13813-44-0Relevant academic research and scientific papers
The noncoordinating anion Tf2N- coordinates to Yb2+: A structurally characterized Tf2N complex from the ionic liquid [mppyr][Tf2N]
Mudring, Anja-Verena,Babai, Arash,Arenz, Sven,Giernoth, Ralf
, p. 5485 - 5488 (2005)
(Chemical Equation Presented) Not as innocent as it looks: The first anionic Tf2N complex, [Yb(Tf2N)4]2-, has been prepared in the ionic liquid [mppyr][Tf2N] (see crystal structure; blue: N, yellow: S, gray: C, green: F, orange: Yb, red: O; mppyr = 1-methyl-1-propyl-pyrrolidinium, Tf=trifloromethanesulfonyl). The coordination of the presumed noncoordinating ( innocent ) Tf2N 2- ion could have a decisive influence on reactions in ionic liquids.
Heterometallic lanthanide Group 12 metal iodides
Huebner, Louise,Kornienko, Anna,Emge, Thomas J.,Brennan, John G.
, p. 5659 - 5664 (2004)
Neodymium tri-iodide reacts with Group 12 metal (M; M = Zn, Cd, Hg) iodides to form heterometallic compounds. These Lewis acidic M cleave Nd-I bonds to give either ionic {[(THF)5NdI2][MI3THF]; M = Zn, Cd} or charge-neutral {(THF)5NdI(μ2I)HgI3} compounds. Differences in structure are interpreted primarily in terms of M-L bond strengths, rather than Nd-L bond strengths. Experiments with Yb indicate that if there is any excess iodide present in these syntheses then the most readily isolated product is a triiodide salt, i.e., [(THF)5YbI 2][I3]. In conventional solvents the presence of Lewis acid is not required for iodide displacement-from pyridine, YbI 3 crystallizes as [(Py)5YbI2][I]. These compounds are potentially useful as heterometallic sources of lanthanide-doped iodide matrixes, they illustrate the ease with which iodides are displaced from lanthanide coordination spheres, and they underscore the complexity associated with using lanthanide iodides as Lewis acid catalysts.
Structural characterization of methanol substituted lanthanum halides
Boyle, Timothy J.,Ottley, Leigh Anna M.,Alam, Todd M.,Rodriguez, Mark A.,Yang, Pin,Mcintyre, Sarah K.
, p. 1784 - 1795 (2010/07/03)
The first study into the alcohol solvation of lanthanum halide [LaX3] derivatives as a means to lower the processing temperature for the production of the LaBr3 scintillators was undertaken using methanol (MeOH). Initially the de-hydration of {[La(μ-Br)(H2O)7](Br)2}2 (1) was investigated through the simple room temperature dissolution of 1 in MeOH. The mixed solvate monomeric [La(H2O)7(MeOH)2](Br)3 (2) compound was isolated where the La metal center retains its original 9-coordination through the binding of two additional MeOH solvents but necessitates the transfer of the innersphere Br to the outersphere. In an attempt to in situ dry the reaction mixture of 1 in MeOH over CaH2, crystals of [Ca(MeOH)6](Br)2 (3) were isolated. Compound 1 dissolved in MeOH at reflux temperatures led to the isolation of an unusual arrangement identified as the salt derivative {[LaBr2.75·5.25(MeOH)]+0.25 [LaBr3.25·4.75(MeOH)]-0.25} (4). The fully substituted species was ultimately isolated through the dissolution of dried LaBr3 in MeOH forming the 8-coordinated [LaBr3(MeOH)5] (5) complex. It was determined that the concentration of the crystallization solution directed the structure isolated (4 concentrated; 5 dilute) The other LaX3 derivatives were isolated as [(MeOH)4(Cl)2La(μ-Cl)]2 (6) and [La(MeOH)9](I)3·MeOH (7). Beryllium Dome XRD analysis indicated that the bulk material for 5 appear to have multiple solvated species, 6 is consistent with the single crystal, and 7 was too broad to elucidate structural aspects. Multinuclear NMR (139La) indicated that these compounds do not retain their structure in MeOD. TGA/DTA data revealed that the de-solvation temperatures of the MeOH derivatives 4-6 were slightly higher in comparison to their hydrated counterparts.
Accessing decaphenylmetallocenes of ytterbium, calcium, and barium by desolvation of solvent-separated ion pairs: Overcoming adverse solubility properties
Deacon, Glen B.,Forsyth, Craig M.,Jaroschik, Florian,Junk, Peter C.,Kay, Danielle L.,Maschmeyer, Thomas,Masters, Anthony F.,Wang, Jun,Field, Leslie D.
, p. 4772 - 4778 (2009/02/08)
The redox-transmetalation ligand-exchange reaction of ytterbium or calcium metal with 2 equiv of pentaphenylcyclopentadiene (C5Ph5H) and 1 equiv of HgPh2 in thf afforded the solvent-separated ion pairs (SSIPs) [M(thf)
Studies on organolanthanoid complexes LI. Syntheses of bis- and tris(2-methoxyethylcyclopentadienyl) lanthanoid complexes and crystal structures of bis(2-methoxyethylcyclopentadienyl)ytterbium iodide and tris(2-methoxyethylcyclopentadienyl)samarium
Deng, Daoli,Qian, Changtao,Song, Fuquan,Wang, Zhaoyu,Wu, Guang,et al.
, p. 83 - 88 (2007/10/02)
Reactions of lanthanoid triiodides (Ln = Sm, Yb) with two or three equivalents of 2-methoxyethylcyclopentadienyl potassium salt in tetrahydrofuran afford bis(2-methoxyethylcyclopentadienyl) lanthanoid iodide complex Cp'2YbI (I) (Cp' = MeOCH2CH2C5H4), tris(2-methoxyethylcyclopentadienyl) lanthanoid complexes Cp'3Sm (II) and Cp'3Yb (III), respectively.The compound Cp'2YbI (I) crystallizes from THF/hexane in orthorhombic space group P212121 with cell dimensions a = 10.892(2), b = 12.278(3), c = 12.805(5) Angstroem, V = 1712.4 Angstroem3, Dcalcd = 2.118 g cm-3for Z = 4.The central metal Yb is coordinated by two Cp' ring centroids, one iodine atom and two oxygen atoms of Cp' forming a distorted trigonal bipyramid.The crystal of Cp'3Sm (II) belongs to the monoclinic crystal system, space group P21/n with a = 8.415(7), b = 20.439(3), c = 12.926(2) Angstroem, β = 90.34(3) deg, V = 2223.2 Angstroem3, Dcalcd = 1.562 g cm-3 and Z = 4.The three Cp' ring centroids and two oxygen atoms of Cp' describe a trigonal bipyramid around the central ion of samarium.Complexes I, II and III are all unsolvated monomeric molecules with higher coordination number.
