Sila-polyethers as innocent crystallization reagents for heavy alkali metal compounds

CrystEngComm ◽  
2018 ◽  
Vol 20 (36) ◽  
pp. 5370-5376 ◽  
Author(s):  
Fabian Dankert ◽  
Johanna Heine ◽  
Julia Rienmüller ◽  
Carsten von Hänisch
Keyword(s):  
Alkali Metal ◽  
Single Crystals ◽  
Metal Compounds ◽  
Cesium Salts ◽  
Alkali Metal Compounds

Sila-polyethers are used as innocent crystallization reagents for the formation of single crystals of different elusive rubidium and cesium salts.

Structural characterization and Raman spectrum of Cs[OCN]

2020 ◽  
Vol 75 (1-2) ◽  
pp. 129-133
Author(s):  
Olaf Reckeweg ◽  
Armin Schulz ◽  
Francis J. DiSalvo
Keyword(s):  
Crystal Structure ◽  
Raman Spectrum ◽  
Alkali Metal ◽  
Single Crystals ◽  
Structural Characterization ◽  
Title Compound ◽  
Fermi Resonance ◽  
Metal Compounds ◽  
Space Group ◽  
Alkali Metal Compounds

AbstractThe compound Cs[OCN] has been synthesized and its crystal structure and Raman spectrum were determined on selected single crystals. As postulated in earlier work, the title compound crystallizes isopointal to KN3 exhibiting the space group I4/mcm (no. 140, Z = 4) with the lattice parameters a = 653.79(2) and c = 799.42(5) pm. The Raman spectrum verified the nature of the triatomic moiety and shows the frequencies typical for an [OCN]− anion with Fermi resonance between the 2δ and the νsym vibrations. The undisturbed frequencies and the resulting force constants have been calculated and compared to those of other alkali metal compounds containing comparable linear triatomic anions.

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