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Lanthanum arene complexes

The success of direct P4 activation by scandium arene complexes was mirrored when other rare earths, such as yttrium, lanthanum, and lutetium, were employed. The yttrium, lanthanum, and lutetium naphthalene complexes were prepared by a similar protocol to that of Sc2-naph (Scheme 5). Different from... [Pg.298]

The ligand p-t-butylcalix[4]arene fitted with phosphinoyl arms is synthesized by refluxing the tetrasodium derivative of p-t-butylcalix[4]arene and chloro(dimethylphosphinoyl) methane in toluene or xylene [88]. The resulting ligand L is reacted with lanthanum perchlorate in acetonitrile to obtain 1 1 and 1 2 complexes, LaL and LaL2- The majority of the supramolecular complexes of rare earths involves the use of organic solvents like toluene, hexane or acetonitrile for the synthesis of both the ligands and lanthanide complexes. [Pg.270]

The parent oxacalix[3] arenas show little ability to bind alkali metals,however, a range of quaternary ammonium cations are attracted to the symmetric cavity. Deprotonation of the phenol moieties allows them to bind to transition metals (scandium, titanium, vanadium, rhodium, molybdenum, gold, etc.), lanthanides (lutetium. yttrium, and lanthanum), and actinides (uranium as uranyl). Oxacalix[3]arenes derivatized on the lower rim can complex gallium, mercury, and alkali metals, including sodium, in a manner reminiscent of natural transmembrane cation filters. One major use was to purify crude samples of fullerenes. The pseudo-Cs symmetry of the macrocyclic cavity is complementary to threefold symmetry elements of Cgo. which binds preferentially in... [Pg.651]

Complexes consisting of functionalized calix[4]arenes with zinc (II) (Scheme 4.23), barium (II), copper (II), and lanthanum (III) were proved as most interesting and efficient catalytic systans [83-85]. In these studies, bi- and trinu-clear metal complexes consisting of Zn (II), Cu (II), and calixarene containing... [Pg.99]


See other pages where Lanthanum arene complexes is mentioned: [Pg.452]    [Pg.86]    [Pg.273]    [Pg.197]    [Pg.154]    [Pg.363]    [Pg.141]    [Pg.161]    [Pg.49]    [Pg.30]    [Pg.496]    [Pg.59]   
See also in sourсe #XX -- [ Pg.340 ]




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