Quizzes_ch_20-21

Quizzes_ch_20-21 - Shriver Ch 20 Coordination Chemistry:...

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Shriver Ch 20 Coordination Chemistry: Reactions of Complexes 1. The formation constant, K f , of a complex indicates: a. the rate at which a complex is formed from the metal ions and the ligands b. the strength of the complex c. the rate at which the complex enters in chemical reactions 2. How is a large K f interpreted? a. The incoming ligand binds to the metal ion more strongly than the solvent, water. b. The incoming ligand binds to the metal ion less strongly than the solvent, water. c. The incoming ligand has no binding affinity to the metal ion. 3. What is the normally expected order of arrangement of stepwise formation constants and what does a deviation from this order signify? a. K f1 > K f2 > … > K fn ; deviations from this order are not related to the structure. b. K f1 < K f2 < … < K fn ; deviations from this order signify a major change in structure. c. K f1 > K f2 > … > K fn ; deviations from this order signify a major change in structure. 4. A reaction sequence in which an intermediate of reduced coordination number is formed by the departure of the leaving group is called: a. an associative mechanism b. a dissociative mechanism c. an interchange mechanism 5. How does one obtain a measure of the responsiveness of a square planar complex to the nucleophilicity of the entering group? a. by calculating the R 2 of the log k 2 (Y) versus the n Pt (Y) line b. by calculating the intercept of the log k 2 (Y) versus the n Pt (Y) line c. by calculating the slope of the log k 2 (Y) versus the n Pt (Y) line 6. The rate-determining step in octahedral complex substitution is believed to be: a. an associative mechanism b. a dissociative mechanism c. an interchange mechanism
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Quizzes_ch_20-21 - Shriver Ch 20 Coordination Chemistry:...

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