Rank by stability of arenium ion (also called sigma complex) upon bromination. The renium ion that is the most stable is 1, while the arenium ion that is the least stable is 5. A Para Br -H -H Met Para -H Br Br Br H Metc Br H
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- The coloriesS supe atanliquid was so 11. How does the addition of H3O* affect the following reaction equilibrium? 2CrO42- (aq, yellow) + 2H3O* (aq) -> Cr2O7²- (aq, orange) + 3H2O (1) a. The reaction shifts to the right and the concentration of CrO42- increases. b. The reaction shifts to the right causing the concentration of Cr2072 to decreases and the solution to turns yellow. c. The reaction shifts to the right resulting in a reduction in the concentration of H3O* and an increase in the concentration of Cr2O,2. d. The reaction shifts to the left and the concentration of CrO42 increases. e. The reaction shifts to the left and the concentration of CrO42 decreases.5) Consider the rhodium complex below. Reaction with 1 equivalent of oxygen gas oxidizes the metal centre and gives a new complex with cis, distorted octahedral geometry. Draw the structure of the product and give the oxidation state, valence electron count, and d-electron count for both rhodium complexes. Ar 1 eq. O2 Ph3P. Rh Ph3P -"Bu ?What is the mechanism by which the following reaction occurs ?: [Ru(NH3)6]2+ + [Fe(H2O)6]3+ → [Ru(NH3)6]3+ + [Fe(H2O)]2+ Select one: a. Dissociative mechanismb. Inner sphere mechanismc. External sphere mechanismd. Associative mechanism
- Which of the following classes of ligands has the strongest trans effect? а. A o-acceptor ligand b. A Tt-acceptor ligand С. A o-donor ligand d. A Tt-donor ligand1. Arrange the following in order of increasing molar absorptivity ɛ, and explain your ordering. a. A d-d transition in [Fe(H2O)6]* b. A d-d transition in [FeCl4] I. c. A d-d transition in [Ni(H2O)6]** d. A d-d transition in [VCL4]²-Fill in the catalytic intermediates and provide number of electrons and provide oxidation state of the metal PPh, Pd. PPh PhyP. PPh, ligand dissociation 2 PPhy OMe Ph,P-Pd-PPhg product electron count: oxidative addition reductive elimination oxidation state: electron count: transmetallation KOIBU NH
- Which of the following complexes obeys the 18-electron rule. Show the electron count clearly. CI CI Rú Rú PhPm oc PPha b) Choose one type of organometallic reactions and find an example (not from the slides) and explain how this example belongs to this type.In an inner-sphere electron transfer reaction, which of the following ligands would be the "worst" as a bridging ligand, resulting in a very slow reaction rate? а. O b. NCS- с. CI d. NH3Three peaks are observed at 9000, 14500 and 24500 cm-1 in the [Ni(H2O)6]2+ uv-vis spectrum. What is the crystal field stability energy of this complex in kJ/mol? A. -352 B. -293 C. -108 D. -129 E. -211
- Write the name for [CoBrCl(H2O)(NH3)]I. Group of answer choices ammineaquabromochloroiodocobaltate (II) ammineaquabromochlorocobalt (II) iodide ammineaquabromochlorocobalt (III) iodide ammineaquabromochlorocobaltate (III) iodide ammineaquabromochloroiodocobalt (II) ammineaquabromochloroiodocobaltate (II) ammineaquabromochloroiodocobalt (III) ammineaquabromochloroiodocobaltate (III)Select the correct statmenet(s) for Ansa complex `MLn A. The link helps only in the bonding of the cyclopentadienyl ligand B. The link modifies the structure and reactivity of the metal center C. Ansa bridge allows greater control of the stereochemistry at the metal center D. ansa-metallocenes are used in polymerization reactions E. Ansa-metallocenes can't bind an alkene molecule O A and E ОВ,Сand D ОА, В, С and D O D and E. For the following organometallic complexes, determine the metal oxidation state, the metal d electron count, and the overall complex electron count. a. OC. OC Re CH3 b. e. Ph3P Ph3P OC. OC Pd PPh3 CH3 H. PPh3 C. f. OC OC Et3P Et3P PPh3 Fe PPh3 PEt3 CO PEt3