41836-21-9Relevant articles and documents
Lanthanide(III) Di- and tetra-nuclear complexes supported by a chelating tripodal tris(amidate) ligand
Brown, Jessie L.,Jones, Matthew B.,Gaunt, Andrew J.,Scott, Brian L.,Macbeth, Cora E.,Gordon, John C.
, p. 4064 - 4075 (2015)
Syntheses, structural, and spectroscopic characterization of multinuclear tris(amidate) lanthanide complexes is described. Addition of K3[N(o-PhNC(O)tBu)3] to LnX3 (LnX3 = LaBr3, CeI3
A structural investigation of heteroleptic lanthanide substituted cyclopentadienyl complexes
Ortu, Fabrizio,Fowler, Jonathan M.,Burton, Matthew,Formanuik, Alasdair,Mills, David P.
, p. 7633 - 7639 (2015)
The substituted cyclopentadienyl group 1 transfer agents KCp′′, KCp′′′ and KCptt (Cp′′ = {C5H3(SiMe3)2-1,3}-; Cp′′′ = {C5H2(SiMe3)3-1,2,4}-; Cptt = {C5H3(tBu)2-1,3}-) were prepared by modification of established procedures and the structure of [K(Cp′′)(THF)]∞·THF (1) was obtained. KCp′′ and KCptt were reacted variously with [Ln(I)3(THF)4] (Ln = La, Ce) in 2-1 stoichiometries to afford monomeric [La(Cp′′)2(I)(THF)] (2a·THF) and the dimeric complexes [La(Cp′′)2(μ-I)]2 (2a), [Ce(Cp′′)2(μ-I)]2 (2b) and [Ce(Cptt)2(μ-I)]2 (3). KCp′′′ was reacted with [Ce(I)3(THF)4] to afford the mono-ring complex [Ce(Cp′′′)(I)2(THF)2] (4), regardless of the stoichiometric ratio of the reagents. Complex 4 was reacted with [KN(SiMe3)2] to yield [Ce(Cp′′′)2(I)(THF)] (5), [Ce(Cp′′′){N(SiMe3)2}2] (6) and [Ce{N(SiMe3)2}3] by ligand scrambling. Complexes 1-6 have all been structurally authenticated and are variously characterised by other physical methods.
The synthesis, structures and polymorphism of the dimeric trivalent rare-earth 3,5-dimethylpyrazolate complexes [Ln(Me2pz) 3(thf)]2
Deacon, Glen B.,Harika, Rita,Junk, Peter C.,Skelton, Brian W.,Werner, Daniel,White, Allan H.
, p. 2412 - 2419 (2014)
A variety of rare-earth 3,5-dimethylpyrazolate (Me2pz) complexes have been synthesised by (i) the direct reaction of Hg-activated metal with Me2pzH as a pro-ligand at elevated temperatures, (ii) by redox transmetalation/protolysis with the lanthanoid element, Hg(C6F 5)2, and Me2pzH, and (iii) by protolysis of tris[bis(trimethylsilyl)amido]cerium(III) with Me2pzH. Each product, upon crystallisation from tetrahydrofuran (thf), formed a dimeric complex, [Ln(Me2pz)3(thf)]2 (Ln = La, Ce, Pr, Nd, Ho, Yb, or Lu). Despite the common formulation, two completely different structures were observed in two distinct crystallographic domains of existence , together presumptively spanning the gamut of Ln and Y. For the larger rare-earth ions (La-Pr), there are two terminal η2-Me 2pz ligands and one thf donor on each Ln atom, with the metal atoms being linked by a pair of bridging pyrazolate ligands of an uncommon type (η2:η5), resulting in formal ten-coordination. A Me2pzH complex [Ce(Me2pz)3(Me2pzH)], although not isomorphous, has a similar structure. For the smaller rare-earth elements (Nd-Lu), the bridging is entirely different, with two μ-κ1(N):κ1(N) pyrazolate and two unusual bridging thf ligands. Each Ln atom also has two chelating Me2pz ligands, resulting in formal eight-coordination. Crystallisation of [Nd(Me 2pz)3(thf)]2 from pyridine yields monomeric, nine-coordinate [Nd(Me2pz)3(pyridine)3] with only chelating Me2pz ligands. Contrasting structures and bridging Me2pz groups for Ln = La-Pr and Ln = Nd-Lu are described. Copyright
Bradley, D. C.,Ghotra, J. S.,Hart, F. A,
, (1972)
Synthesis, characterization, and utility of trifluoroacetic acid lanthanide precursors for production of varied phase fluorinated lanthanide nanomaterials
Boyle, Timothy J.,Yonemoto, Daniel T.,Sears, Jeremiah M.,Treadwell, LaRico J.,Bell, Nelson S.,Cramer, Roger E.,Neville, Michael L.,Stillman, Gregory A.K.,Bingham, Samuel P.
, p. 59 - 73 (2017/05/15)
The synthesis of a series of lanthanide trifluoroacetic acid (H-TFA) derivatives which contain only the TFA and its conjugate acid has been developed. From the reaction of Ln(N(SiMe3)2)3 with an excess amount of H-TFA, the products were identified as: [Ln(μ-TFA)3(H-TFA)2]n (Ln?=?Y, Ce, Sm, Eu, Gd, Tb, Dy), [Ln(μ-TFA)3(μ-H-TFA)]n·solv (Ln·solv?=?Pr·2 H-TFA, H3O+, Ho·2py, Er·py, Yb·py, H-TFA), 3[H][(TFA)La(μ-TFA)3La(TFA)(μ-TFA)2(μc-TFA)2]n ?(H2O) ?(H2O, H-TFA) (La·?(H2O) ?(H2O, H-TFA)), [(k2-TFA)Nd(μ-TFA)3]n·H-py+ (Nd·H-py+), [(py)2Tm(μ-TFA)3]n (Tm), or [Lu(μ-TFA)4Lu(μ-TFA)3·H3O+]n (Lu·H3O+). The majority of samples formed long chain polymers with 3 or 4 μ-TFA ligands. Tm was isolated with py coordinated to the metal, whereas Ho, Er, and Yb were isolated with py located within the lattice. Select samples from this set of compounds were used to generate nanomaterials under solvothermal (SOLVO) conditions using pyridine (py) or octylamine at 185?°C for 24?h. The SOLVO products were isolated as: (i) from py: La – fluocerite (LaF3, PDF 98-000-0214, R?=?9.64%, 35(0) nm), Tb – terbium fluoride (TbF3, PDF 00-037-1487, R?=?4.76%, 21(2) nm), Lu lutetium oxy fluoride (LuOF, PDF 00-052-0779, R?=?8.24%, 8(2) nm); (ii) from octylamine: La – fluocerite/lanthanum oxide carbonate (LaF3, PDF 98-000-0214, R?=?7.47%, 5(0) nm; La2O2(CO3), PDF 01-070-5539, R?=?12.32%, 12(0) nm), Tb – terbium oxy fluoride (TbOF, PDF 00-008-0230, R?=?7.01%, 5(0) nm); Lu – lutetium oxide (Lu2O3, PDF 00-012-0728, R?=?6.52%, 6(1) nm).
