Catalytic oxidations using cobalt(II) complexes - Advances in Catalytic Activation of Dioxygen by Metal Complexes - page 274

3.4 Nitrogen monoxide

reacts with nitrogen monoxide to give the
nitrosyl complex where is a
dinucleating macrocycle, having a salen- and a saldien-like metal binding
site (Figure 10). The Co occupies the salen and the Pb the saldien site

(Figure 11) 34 .