4‐Vinyl­benzyl analogs of adenine and uracil: reactive monomers for nucleobase polymeric resins

The crystal structures of 9‐(4‐vinyl­benzyl)­adenine, C₁₄H₁₃N₅, and 1‐(4‐vinyl­benzyl)­uracil, C₁₃H₁₂N₂O₂, are composed of zigzag ribbon‐like structures that are stabilized by conventional (N—H?N‐type) hydrogen bonds for the former and conventional (N—H?O‐type) and non‐conventional (C—H?O‐type) hydrogen bonds for the latter; the hydrogen‐bonding patterns are represented by graph‐sets R(9) and R(8), respectively. The adenine and uracil moieties in these alkyl­ated derivatives are planar and are inclined at angles of 84.44 (4) and 79.07 (7)°, respectively, with respect to the phenyl rings.