[Ag(NH 3) 2](ClO 4) is obtained from a solution of AgClO 4 in conc. ammonia as colourless single crystals (orthorhombic, Pnmn, Z = 4, a = 795.2(1) pm, b = 617.7(1) pm, c = 1298.2(2) pm, R all = 0.0494). The structure consists of linearly coordinated cations, [Ag(NH 3) 2] +, stacked in a staggered conformation and of tetrahedral (ClO 4) - anions. A first order phase transition was observed between 210 and 200 K and the crystal structure of the low-temperature modification (monoclinic, P2/m, Z = 4, a = 789.9(5) pm, b = 604.1(5) pm, c = 1290.4(5) pm, β = 97.436(5)°, at 170 K, R all = 0.0636) has also been solved. Spectroscopic investigations (IR/Raman) have been carried out and the assignment of the spectra is discussed.
|Translated title of the contribution||[AG(NH 3) 2]ClO 4: Crystal structures, phase transition, and vibrational spectra|
|Number of pages||5|
|Journal||ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE|
|Publication status||Published - 17 Aug 2002|
- Phase transition
ASJC Scopus subject areas
- Inorganic Chemistry