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Questions and Answers
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-?
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+?
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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+?
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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?
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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?
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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?
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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?
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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?
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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?
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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?
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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?
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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.
