Which of the following is NOT a catalytic strategy used by carbonic anhydrases? a. metal ion catalysis b. catalysis by approximation c. Acid-base catalysis d. Formation of covalent intermediate
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Which of the following is NOT a catalytic strategy used by carbonic anhydrases?
metal ion catalysis
catalysis by approximation
Acid-base catalysis
Formation of covalent intermediate
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- Reaction intermediates differ from activated complexes in that: a. they are molecules with normal bons rather than partial bonds and can occasionally be isolated. b. all reactions involve reaction intermediates but not all have activated complex c. they are intermediate structures which have characteristics of both reactants and products d. they are unstable and can never be isolatedAssociative interchange mechanism is encountered in O a. early transition states. а. O b. actinoids c. lanthanoids O d. late transition statesWhich of the following are purposes of the work-up followng a chemical reaction? A. To accelerate the formation of product. OB. To shift the equilibrium towards the products. To quench the reactive species in the mixture. C. - D-To provide separation of side products from the desired products.
- Associative interchange mechanism is encountered in а. lanthanoids b. actinoids C. early transition states. d. late transition statesAn example of a heterogeneous catalyst is: a. Wilkinson’s catalyst for the hydrogenation of alkenes b. Grubb’s catalyst with varied substituents for olefin metathesis in THF c. Pt and Pd nanoparticles on ceramic honeycombs in catalytic converters d. Pd(PPh3)4 in toluene solvent used for Miyaura-Suzuki coupling reactionsExplosions occur when the rate of reaction increases dramatically over a short period of time. There are several types of explosions such as autocatalytic explosions, thermal explosions and branched chain explosions. a. Briefly discuss how the thermal explosion and branched chain explosion occur.
- Explain reason behind your option 1.All the following parameters would affect the rate and kinetics of the reaction exceptA.Solvent mediumB.Reaction temperatureC.Reaction timeD.Geometry and structure of the alkyl halideE.pH7. With Examples, discuss the following A. cis-Elimination B. Reductive Elimination C. Oxidative Addition D. Insertion and Deinsertion E. Nucleophilic Addition to LigandExplain your reason for the answer1.All the following parameters would affect the rate and kinetics of the reaction exceptA.Solvent mediumB.Reaction temperatureC.Reaction timeD.Geometry and structure of the alkyl halideE.pH
- What term most accurately describes the process below? a. hydrogen abstraction b. halogen abstraction c. initiation d. coupling5. what is the relative size of activation energy (Ea) for each reaction? 6. what is the Hammond's postulate? 7. what are the Relative thermodynamic stability of the reactive intermediates? 8. what is Influence of the solvent (if given) on the reactions and intermediates?For a copolymerization of A and B, the copolymerization plot is shown below. What could be reasonable values of reactivity ratios of A and B? Please explain your answer in detail and why you picked the reactivity ratios that you did. 1.00 0.80 0.60 0.40 0.20 0.00 0.2 0.4 0.6 0.8 1 fa