TM-η-Cyclopentadiely Complexes Flashcards
1
Q
Structures
A
Metallocenes, bent metallocenes or half-sandwich complexes
2
Q
Synthesis
A
Cp- from heating C10H12 dimer then reduced with Na, Cp- reacted with anhydrous metal salt
3
Q
Cp
A
L2X occupies 3 coordination sites
4
Q
1st row metallocenes structures and bonding
A
Approx octahedral geometry, dxy/dx2-y2 BMO destabilised through π-back donation, dz2 approx NBMO and dxz/dyz ABMO
5
Q
Key reactions ferrocene
A
EAS eg Friedel-Crafts acylation and metallation with lithium alkyls
6
Q
Bent metallocene structure
A
Cp rings no longer co-planar so dz2/dx2-y2/dxy rehybridise to give 3 hybrid MO in a plane
7
Q
Cp*
A
C5Me5, twice the size of Cp and more e- donating
