
%0 Journal Article
%A Hunter, B. A. 
%A Moussa, S. M. 
%A Fenton, R. R. 
%A Kennedy, B. J. 
%T Polymorphism and Phase Transitions in Bis(glycinato)copper(II). A Powder Diffraction Study
%J Australian Journal of Chemistry
%D 2002/08/01
%V 55
%N 5
%P 331-341
%K 
%R https://doi.org/10.1071/CH01091
%U https://www.publish.csiro.au/paper/CH01091 
%X Powder diffraction methods have been used to establish the structures of four known polymorphs of bis(glycinato)copper(II). The two cis-modifications are orthorhombic, and the two trans-complexes are monoclinic. Refinements of the structures, including the location of the hydrogen/deuterium atoms have been achieved utilizing Rietveld analysis of powder data. The cis-monohydrate complex crystallizes in the space group P212121 with lattice parameters a 10.8053(3), b 5.2101(1), and c 13.4983(4) Å. Upon dehydration, contraction along the a- and c-axes and elongation of the b-axis is observed. The anhydrous cis-complex also crystallizes in the space group P212121 with lattice parameters a 10.0673(7), b 5.3152(4), and c 13.212(1) Å. The trans-hydrated complex crystallizes in the space group I2/a with lattice parameters a 14.8218(3), b 5.2321(1), and c 9.6408(2) Å, and &#946; 87.243(1)&#176;. Dehydration of the complex affords the anhydrous modification which crystallizes in the space group P21/c with lattice parameters a 7.0831(6), b 5.1459(4), and c 9.4431(9) Å, and &#946; 107.506(4)&#176;. In all four modifications a network of hydrogen bonds stabilizes the complex. This study illustrates the current capabilities of powder diffraction techniques. 
