Non-merohedrally Twinned Crystal Structure of the Co-crystal Ethyl 6-(2-5-(Ethoxycarbonyl)-pyridin-2-yl-1,2-dihydroxyethyl)pyridine-3-carboxylateethyl 6-(2-5-(Ethoxycarbonyl)pyridin-2-yl-2-hydroxyacetyl)pyridine-3-carboxylate (0.69/0.31)

摘要

The two component molecules of the co-crystal 0.69(C18H20N2O6)?0.31(C18H18N2O6) lie on a center-of-inversion that exists midway along the ethylene chain connecting the two aromatic rings.The two molecules are superimposed.The crystal is also a non-morohedral twin with a minor 37.7(2)% component.The refinement of this twinned and disordered crystal structure is detailed.Crystal data:C18H19.38N2O6,monoclinic,P21/c,a = 17.1687(8),b = 5.4389(2),c = 9.3261(4),b = 95.270(5)o and V = 867.18(6)3 at-173 ℃.