Organometallic compounds: synthesis, bonding and reactions including oxidative addition and reductive elimination - Question Bank
1. Organometallic compounds are crucial in the development of new materials because they can serve as precursors for:
2. Which of the following is a common starting material for the synthesis of many organometallic compounds via direct reaction with metals?
3. In the Wacker process, a key step involves the conversion of an alkene to an aldehyde or ketone. This transformation is facilitated by organopalladium intermediates, which undergo reactions like:
4. The synthesis of Wacker process catalysts, used for olefin oxidation, involves organometallic complexes of which metal?
5. What is the term for an organometallic compound where the organic group is bonded to the metal through a carbon atom that is part of a double or triple bond?
6. The C-H activation reaction, a key step in some catalytic cycles, involves the breaking of a C-H bond and formation of metal-carbon and metal-hydrogen bonds. This is often a form of:
7. Which type of organometallic compound typically exhibits high thermal stability and is used in material science?
8. What is the 'ligand substitution' reaction in organometallic chemistry?
9. Organometallic compounds containing alkali metals (e.g., R-Li) are generally:
10. Which factor generally increases the polarity of the metal-carbon bond in organometallic compounds?
11. The carbonylation reaction, often catalyzed by organometallic complexes, involves the insertion of what molecule?
12. Which of the following organometallic compounds is known for its use as an anti-knock agent in gasoline (though now largely phased out)?
13. Consider the reaction: LnM(CO)(R) -> LnM(COR). This is an example of:
14. In the context of organometallic reactions, what is a 'migratory insertion' reaction?
15. What is the primary role of ligands in stabilizing organometallic complexes?
16. The reactivity of organometallic compounds is largely due to the polarity of the metal-carbon bond and the ability of the metal to:
17. Which of the following is a potential hazard associated with certain organometallic compounds?
18. What type of reaction is involved when a metal-alkyl bond is formed by transferring an organic group from one metal to another?
19. The synthesis of dimethylgold(III) chloride from gold(III) chloride and methylmagnesium chloride is an example of:
20. A ligand with hapticity η5 indicates that it is bonded to the metal through how many of its atoms?
21. The term 'hapticity' (η) in organometallic chemistry refers to:
22. Which of the following is NOT a typical ligand in organometallic chemistry?
23. The 18-electron rule is a guideline used to predict the stability of organometallic complexes. It states that stable complexes typically have:
24. What is the primary function of organometallic compounds in Ziegler-Natta catalysis for olefin polymerization?
25. The synthesis of Ziegler-Natta catalysts, used in polymerization, involves organometallic compounds of which metals?
26. Wilkinson's catalyst, RhCl(PPh3)3, is primarily used for:
27. Which of the following is a well-known example of a homogeneous catalyst involving organometallic complexes?
28. What is the role of organometallic compounds in homogeneous catalysis?
29. Which of the following is a crucial reaction in many organometallic catalytic processes, involving the formation of a new M-C bond?
30. In catalytic cycles, oxidative addition and reductive elimination are often:
31. Which of the following pairs of ligands are most likely to undergo reductive elimination?
32. Consider the reaction: LnM(X)(Y)(R) -> LnM-R' + X-Y. This reaction is an example of:
33. Reductive elimination typically involves the formation of a new bond between two ligands previously bound to the metal center. This process:
34. What is the term used to describe the removal of two groups from a metal center, decreasing its coordination number and oxidation state?
35. Consider the reaction: LnM-R + X-Y -> LnM(X)(Y)(R). This reaction is an example of:
36. In oxidative addition, the oxidation state of the metal center typically:
37. Which of the following reactions is characteristic of organometallic complexes, particularly in catalytic cycles?
38. What is the term used to describe the addition of a group to a metal center, increasing its coordination number and oxidation state?
39. What is the formal oxidation state of iron in ferrocene?
40. The synthesis of ferrocene typically involves the reaction of cyclopentadienyl anion with which metal compound?
41. Ferrocene, with its sandwich structure, is a classic example of which type of organometallic compound?
42. Which of the following is an example of a pi-complex organometallic compound?
43. In organometallic chemistry, what does the term 'ligand' refer to?
44. Organolithium compounds (R-Li) are generally more reactive than Grignard reagents (R-MgX). What is the primary reason for this difference in reactivity?
45. Which of the following is a common method for synthesizing organometallic compounds?
46. Grignard reagents are a class of organometallic compounds with the general formula R-Mg-X. What type of bond is present between Mg and R?
47. Which element is typically NOT considered to form organometallic compounds?
48. What type of bonding is predominantly observed between the metal and carbon atoms in organometallic compounds?
49. Which of the following is a characteristic feature of organometallic compounds?