through a bridging ligand
- The bridging ligand exists in the reducing complex and has at least two pairs of lone pair electrons
- The characteristic of the carrier ligand is that it can form a bridge between two complexes
- The bond between the ligand and metal in the original complex is broken after the electron transfer process is finished
Outer Sphere Mechanism
- Involves the transfer of an electron without a bridging group
- The rate of reaction depends on the approaching distance of the reactant molecules
- Reaction occurs faster than inner sphere mechanism because no movement of atoms is required
Kinetics and Mechanism of Coordination Compounds
- Kinetics is the study of the rate of a reaction
- Rate law equation: rate = k[A]a[B]b
- Common rate laws: zero order, first order, and second order
- A reaction's mechanism determines its rate law
Reaction of Coordination Compounds
- Coordination compounds undergo two types of reactions: substitution and redox reactions
- The rate and mechanism of the reaction depend on the behavior of the metal present in the complex
Substitution Reaction
- There are two types of substitution reactions: ligand substitution and metal substitution
- Ligand substitution is similar to SN reaction, while metal substitution is similar to SE reaction
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Description
This quiz covers the exchange dissociation mechanism, including the rate law and its reduction under certain experimental conditions. It's a key concept in chemistry and chemical reactions.
