Role of Donor and Secondary Interactions in the Structures and Thermal Properties of Alkaline-Earth and Rare-Earth Metal Pyrazolates

2006 ◽  
Vol 45 (25) ◽  
pp. 10329-10337 ◽  
Author(s):  
Julia Hitzbleck ◽  
Anna Y. O'Brien ◽  
Glen B. Deacon ◽  
Karin Ruhlandt-Senge
Keyword(s):  
Thermal Properties ◽  
Rare Earth ◽  
Rare Earth Metal ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Secondary Interactions

scholarly journals Molecular cleft or tweezer compounds derived from trioxabicyclo[3.3.1]nonadiene diisocyanate and diacid dichloride

2015 ◽  
Vol 11 ◽  
pp. 1-8 ◽  
Author(s):  
Gert Kollenz ◽  
Ralf Smounig ◽  
Ferdinand Belaj ◽  
David Kvaskoff ◽  
Curt Wentrup
Keyword(s):  
Rare Earth ◽  
Crown Ether ◽  
Dft Calculations ◽  
Metal Ions ◽  
Rare Earth Metal ◽  
Alkaline Earth ◽  
Earth Metal ◽  
X Ray ◽  
X Ray Crystallography ◽  
Derivatives Of

The structures of two derivatives of the bisdioxine diisocyanate 1, the bisurea 4 and the biscarbamate 5, are established by X-ray crystallography and DFT calculations. These compounds possess endo,endo structures, in the case of the bisurea 4 with two nearly parallel pendant chains. The X-ray structures are reproduced very well by DFT calculations. Similar endo,endo conformations are calculated for the bisamide crown ether derivatives 7, where two proximate and nearly parallel crown ether units endow the molecules with a claw-like molecular cleft or tweezer structure as evidenced by an enhanced ability to extract some alkali, alkaline earth and rare earth metal ions.

Crystallographic studies into the role of exposed rare earth metal ion for guest sorption

CrystEngComm ◽  
2011 ◽  
Vol 13 (19) ◽  
pp. 5849 ◽  
Author(s):  
Lin-Hua Xie ◽  
Yu Wang ◽  
Xiao-Min Liu ◽  
Jian-Bin Lin ◽  
Jie-Peng Zhang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Metal Ion ◽  
Earth Metal
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