Abstract
As part of our studies on the synthesis and the characterization of oxalate-bridged compounds M-ox-M (ox = oxalate dianion and M = transition metal ion), we report the crystal structure of a new oxalate-bridged Mn(II) phase, {(CH6N3)[Mn(C2O4)Cl(H2O)]·H2O} n . In the compound, a succession of Mn(II) ions (situated on inversion centers) adopting a distorted octa-hedral coordination and bridged by oxalate ligands forms parallel zigzag chains running along the c axis. These chains are inter-connected through O-H⋯O hydrogen-bonding inter-actions to form anionic layers parallel to (010). Individual layers are held together via strong hydrogen bonds involving the guanidinium cations (N-H⋯O and N-H⋯Cl) and the disordered non-coordinating water mol-ecule (O-H⋯O and O-H⋯Cl), as well as by guanidinium π-π stacking. The structural data were confirmed by IR and UV-Visible spectroscopic analysis.
Highlights
As part of our studies on the synthesis and the characterization of oxalatebridged compounds M–ox–M, we report the crystal structure of a new oxalate-bridged MnII phase
Oxalate anions have been demonstrated to be one of the most versatile bridging ligands for the construction of coordination polymers when combined with transition metal cations
We report the synthesis and crystal structure determination of a new oxalate-bridged coordination compound
Summary
Much attention had been devoted to the coordination chemistry of oxalate (ox) anions due to the interesting structural features and physical properties they possess (Chérif et al., 2011; Dridi et al, 2013; Decurtins et al, 1997). Is a promising cation with possibilities of forming onedimensional oxalato-based coordination polymers, as evidenced by reports describing the structures of several topologically similar MnII–ox–MnII chains [see, for example, Garcıa-Couceiro et al (2005) or Beznischenko et al (2009)]. In those compounds, the oxalate-bridged manganese framework may be considered as a single-chain magnet based on the oxalate linker The structural unit of (I), showing the atom-numbering scheme. Displacement ellipsoids are drawn at the 50% probability level for non-H atoms. Displacement ellipsoids are drawn at the 50% probability level for non-H atoms. [Symmetry codes: (i) x + 1, y + 1, z + 1; (ii) x + 1,
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