ISSN:
1572-8854
Keywords:
8-Coordinate cryptate
;
ytterbium(III)
;
rare-earth elements
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract The first example of an 8-coordinate cryptate of cryptand(2,2,2) [N(CH2CH2OCH2CH2OCH2CH2)3N], Yb3+, and multiple nitrato andN-thiocyanato ligands, H2Yb(NCS)3(NO3)2(2,2,2)·H2O (I), has been synthesized. The crystal and molecular structure ofI have been determined by single-crystal X-ray diffraction. The Yb3+ cation is not located in the cavity of the cryptand(2,2,2), but is connected to it through a water bridge by two hydrogen bonds to form an exclusive cryptate. The two H+ ions are mostly probably bound to the two N atoms of cryptand(2,2,2). The coordinating atoms of the NO 3 − , NCS−, and H2O ligands constitute a trigonododecahedron around the central Yb3+ ion. CryptateI crystallizes in the monoclinic space groupP2l/n withZ=4. The finalR factor for 3659 independent reflections, following correction for Lorentz and polarization effects and havingF 0〉5σ(F 0), is 0.053. Infrared spectroscopic data for1 are consistent with the X-ray crystal structure results.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01671669
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