Herringbone array of hydrogen-bonded ribbons in 2-ethoxybenzamide from high-resolution X-ray powder diffraction.

摘要: In 2-ethoxybenzamide, C{sub 9}H{sub 11}NO{sub 2}, the amide substituents are linked into centrosymmetric head-to-head hydrogen-bonded dimers. Additional hydrogen bonds between adjacent dimers give rise to ribbon-like packing motifs, which extend along c axis and possess a third dimension caused by twisting of 2-ethoxyphenyl substituent with respect groups. The ribbons arranged in T-shaped herringbone pattern cohesion them is achieved van der Waals forces.