electrons donated
1
2
3
3-allyl
propenyl =
4
cyclopentadiene
= 
5
6
cycloheptatriene = 
7
8
Ligand Classification
| Number of electrons donated |
Name | Example |
|
1 |
yl | methyl, ethyl, phenyl = |
|
2 |
ene | ethene = |
|
3 |
enyl | 3-allyl
propenyl = |
|
4 |
diene | butadiene = cyclopentadiene
= |
|
5 |
dienyl | cyclopentadienyl = C5H5 |
|
6 |
triene | benzene =
cycloheptatriene = |
|
7 |
trienyl | cycloheptatrienyl = |
|
8 |
tetraene | cyclooctatetraene = |
