TITLE:
Synthesis, Characterization and X-Ray Structure of a Ba(II)/Ag(I)/Cr(III)-Oxalate Salt with Water-Filled Nanochannels
AUTHORS:
Clémence Eboga Tanke, Bridget N. Ndosiri, Yves A. Mbiangué, Gouet Bebga, Justin Nenwa
KEYWORDS:
Crystal Structure, Chromium(III) Complex, Nanochannels, Coordination Polymer, Guest-Water Molecules
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.7 No.1,
January
25,
2016
ABSTRACT: A novel mixed barium(II)/silver(I)/chromium(III) oxalate salt, Ba0.5Ag2[Cr(C2O4)3]·5H2O
(1), with open architecture has been synthesized in water and characterized by
elemental analysis, vibrational and electronic spectra, and single crystal
X-ray structure determination. Compound 1 crystallizes in a monoclinic space
group C2/c, with unit cell parameters a = 18.179(3), b = 14.743(2), c = 12.278(2)Å, β = 113.821(3), V = 3010.34(90) Å3,
Z = 8. The structure is characterized by a network of anionic [Cr(C2O4)3]3- units connected through the O atoms of the oxalates to Ba2+ and Ag+ sites, forming a three-dimensional coordination polymer with one-dimensional
isolated nanochannels parallel to the c axis, and encapsulating hydrogen-bonded
guest water molecules. The bulk structure is consolidated by O–H···O bridgings
within the nanochannels and by coulombic interactions.