Anomalous stereochemistry of pyrazolato-3,5-dicarboxylato-bridged dinuclear chromate(III) complexes containing ethylenediamine-N,N'-dicarboxylates with entrapped unstable conformations: x-ray structure of Na[Cr(sub 2)(eddp)(Mu-pzdc)](1 dot)6H(sub 2)O

A report is presented that was prepared to study the X-ray structure of the eddp complex Na[Cr(sub 2)(eddp)(Mu-pzdc)](1 dot)6H(sub 2)O(eddp=ethylenediamine-N,N'- dipropionate) was determined to have a (sum-cis)-(unsym-cis) geometrical configuration with intramolecular three-center hydrogen bonds. The report stated that a series of the pzdc-bridged Cr(III)complexes the anomalous conformations in two different geometrical configurations which could be entrapped due to steregnostic coordination through the intramolecular N-H(3 dots)O hydrogen bond interaction.