Electron Counting - Electrons Donated By Common Fragments

Electrons Donated By Common Fragments

Ligand Electrons contributed
(neutral counting)
Electrons contributed
(ionic counting)
X 1 2 (X-; X = F, Cl, Br, I)
H 1 2 (H-)
H 1 0 (H+)
O 2 4(O2-)
N 3 6 (N3-)
NR3 2 2 (NR3; R = H, alkyl, aryl)
CR2 2 4 (CR22-)
Ethylene 2 2 (C2H4)
cyclopentadienyl 5 6(C5H5-)
benzene 6 6 (C6H6)

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