Abstract
The structure of Ni(Hpydc)2·3H2O (H2pydc = pyridine-2,6-dicarboxylic acid, also known as dipicolinic acid) has been reinvestigated at variable temperatures. At room temperature, it matches the known structure in the space groupP21/c, but at 180 K it undergoes a phase transformation to a twinned structure inCc. By 120 K, the structure is ordered and twinned withZ′ = 4, and shows interesting short hydrogen-bonding interactions that include the formation of hydroxonium species.
Publisher
International Union of Crystallography (IUCr)
Subject
Materials Chemistry,Metals and Alloys,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
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