
%0 Journal Article
%A Lynch, Daniel E. 
%A Hayer, Ravinder 
%A Bagga, Sanjeev 
%A Parsons, Simon 
%T Two Crystal Polymorphs of 3-(Dimethylamino)benzoic Anhydride
%J Australian Journal of Chemistry
%D 2000/10/27
%V 53
%N 7
%P 593-596
%K Polymorph; crystal X-ray analysis; benzoic anhydride.
%R https://doi.org/10.1071/CH99145
%U https://www.publish.csiro.au/paper/CH99145 
%X Two polymorphs of 3-(dimethylamino)benzoic anhydride have been determined by single crystal X-ray diffraction analysis. Polymorph (1) is triclinic (P1&#8211;, a 7.112(3), b 9.289(4), c 13.364(5) &#197;, a 96.39(2), b 104.04(2), g 107.59(2)&#x02DA;, V 800.0(6) &#197; 3 , Z 2) with the full molecule in the asymmetric unit, whereas polymorph (2) is monoclinic (C2/c, a 10.892(3), b 11.855(4), c 13.164 &#197;, b 112.14(3)&#x02DA;, V 1574.5(9) &#197; 3 , Z 4) with the central oxygen atom across a twofold axis. Differing conformations and C&#8211;H hydrogen-bonding associations give rise to markedly different solid-state packing arrangements. 
