Classification of Organometallic Compounds (alkyls, carbonyls, metallocenes)
Start with the big picture
Alkyl complexes contain metal–carbon σ bonds to sp³ carbon donors. Their stability is linked to β-hydrogens and steric bulk: β-hydride elimination can be a decomposition pathway, while bulky or β-hydrogen-free groups can improve stability. Carbonyls feature metal–CO interactions combining σ donation and π acceptance; their bonding can be examined through changes in CO stretching frequency. Metallocenes are sandwich complexes with π-bound cyclopentadienyl rings, each donating six electrons. These classes differ in bonding, electron counting, sensitivity, and characteristic chemistry. The deeper lesson develops their structures and examples alongside preparation routes, reactivity patterns, and applications, including catalysis.
What you'll learn
- Distinguish alkyl, carbonyl, and metallocene complexes by ligand and bonding mode.
- Explain how β-hydrogens and steric bulk affect alkyl-complex stability.
- Describe CO donation, back-donation, and the related IR trend.
- Recognize metallocene sandwich structures and the cyclopentadienyl ligand’s electron donation.
- Compare representative synthesis routes and applications across the three classes.
Continue your study
Work through the complete notes and reinforce the topic with the study tools available in the full lesson.
