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Questions and Answers
Which metal complex is mainly d8 in square planar coordination?
Which metal complex is mainly d8 in square planar coordination?
- Rh(I)
- Ni(II) (correct)
- Ir(I)
- Pd(II)
What type of mechanism do square planar complexes generally react with more than octahedral complexes?
What type of mechanism do square planar complexes generally react with more than octahedral complexes?
- Radical mechanism
- Electrophilic aromatic substitution mechanism
- Associative mechanism (correct)
- Dissociative mechanism
What factor affects the rate of substitution in square planar metal complexes related to the entering group?
What factor affects the rate of substitution in square planar metal complexes related to the entering group?
- Electronegativity
- Steric hindrance (correct)
- Hydrogen bonding
- Resonance stabilization
In the general rate law of substitution reactions at square planar metal complexes, what does the second part of the rate equation represent?
In the general rate law of substitution reactions at square planar metal complexes, what does the second part of the rate equation represent?
Which metal complex's reactions were studied to prove that square planar complexes react with associative mechanism more than octahedral complexes?
Which metal complex's reactions were studied to prove that square planar complexes react with associative mechanism more than octahedral complexes?
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Study Notes
Square Planar Metal Complexes
- The metal complex that is mainly d8 in square planar coordination is Ni(II) and Pd(II).
- Square planar complexes generally react with a dissociative interchange (I_d) mechanism, which is faster than the dissociative (D) mechanism in octahedral complexes.
- The nucleophilicity of the entering group affects the rate of substitution in square planar metal complexes.
- In the general rate law of substitution reactions at square planar metal complexes, the second part of the rate equation represents the formation of the transition state.
- The reactions of Pt(II) complexes were studied to prove that square planar complexes react with an associative mechanism more than octahedral complexes.
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