Consider the following reaction (DPPE structure below): F. - B(OH)2 F Ni(OTf)2 DPPE K2CO3 (a) Give the product of the reaction and suggest a plausible catalytic cycle giving the number of d-electrons and the oxidation state of Ni in each intermediate.
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- Consider the following reaction (DPPE structure below): B(OH)2 F. Ni(OTf)2 DPPE K2CO3 (a) Give the product of the reaction and suggest a plausible catalytic cycle giving the number of d-electrons and the oxidation state of Ni in each intermediate.Identify the following reactions by type and predict the products (any 4): (i) (ii) (iii) (iv) (v) Pt(O2) (PPH3)2 + 2CS2 RhH(CO)(PPH3)3 + C,F4 [C,H,Mn (CO);]* +H CH;Mn(CO); + C,H;NH, IrCl(PMe;)3 + HCO2. Consider reaction-4 in the procedure: (a) How is the reaction between MnO4 and I in basic solution different from the one in acidic solution? What is the distinctive color formed in the cyclohexane layer for the reaction in acidic solution? (b) How can you tell that I2 was not formed in the reaction of MnO4 with I in basic solution? (c) For the reaction in basic solution, I- is oxidized to IO; , while MnO4 is reduced to the manganate ion, MnO,?. Write a balanced net ionic equation for this redox reaction.
- Write the equations involved in the following reactions:(i) Wolff-Kishner reduction(ii) Etard reactionA cobalt(II) salt was dissolved in water and reacted with excess acetylacetone (1,2-pentanedione, CH3 COCHCOCH3 ) and hydrogen peroxide. A green solid was formed that gave the following results for elemental analysis: C, 50.4 per cent; H, 6.2 per cent; Co, 16.5 per cent (all by mass). Determine the ratio of cobalt to acetylacetonate ion in the product.3. Reaction of [(CH2=CH2)2RHCI]2 (A) with two equivalents of a phosphine ligand under nitrogen results in displacement of ethylene by phosphine. With triethylphosphine, the reaction yields a dimer, [RhCl(PET3)2]2.(B). With 'Pr°P, a monomeric N2 complex is formed, RHCI(N2)(P'Pr3)2].(C). Draw structures of A, B and C. Explain why different results are seen with the two different phosphines.
- 1 Provide a reagent and name the reaction mechanism to form the following metal hydrides from their starting materials. a) Cp,WH2 b) (Cp,WH;) L.CrCl2 L,CrH2 c) Cp 2ZrMe2 Cp"2ZrH2(a) What is the product of the following reaction? What is the catalytically active Pd species, and how is it formed? Draw a catalytic cycle, explaining what type of reaction is occurring at each stage. Indicate the formal oxidation state of Pd for each intermediate in the catalytic cycle, state how many valence electrons each intermediate has, and indicate the geometry of each Pd complex. Why is LiCl necessary? OTf OMe + Me. SnBu3 cat. PdCl₂(PPh3)2 NEt3, LICI, THE1)Predict reaction products for the reaction:[Cp2W(n3-C3H5)](2BF4) + 2 Meli → 2)Write the reactions and products. (CO)5W=CMe(OMe) is reacted with: 1)PhLi followed by HCl at low temperature and 2) Buli
- (a) Give the formal oxidation number and the d-electron count of the transition element and the total number of valence electrons in metal complexes A - E. (C5Me5 = pentamethylcyclopentadienyl, 1,5-COD = 1,5-cyclooctadiene) A Ti(1³-C5Me5)2(1²-C₂H4) B_V(n-Cp)z C Nb(=CHCMe3)(CH₂CMe3)3 D Pt(1,5-COD)Me2 E ZnEt₂The reaction of iron powder with carbon monoxide allows isolation of a complex (X) with the molecular formula FeCsO5. Reaction of complex (X) with Ph,PCH2CH2PPH2 in tetrahydrofuran gives a complex (Y) with molecular formula of FeC29H24O3P2. Draw the structures of (X) and (Y).Define the following phenomena with reference to main group compounds: (c) dependence of acidity and basicity on oxidation state