996 resultados para Nd YV O4
Resumo:
(~5-C_9H_7)_3LnOC_4H_8(Ln=NdGdEr),,(~5-C_9H_7)_3NdOC_4H_8(1)(~5-C_9H_7)_3GdOC_4H_8(2)(1)(2),P6_3,Z=2(1)a=b=1.1843(3)nm,c=1.0304(4)nm,V=1.25165(87)nm~3,D_c=1.49gcm~(-3),R=0.049;(2)a=b=1.1805(2)nm,c=1.0236(2)nm,V=1.23536(56)nm~3,D_c=1.54 gcm~(-3),R=0.023Nd-C=0.2812nm,Gd-C=0.2795nm;Nd-O=0.2557(21)nm,GdO=0.2459(13)nm
Resumo:
XNd(C_6H_5CH_2COO)_3H_2O,Pna2_1,a=0.7983(1)nm,b=1.3975(1)nm,c=2.0282(2)nm,Z=4TGDTGDTADSC
Resumo:
Ga-Nd,KCl-NdCl_3Ga-Nd KCl-NdCl_3KClNdCl_3Nd_2O_3(>99.99)NH_4Cl,350,NdCl_3(99.99wt),
Resumo:
NdCl_31:2THF,,,,P2/c,a=1.7858(7)nm,b=1.3243(4)nm,c=1.8085(6)nm,=106.52(4),V=4.10nm~3,D_c=1.268 g/cm~3,Z=4,F(000)=1660,R=0.0774,R_w=0.0733,,THF,THF
Resumo:
The complexes named in the title (eta-5-C9H7)3Ln.OC4H8 (Ln = Nd, Gd, Er) were synthesized by the reaction of anhydrous lanthanide trichlorides with indenyl potassium and cyclooctadienyl potassium (1:2:1 molar ratio) in THF. The complexes were characterized by elemental analysis, infrared and H-1-NMR spectroscopy, and mass spectrometry. In addition, the crystal structures of (eta-5-C9H7)3Nd.OC4H8 (1) and (eta-5-C9H7)3Gd.OC4H8 (2) were determined by an X-ray diffraction study. Complexes 1 and 2 belong to hexagonal space group P6(3) with unit cell parameters a = b = 11.843(3), c = 10.304(4) angstrom, V = 1251.7(9) angstrom-3, D(c) = 1.49 g.cm-3, Z = 2 for 1, and a = b = 11.805(2), c = 10.236(2) angstrom, V = 1235.4(6) angstrom-3 D(c) = 1.54 g.cm-3, Z = 2 for 2. The structures were solved by Patterson and Fourier techniques and refined by least-squares to final discrepancy indices of R = 0.049, R(w) = 0.053 using 925 independent reflections with I greater-than-or-equal-to 3-sigma(I) for 1, and R = 0.023, R(w) = 0.025 using 1327 independent reflections with I greater-than-or-equal-to 3-sigma(I) for 2. Coordination numbers for Nd3+ and Gd3+ are 10; the average bond lengths Nd-O and Gd-O are 2.557(21) and 2.459(13) angstrom, respectively. The structural studies showed the complexes to have 3-fold symmetry, but the THF molecule has no such symmetry; consequently the arrangement of carbon atoms in the THF molecule are disordered.
Resumo:
,NdCl_33TBPNdel_33P_(350)Al(i-Bu)_3,IR~(13)C-NMR,
Resumo:
,Al-Nd,Al-Nd3100
Resumo:
THF,(C_5H_5)_2NdClZLiCl,P 2/c,=9.235(2)A,b=11.695(2)A,c=20.810(3)A,=92.88(1),Z=2,Li3DME~+(~5-C_5H_5)_3Nd(-H)Nd(~5-C_5H_5)_3~-,Li3DME6O,,LiO2.116A;,2Nd,H,NdH=2.19A,Nd3C_5H_5~-,NdC2.812A
Resumo:
Ziegler-NattaNdCl_33P_(350)~(**)-Al(i-Bu)_3Nd-AlNdCl_33P_(350)-HAl(i-Bu)_2Al(C_2H_5)_3Nd-Al,,AlR_3 HAl(i-Bu)_2Al(C_2H_5)_5,,[4]
Resumo:
1970Coutts-(C_5H_5)_2ScC_3H_51987Li_2Ce(C_3H_5)_53D(D)1991-(C_3H_5)_2CeCl_5Mg~2(tmed)_2
Resumo:
1--3--4--5(PMBP,HA),50,PMBP,Nd(?),(P350,B)PMBP,
Resumo:
.Ballard).Watson,CH.,
Resumo:
V-A(CV)Nd~(3+)Ga,Nd~(3+)Ga,Nd~(3+)+e?Nd~(2+);,,Nd~(3+)+e?Nd~(2+)+mClNdCl_m~(2-m),NdGa,Nd~(2+)+2eNd(Ga)7.010~(-3)cm/s
Resumo:
The sequence distribution of the monomeric units in the styrene-acrylic acid copolymer has been obtained by calculation. The probability of long sequences of styrene increases with an increase in the content of the monomer in the copolymer. The highest distribution of short sequences of styrene takes place for the copolymer containing equimolecular amounts of styrene and acrylic acid. The copolymer which has this latter structure is inadequate for the synthesis of highly active supported complexes. When the distributions of long and short sequences of styrene are approximately equal, the activity of the Nd and Fe prepared polymer complexes is higher.
Resumo:
LnGaO_3(Ln=LaPrNb),,LaGaO_3PrGaO_3,LaGaO_3540nm,
