Pd
Cl
N
N
N
5-Pd
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
S
N
N
N
N
N
N
N
N
N
N
N
N
N
NH
HN
S
SH
N
N
N
N
N
N
N
N
N
N
O
N
2-Fe
96-Ag
97-Cd
3-Au
98-Pd
4-Ru
99-Cu
100-Ru
101-Co
102-Au
103-Ag
104-Pd
N
N
N
N
N
105-Pd
106-Pd
107-Pd
108-P
Pd
Fe
Br
Ag
Cd
Cl
Au
Pd
Cl
Ru
Cu
Co
Au
Ag
Ag
Pd
Pd
P
Cl
R
R
Cl
CO
Scheme 54 Carbaporphyrinoids and metallocarbaporphyrinoids from the “pincer ligand perspective” (pincer ligand pattern in bold blue, perimeter substitution omitted for clarity)
220
K. Hurej and L. Latos-Grażyński