Trimethyl 3,3′,3′′-(benzene-1,3,5-triyl)tripropynoate

Abstract

In the title compound, C18H12O6, the alkyne bonds are distorted, featuring bond angles around the C—C[triple-bond]C—C group of 173.6 (1)/179.0 (1), 178.1 (1)/178.4 (1) and 174.9 (1)/175.9 (1)°, and the ester groups make angles of 3.5 (1), 13.8 (1) and 14.5 (1)° with the central benzene ring. In the crystal, molecules are connected in layers parallel to (131) by weak C—H...O hydrogen bonds, giving rise to a system of hydrogen-bonded ring motifs with graph sets R22(14) and R44(22). The layers are linked by C—H...O and C—H...π contacts.

Keywords

• crystal structure
• trimesic acid homologue
• C—H...O hydrogen bond
• C—H...π contact