Synthesis, Crystal Structure and Thermal Behavior of a 3-D Barium(II)/Iron(III)-Oxalate Polymer
2014
Reaction of Ba(NO3)2 with Fe(NO3)3·9H2O
and H2C2O4·2H2O in aqueous medium
readily affords, in high yield, the bimetallic complex polymer of chemical
composition {Ba6(H2O)17[Fe(C2O4)3]4}·7H2O
(1), consistent with the expected ratio of 3BaII vs. 2FeIII. Compound 1 was
fully characterized by elemental and thermal analyses, vibrational FTIR
spectroscopy, and by single crystal X-ray structure determination. The bulk
structure of 1 is a 3-D metal-organic framework held together by intermetallic
linkages across oxalate and aqua oxygen bridgings. Thermal analyses of 1 show significant weight losses corresponding to
water molecules (lattice and coordinated), followed by the decomposition of the
network.
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