Nine-coordinate lanthanide complexes

Nine-Coordinated Lanthanide Complexes with P-Diketones... 

Nine-Coordinate Lanthanide Complexes with )3-Diketones... 

Nine-coordinate lanthanide complexes with /3-diketones having the compositions of Ln(/3-diketonate)4(sol) andLn(/3-diketonate)3(L)(sol)3 (L = N,N,N-tridentate ligand, X = 0 L = N,N,-bidentate ligand, x = 1), have recently been stmcturally characterized. The molecular stmcture of Eu(L )3(TPTZ) (TPTZ = 2,4,6-tri(2-pyridyl)-l,3,5-triazine) isis shown in Figure 14. The lanthanide ion in each of... 

Bis(indenyl)lanthanide complexes are also described. According to X-ray crystallographic investigations (C4H7-OCH2C9H6)2LnCl (Ln = Nd, Sm, Dy, Ho, Er, Yb) (Figure 39) are unsolvated nine-coordinate monomeric complexes with a... 

Kottas, G.S., Mehlstaubl, M., Frohlich, R., and De Cola, L. (2007) Highly luminescent, neutral, nine-coordinate lanthanide(III) complexes. European Journal of Inorganic Chemistry, 3465. 

Solution dynamics of complexes of EGTA (3,12-bis(carboxymethyl)-6,9-dioxa-3,12-diazate-tradecanedioate) have been studied a change in coordination number from 10 to eight is believed to occur across the lanthanide series. " Binuclear La and Y complexes of 9,14-dioxo-l,4,7,10,13-pentaaza-l,4,7-cyclopentadecanetriacetic acid have nine-coordinate lanthanides. Lanthanide polyamine carboxylates and complexes of macrocycles with pendant amide groups show promise as catalysts for RNA cleavage such complexes have considerable stability in aqueous... 

Fig. 51. Variation of the lattice parameters and c (A) for the nine coordinated MF3 complexes of the lanthanides with their L-values.

Probably, the first series of lanthanide complexes with neutral oxygen donor ligands is that of AP with the lanthanide nitrates. In 1913, Kolb (79) reported tris-AP complexes with lighter lanthanide nitrates and tetrakis-AP complexes with heavier lanthanide nitrates. Subsequently, complexes of lanthanide nitrates with AP which have a L M of 6 1 and 3 1 have also been prepared (80-82). Bhandary et al. (83) have recently shown through an X-ray crystal and molecular structure study of Nd(AP)3(N03)3 that all the nitrates are bidentate and hence the coordination number for Nd(III) is nine in this complex. Complexes of AP with lanthanide perchlorates (81, 84), iodides (81, 85), and isothiocyanates (66, 86, 87) are known. While the perchlorates and iodides in the respective complexes remain ionic, two of the isothiocyanates are coordinated in the corresponding complexes of AP with lanthanide isothiocyanates. 

Bobba, G. Frias, J. C. Parker, D. Highly emissive, nine-coordinate enantiopure lanthanide complexes incorporating tetraazatriphenylenes as probes for DNA. Chem. Commun. 2002, 890. 

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