Ligands mixed donor

West and colleagues206 have reported the initial examples involving a N -> O/S -> O mixed donor ligand such as 2-(ethylsulphinyl)pyridine A-oxide for transition metal ion and lanthanide metal ion as shown in Scheme 22. Crystal field parameters based on... 

A detailed comparative study of the allylic substitution in allylacetates by amines has been carried ont for the two related mixed donor ligand systems 113 and 114 shown in Fig. 2.19. The P-C system shows dramatically lower activity than N-P, which has been atlribnted to the decreased electrophiUcity of the coordinated aUyl gronp, originating from the strongly o-donating NHC and P donors, compared to N and P donors. 

Polyimines of low-valent Co are now well represented, particularly with macrocyclic or mixed-donor ligands. The monovalent Co complex (5) of the 14-membered macrocyclic hexamethyl diimine (hmd), may be generated electrochemically from its divalent precursor. Furthermore,... 

With N,0 mixed donor ligands several complexes have been reported with ligands such as 4,5-dichloro-2-cyano-3,6-dione-l,4-cyclohexen-l-ol,1445 isonicotinic acid,1446 p-aminobenzoic acid,1447 alanine, histidine or histamine derivatives,1448-1450 [N(0)C(CN)2]-,1451 pyridine-carboxylate derivatives, 1452 1454 [N(pph20)2] (263),1455 bis(sulfonyl)amide derivatives,1456,1457 tris(pyridyl)-... 

Triangular trigold(I) complexes of the type [Au3L3l, where L is a mixed donor ligand (Figure 24), have been known for over 20 years,2355,2362,3122-3125 but it is only recently that some remarkable chemical reactivities and physical properties of these molecules have been recognized. 

Pentadentate and Higher Denticity Mixed Donor Ligands 1227... 

Liver Alcohol Dehydrogenase Models with Mixed Donor Ligands 1228... 

Polydentate nitrogen donor tripod ligands are discussed in this section. Mixed donor ligands containing nitrogen donors are discussed in Section 6.8.11. 

N/S mixed-donor ligands are of particular interest due to the biological relevance of the combination of these donors around zinc. 

Organozinc Alkoxides Bearing Chelating Mixed Donor Ligands 375... 

---