. (8 pts.) Consider the stereochemical changes that accompany the dissociation mechanismsfor ligand substitution reactions involving complexes of the form A-cis-[M(LL)2BX]. Thethree possible 5-coordinate intermediate ligand arrangements are shown. Draw all reactionpathways that lead to A product isomers.XB-BB- X-XB+ Y- XBдо+ Y+ Y??

Pathway 1X dissociates from an axial position.Y adds to the same axial position.Result: Λ product…

Answered: . (8 pts.) Consider the stereochemical…

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter24: Catalytic Carbon-carbon Bond Formation

Section: Chapter Questions

Problem 24.22P

See similar textbooks

Similar questions

(6 pts.) Consider a kinetics study of the following ligand substitution reaction: trans-[Rh(en)2C12]* + 2 Y¯ ⇒ trans-[Rh(en)2Y2]* + 2 CI¯¯ When Y=I, Br, and NO2, the reaction rate constants are 5.2 x 10-5, 4.0 x 10-5, and 4.2 x 10-5 M¹ s¹, respectively. By which mechanism does this reaction most likely proceed? Justify your answer.
-R -R N- H-B: H-B R R NCCD3 + CH2CI2 N. CICH2CI CD;CN CH3 CH3 R. A B A similar iridium complex was studied. It was found that the reaction with a Tp ligand where R = Me occurred with a very high rate (tsp< 5 s at0 °C), while the unsubstituted Tp complex had a much slower ligand substitution rate (tap = 75 min at room temp). Based on this result, does this complex undergo ligand substitution by the same mechanism as the ruthenium complex, or by another mechanism. Explain.
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 ?
[2] For the following pair of compounds, identify the most thermodynamically stable complex mentioning the reason: ÇI NH3 H3N- OR H3N NH3 (a) Br H3N- NH3 H3N- -NH3 Co OR HN NH3 H3N NH3 NH3 NH3 (b)
9) Reaction of 1 methyl 4-Bromobenzene with fuming HNO3/ H2SO4 yields a tri substituted product. Circle the most stable sigma complex which would yield the product. Br Br Br H NO₂ Br H NO₂ H NO₂ Br H NO₂ + H NO₂
Below are the resonance structures of the sigma complex that is formed when the para position of nitrobenzene attacks a nitronium Ton. Which resonance structure is responsible for the instability of this sigma complex (relative to the sigma complex generated from meta-attack). NO₂ 8-6-6 NO₂ NO₂ NO₂ 1 11 01 O II O III O None of the choices are correct. NO₂ NO₂ |||
List the cobalt complexes in order of increasing Kstab values. Using one of the cobalt(II) complexes as an example, identify what the Kstab value represents and hence justify your order of stability above.
(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(5-C5Me5)2(Me)][SbF6] B Co(n5-Cp)z C TaMe5 D [Cr(n-C6H6)2]* E ZnPh2
3. a. (i) Starting from K₂[PtC14], plan synthetic routes to the two complexes A and B shown below, using your knowledge of the trans effect. Formulate each step by drawing structures of each complex and give a full explanation for your choices. Make sure to assign the correct charges to each complex in each case. 7- 7- (ii) NCS NH₂ -Pt-Br CI NO₂ CI-Pt-OH CO B Write a detailed discussion of the two factors that may contribute to the overall trans-directing ability of a particular ligand, considering thermodynamic and kinetic aspects. Use appropriate examples and orbital sketches to support your explanations.
3. Which complex shows lower C-O stretching frequency, [Ni(acac)2(H2O2 or [Ni(acac)a]? Explain.
Solve both parts otherwise I'll downvote you
1. 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-

SEE MORE QUESTIONS

Recommended textbooks for you

Organic Chemistry

Chemistry

ISBN:

9781305580350

Author:

William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:

Cengage Learning

Organic Chemistry

Chemistry

ISBN:

9781305580350

Author:

William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:

Cengage Learning

SEE MORE TEXTBOOKS