Kubische Cyanomercurate NR4MHg(CN)4 (R = Et, Pr; M = Li, Na, K, Cu) mit Alumosilikatstruktur/On Cubic Cyanomercurates NR4MHg(CN)4 (R = Et, Pr; M = Li, Na, K, Cu) with Alumosilicate Type Structure
Year: 1986
Type: article
Abstract: Quaternary Cyanomercurates NR4 +[MHg(CN)4]- with R = Et, Pr; M = Li, Na, K, Cu, obtained by reactions of NR4CN . MCN and Hg(CN)2 in polar solvents, are dimorphous. The low temperature modifications are tetragonal with a space group I4̄, the high temperature forms are cubic with the space group F4̄3m . Reversible phase transitions were studied by DSC, Raman spectroscopy and X-ray diffraction. They are of first order and of displacive character. The X-ray structure determinations of the cubic forms of NEt4MHg(CN)4 with M = Na, Li showed tetrahedral M (NC)4- and Hg(CN)4- groups connected by linear M -NC -Hg bridges to give three-dimensional frameworks o f a cristobalite type structure and with cavaties, in which the NEt4 + cations are located.
Source: Zeitschrift für Naturforschung B
Institution: University of Freiburg
Language: English
Subfield: Inorganic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $2,712
OpenAlex ID: W2034467415