Oxygen donor ligands,

Plutonium(III), (IV), and (VI) complex stabiUty constants have been determined for some oxygen-donor (carboxylate) (114) and a few nitrogen-donor (115,116) ligands. Complexes of plutonium with natural complexants such as humic acids have also been studied extensively (89). 

Dipotassium phthalocyanine (PcK2) can be prepared analogously to the dilithium compound by refluxing phthalonitrile and potassium pentoxide in pentan-l-ol.58 With additional oxygen-donor ligands (e.g., crown ethers) it forms crystals with the potassium bulging outside of the phthalocyanine ring.133134... 

Complexes of the lanthanides with neutral oxygen donor ligands. D. K. Koppikar, P. V. Sivapul-laiah, L. Ramakrishnan and S. Soundararajan, Struct. Bonding (Berlin), 1978, 34,135-213 (406). 

Structural aspects and coordination chemistry of metal porphyrin complexes with emphasis on axial ligand binding to carbon donors and mono- and di-atomic nitrogen and oxygen donors. P. D. Smith, B. R. James and D. H. Dolphin, Coord. Chem. Rev., 1981,39, 31-75 (170). 

Complexes of Mercury(l) with Oxygen-Donor Ligands. 

Oxygen-donor ligands that form alkaline solutions can lead to disproportionation products when added to a Hg(I) salt solution. There must be sufficient present to prevent this. 

Complexes with oxygen-donor ligands can be isolated as solids. The hydrated salts, Hg2(N03)2 2 H20 and Hg2(C104)2 -4 H20 both contain the aquo complex ion I ... 

Koppikar DK, Sivapullaiah PV, Ramakrishnan L, Soundararajan S (1978) Complexes of the Lanthanides with Neutral Oxygen Donor Ligands. 34 135-213 Keren B, see Valach F (1984) 55 101-151... 

The bis-phosphonium salt 56 in presence of Pd(OAc)2 leads to the formation of the neutral bis-ylide 57 which reacts with TICIO4 to give the dinuclear cationic complex 58 (Scheme 22) [89,90]. The bis-ylide part, which has potentially two carbons and one oxygen donor atoms, acts as a C,C-chelating ligand through its two soft ylidic carbons. 

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