Structural Systematics of Rare Earth Complexes. IV. Structural Characterization of Lanthanoid(III) Picrate Hydrates: the Quasi-Undecahydrate of Samarium(III) Picrate

1994 ◽  
Vol 47 (2) ◽  
pp. 359 ◽  
Author(s):  
JM Harrowfield ◽  
BW Skelton ◽  
AH White

The structural characterization of a new quasi- undecahydrate of samarium(III) picrate is described. [ Sm ( pic )2(OH2)6]( pic ).43/4H2O is monoclinic, C 2/c, a 39.96(1), b 7.951(2), c 24.233(9) Ǻ, β 110.92(2)°, Z = 8, temperature c.295 K; R was 0.047 for 5010 'observed' diffractometer reflections. Like the cations of Part I, the present has two picrate and six aqua ligands; although the general stereochemistry is similar, the picrate ligands are both clearly unidentate, unlike previous arrays wherein one behaves in a quasi- bidentate mode utilizing an ortho-nitro oxygen atom.

2015 ◽  
Vol 39 (10) ◽  
pp. 7672-7681 ◽  
Author(s):  
Antonio Otero ◽  
Agustín Lara-Sánchez ◽  
José A. Castro-Osma ◽  
Isabel Márquez-Segovia ◽  
Carlos Alonso-Moreno ◽  
...  

New amide heteroscorpionate rare-earth complexes were developed and used as efficient catalysts for the intramolecular hydroamination of aminoalkenes.


1994 ◽  
Vol 47 (2) ◽  
pp. 391 ◽  
Author(s):  
CJ Kepert ◽  
BW Skeleton ◽  
AH White

The room-temperature single-crystal X-ray structural characterization of the title compound (tpyH2)2[Tb(OH2)8]Cl7.~2⅓H2O is recorded. Crystals are triclinic, Pī , a 17.063(5), b 16.243(3), c 7.878(3) Ǻ, α 84.78(2), β 84.39(3), γ 87.81(2)°, Z = 2 formula units; 3167 'observed' diffractometer reflections were refined by full-matrix least-squares procedures to a residual of 0.057. Notable features of interest of the compound are the 'chelation' of chloride ions by the terpyridinium cations , and the existence of a free [Tb(OH2)8]2+ cation in the presence of an abundance of chloride ions.


2013 ◽  
Vol 139 (2-3) ◽  
pp. 494-499 ◽  
Author(s):  
G.N. Rocha ◽  
L.F.L. Melo ◽  
M.C. Castro ◽  
A.P. Ayala ◽  
A.S. de Menezes ◽  
...  

2016 ◽  
Vol 37 (5) ◽  
pp. 616-623
Author(s):  
李小芳 LI Xiao-fang ◽  
冯小强 FENG Xiao-qiang ◽  
杨 声 YANG Sheng ◽  
朱元成 ZHU Yuan-cheng

2008 ◽  
Vol 8 (2) ◽  
pp. 494-500 ◽  
Author(s):  
Samuel J. Mugavero III ◽  
Mark D. Smith ◽  
Hans-Conrad zur Loye

2004 ◽  
Vol 83 (5) ◽  
pp. 1087-1092 ◽  
Author(s):  
Enrico Traversa ◽  
Patrizia Nunziante ◽  
Luigi Sangaletti ◽  
Brigida Allieri ◽  
Laura E. Depero ◽  
...  

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