
%0 Journal Article
%A Bott, RC 
%A Sagatys, DS 
%A Lynch, DE 
%A Smith, G 
%A Kennard, CHL 
%T The Preparation and Crystal Structure of Polymeric Anhydrous Sodium Hydrogen o-Phenylenedioxydiacetate
%J Australian Journal of Chemistry
%D 1992/05/01
%V 45
%N 5
%P 947-952
%K 
%R https://doi.org/10.1071/CH9920947
%U https://www.publish.csiro.au/paper/CH9920947 
%X The crystal structure of anhydrous sodium hydrogen o-phenylenedioxydiacetate , [Na2( Hbdda )2]n, has been determined by X-ray methods and refined to a residual R 0.031 for 1234 observed reflections. Crystals are monoclinic, space group C2/c with Z 4 in a cell of dimensions a 18.415(6), b 7.4667(7), c 16.354(7) Å ,&#946;112.61(2)º. The dimeric repeating unit has two centrosymmetrically related pentagonal pyramidal Na-O6 complex centres [Na-0, 2.272-2.439(2) Å ] bridged by carboxylate  oxygens. The pentagonal plane comprises four oxygens from the Hbdda ligand as well as one providing the bridging link. The axial bond gives the step-polymer link while the carboxylic acid proton is hydrogen bonded to a carboxylate oxygen of the inversion-related Hbdda ligand [O&#8230;O, 2.469(2) Å ]. 
