996 resultados para Nd YV O4
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A series of neutral eta6-C6Me6 complexes of lanthanide elements Ln(176-C6Me6)(AlCl4)3 . MeC6H5(Ln = Nd, Sm, Gd, Yb) has been prepared directly in good yields from the reaction of LnCl3, AlCl3 and C6Me6 in toluene. The complexes have been characte
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In the presence of 1,10-phenanthroline (phen), lanthanide chlorides LnCl3 reacted with cyclopentadienylsodium to give the novel complexes [Na.3phen]+[Ln(C5H5)3Cl]-.phen (Ln = La, Pr or Nd). In the praseodymium case, crystal structure analysis showed that
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The title complex, tris[2(eta5)-tert-butylcyclopentadi-enyl]-mu-chloro-1:2kappa2Cl-tris(tetrahydrofuran-1kappaO)lithiumneodymium, [Nd(C9H13)3(mu-Cl)Li(C4H8O)3], consists of the neutral moiety ((t)BuCp)3Nd linked to the cation [Li(thf)3]+ by a mu-Cl bridge
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~6-.~6-.(~6-C_6H_6)Nd-(AlCl_4)_3-AlR_3,AlR_3. 1.:.,
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CH_3C_5H_4LnCl_22LiClnTHF2molLiNPh_2THF,DME,[Li(DME)_3][(~5-CH_3C_5H_4)Ln(NPh_2)_3](Ln=La,Pr,Nd)IRNMR,,P2_1/a,=1.7461(6)nm,b=1.6576(5)nm,c=1.8335(6)nm,=96.04,V=5.277um~3,Z=4,D_c=1.26g/cm_3,R=0.057,R_w=0.048,La-NLa-C()0.2459(8) 0.2843(11)nm
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(P_(350))Nd(),11.8kJ/mol,,,
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.Fe~(3+),XRD,XPSIRLaGa_(1-x)Fe_xO_3,.,LnGa_(1-x)Fe_xO_3(Ln=La,Pr,Nd),
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The reaction of LnCl3.2LiCl with 1 equiv of MeCpNa in THF gives the complexes [(THF)2Li(mu-Cl)2]2[MeCpLn(THF)] (Ln = Nd (1), La (2)) in good yield. These precursors react further with 2 equiv of LiNPh2 to produce the new complexes [Li(DME)3][MeCpLn(NPh2)3] (Ln = La (3), Pr (4), Nd (5)). They have been characterized by elemental analyses and IR and NMR spectra, as well as by structural analyses of 1 and 3. The chloride 1 crystallizes in the monoclinic space group P2(1)/n (No. 14) with a = 12.130 (5) angstrom, b = 17.343 (5) angstrom, c = 17.016 (5) angstrom, beta = 108.54 (3)-degrees, V = 3393.87 angstrom3, Z = 4, and D(c) = 1.45 g/cm3. Least-squares refinement led to a final R value of 0.051 (I greater-than-or-equal-to 3-sigma(I(o))) for 2004 independent reflections. Complex 3 crystallizes in the monoclinic space group P2(1)/c (No. 14) with a = 18.335 (6) angstrom, b = 16.576 (5) angstrom, c = 17.461 (6) angstrom, beta = 96.04 (3)-degrees, V = 5277.17 angstrom3, D(c) = 1.26 g/cm3, Z = 4, and R = 0.057 (I greater-than-or-equal-to 2.5-sigma(I(o))) for 3378 reflections. The structure of 3 consists of discrete ion pairs [Li(DME)3]+ and [MeCpLa(NPh2)3]- with average La-N and La-C(ring) distances of 2.459 (8) and 2.84 (1) angstrom, respectively.
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1969Eu(C_8H_8)Yb(C_8H_8),K[Ln(C_8H_8)_2],[Ln(C_8H_8)Cl2THF]_2[Ln(C_8H_8)2THF],
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(L).[Nd(L)-(CH_3CN)(CF_3SO_3)_3],,PI,=0.8738(2),b=1.2870(3),c=1.2900(3)nm;=85.63(2),=87.25(2),=78.30(2);R=0.0370,R_w00385.8,.
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,Ziegler-Natta,,Nd-Al,,,