Lanthanide mono

Although direct reaction of lanthanide mono-porphyrins with free phthalo-cyanine or its lithium derivatives is generally more efficient than the template synthesis, and gives rise to mixed-ligand complexes, the template strategy can also be applied for synthesis of phthalocyanine-porphyrin complexes, as in the case of unsymmetric bisphthalocyanine complexes (Scheme 8.2, B(b)) [106, 136, 145, 146]. Thus, metallation of free porphyrins with lanthanide salts in TCB or n-octanol leads to single-decker complexes, which then react with phthalonitriles under the action of DBU in alcoholic media to give the desired compounds. 

Lanthanide monohydride complexes, such as bi(cyclopentadienyl) lanthanide hydrides, can be conveniently prepared by the reactions of lanthanide mono-alkyl or -aryl complexes with organosilanes under mild reaction conditions (Figure 8.27) [82]. 

Bonnet, R Hillier, A. C. Collins, A. Dubberly, S. R. Mountford, R Lanthanide mono(borohydride) complexes of diamide-diamine donor ligands Novel single site catalysts for the polymerisation of methyl methacrylate. Dalton Trans. 2005,421 23. 

The primary analysis of the data from Tables 73 and 74 allows us to suggest a scheme for calculating the enthalpies of atomization of lanthanide mono- and difluorides. 

The first group comprises reactions (7) and (27), which do not involve lanthanide mono and/or difluorides. Henceforth, the calculations for these reactions only allow one to judge the quality of measiu-ements of the equilibrimn constants (Zmbov and Margrave, 1966a,c). indeed, the use of AatH°(NdF3, 0) = 1792. 2 kj/mol and the ArH°(0, in law) and (0, n law) values for reaction (7) from Table 73 gives AatH°(BaF, 0) = 570.5 and 532.6 kj/mol, respectively. Comparison of these values with the recommended one (580.0 kJ/mol) (see IVTANTERMO, 2004) allows us to regard the third law calculations as satisfactory. 

Mono- and polymetallic lanthanide-containing functional assemblies with heterocyclic ligands 99CSR347. 

Different main-group-, transition- and lanthanide-metal complexes can catalyze the cycloaddition reaction of activated aldehydes with activated and non-activated dienes. The chiral metal complexes which can catalyze these reactions include complexes which enable substrates to coordinate in a mono- or bidentate fashion. 

In a systematic study, it was demonstrated that, using a specially designed bulky benzamidinate ligand, it is possible to isolate mono(amidinato) dialkyl complexes over the full size range of the Group 3 and lanthanide metals, i.e., from scandium to lanthanum. The synthetic methods leading to the neutral and cationic bis(alkyls) are summarized in Scheme 56. Figure 18 displays the molecular structures of the cations obtained with Sc, Gd, and La. ... 

Ferenc, W. et al., Monatsh. Chem., 1987, 118, 1087-1100 Preparation of the 2-nitrobenzoate salts of yttrium and the lanthanide metals (except praseodymium) as mono- or di-hydrates was studied. All melted and decomposed explosively above 250°C. 

As indicated later (see Section VI,8), on addition of the chloride of praseodymium, europium, or other lanthanides to mono- or poly-sac-charide phosphates in D20, the signals of carbon atoms substituted with phosphate groups are recognizable, as they are displaced, relative to the rest of the 13C-n.m.r. spectrum.155 However, this diagnostic method is not applicable to sulfated polysaccharides, as signal displacements were not observed on addition of praseodymium or europium chloride to a solution of a,/3-D-galactose 6-sulfate or its sodium salt.156... 

The L M in the complexes of lanthanide nitrates with TMSO decreases along the lanthanide series (264, 265). All these complexes contain both bidentate and mono-dentate nitrate groups (264), the monodentate nitrates giving way to bidentate nitrates as the cationic radius decreases. 

An analysis of the shift reagent properties of lanthanide 3-diketonato-complexes, (1 R = R = Bu Ln = Eu, R = CF3, R = Bu ), with respect to mono- and di-functional substrates, has been given. The ability of these complexes to form 1 1 and 1 2 adducts with the substrates seemed to be determined by the nature of the substrate and the relative concentrations of the... 

Radonovich and Click [156) in 1971 reported the crystal structure of Pr(terp)Cl3 8H2O complex, which they prepared by the original method of Sinha [157), for the preparation of mono-terpyridyl-lanthanide(III) chlorides, [M(terp)Cl3 wHaO], where terp =2,2, 2"-terpyridyl and has the following structure. When... 

Schiff base approaches have beenusedto synthesize mono-, di-, andtri-nuclear lanthanide complexes (73-78). Complexes of the macrobicyclic... 

Mono- and bimetallic lanthanide complexes of the tren-based macrobicyclic Schiff base ligand [L58]3- have been synthesized and structurally characterized (Fig. 15), and their photophysical properties studied (90,91). The bimetallic cryptates only form with the lanthanides from gadolinium to lutetium due to the lanthanide contraction. The triplet energy of the ligand (ca. 16,500 cm-1) is too low to populate the terbium excited state. The aqueous lifetime of the emission from the europium complex is less than 0.5 ms, due in part to the coordination of a solvent molecule in solution. A recent development is the study of d-f heterobimetallic complexes of this ligand (92) the Zn-Ln complexes show improved photophysical properties over the homobinuclear and mononuclear complexes, although only data in acetonitrile have been reported to date. 

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