Different packing motifs mediated by weak inter-actions and polymorphism in the crystal structures of five 2-(benzyl-idene)benzosuberone derivatives.

ABSTRACT: The syntheses and crystal structures of five 2-benzyl-idene-1-benzosuberone [1-benzosuberone is 6,7,8,9-tetra-hydro-5H-benzo[7]annulen-5-one] derivatives, viz. 2-(4-meth-oxy-benzyl-idene)-1-benzosuberone, C₁₉H₁₈O₂, (I), 2-(4-eth-oxy-benzyl-idene)-1-benzosuberone, C₂₀H₂₀O₂, (II), 2-(4-benzyl-benzyl-idene)-1-benzosuberone, C₂₅H₂₂O₂, (III), 2-(4-chloro-benzyl-idene)-1-benzosuberone, C₁₈H₁₅ClO, (IV) and 2-(4-cyano-benzyl-idene)-1-benzosuberone, C₁₉H₁₅NO, (V), are described. The conformations of the benzosuberone fused six- plus seven-membered ring fragments are very similar in each case, but the dihedral angles between the fused benzene ri

SUBMITTER: Seaman LS 

PROVIDER: S-EPMC6829743 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature