Organometallic ChemistryCyclopentadienides (C5H5- ligand)Preparation: Structure:
Also in+2 Oxidation State
Alkyls & Aryls- s-bonded alkyls & aryls
- from metathesis in ether/thf
- R = phenyl probably polymeric
- R = CH2CMe3 stable as LnR3(thf)2
- [LnMe6]3- have been isolated for most Ln
Mixed Alkyl Cyclopentadienides- C5Me5 (Pentamethyl-cyclopentadienyl) is a common organo-Ln ligand
Mechanism of Methane Activation?Cycloctatetraenide M3+(C8H82&endash;)2 Sandwich CompoundsPreparation: Structure: - pale green crystals
- paramagnetic
- air & moisture sensitive
- planar COT rings
- staggered D8d conformation
- solvated K+ interacts symmetrically with one COT ring
ArenesLanthanide Bis-Arene 'sandwich' compounds - prepared by metal vapour synthesis (MVS) techniques
- stable at ambient temperature
- Ln0 - such compounds could not be expected for LnIII with contracted 4f orbitals
For more on Lanthanide Organometallics see: R.D. Köhn et al, in Encyclopedia of Inorganic Chemistry, ed. R.B. King pp. 3618-3666 Bibliography [textbook & online resources] |