The monomeric hydroxides M{C6H3-2,6-(CH2PiPr2)2}(OH) (M = Ni, Pd) react with carbon monoxide, giving rise to the binuclear CO2 complexes [M{C6H3-2,6-(CH2PiPr2)2}]2(μ-CO2-κ2 C,O) (M = Ni, Pd). The formation of the Pd derivative takes place via the mononuclear species Pd{C6H3-2,6-(CH2PiPr2)2}(COOH), which is stable under a CO atmosphere but reversibly loses CO and H2O on attempted isolation.

Bis(pyridine)iron dialkyl complexes FeR2Py2 (R = CH2Ph, CH2CMe2Ph, and CH2SiMe3) react with 2,6-diiminopyridine ligands, affording the corresponding organoiron complexes. The complex Fe(CH2SiMe3)2(C5H3N-2,6-(C(N-mesityl)Me)2, 4a, becomes an active ethylene polymerization catalyst upon treatment with Al or Zn alkyls. A catalytically active 1:1 Fe/Al adduct has been detected in solution by 1H and UV−vis spectroscopies.