Organometallics Flashcards
1
Q
Polarity of Organometallics
A
M+C-
2
Q
Structure of LiR and NaR with small R
A
Tetrameric with distorted cubic structure
3
Q
Structure of LiR and NaR with large R
A
Hexamers
4
Q
Bonding in M-cyclopentadienyls
A
M = Li/Na = linear polymeric chan structure
M = K = zig-zag structure
Degree of zig-zag increases with size of M+
5
Q
Reactions of LiR
A
Base and nucleophile
6
Q
Why is Bu- in LiBu hexamer not as acidic as expected
A
Not a free anion
7
Q
Schlenk equilibrium
A
2RMgX ⇌ MgR2 + MgX2
This mixture functions like a grignard
8
Q
How is the Schlenk equilibrium manipulated
A
Adding 1,4-dioxane which forms precipitate with MgX2
9
Q
How to increase reactivity of LiR
A
Add tmeda
10
Q
How do KR and NaR react with ethers
A
Ether cleavage
