Crystal Structures and Thermal Behavior of Alkaline Earth Tricyanomethanides

• Published in: Zeitschrift für Naturforschung. B, A journal of chemical sciences Vol. 63; no. 3; pp. 285 - 288
• Main Authors: Bessler, Karl E., Gatto, Claudia C., Romualdo, Lincoln L., Ellena, Javier A., A. Sales, Maria J. de
• Format: Journal Article
• Language: English
• Published: Verlag der Zeitschrift für Naturforschung 01-03-2008
• Subjects: Alkaline Earth Tricyanomethanides; Pseudohalides; Thermoanalysis; X-Ray Crystal Structures
• ISSN: 0932-0776; 1865-7117
• DOI: 10.1515/znb-2008-0310

The alkaline earth tricyanomethanides Mg(tcm)
· 2H
O, Ca(tcm)
, Sr(tcm)
・H
O and Ba(tcm)
· 2H
O were prepared from aqueous solutions of the respective chlorides and silver tricyanomethanide. Their IR spectra and thermal behavior are described. The crystal structures of Ca(tcm)
and Ba(tcm)
· 2H
O were determined by single crystal X-ray diffraction. The structure of Ca(tcm)
is of the type found for several transition metal tricyanomethanides [1], containing two independent interpenetrating networks. Ba(tcm)
· 2H
O has a unique crystal structure corresponding to a three-dimensional coordination polymer with nine fold coordinated Ba atoms connected by water molecules and tricyanomethanide anions.