LAUSR

The crystals of methyl 3,5-dimethylbenzoate are composed of strands of C—H⋯O=C bonded molecules, which are further arranged into layers. As a result of the presence of two bromomethyl substituents in 3,5-bis(bromomethyl)phenyl acetate, molecular dimers formed by crystallographically non-equivalent molecules are connected to structurally different two-dimensional aggregates in which the bromine atoms participate in Br⋯Br bonds of type I and type II. In the case of 5-hydroxybenzene-1,3-dicarbaldehyde,which possesses three donor/acceptor substituents, the molecular association in the crystal creates a close three-dimensional network comprising Caryl—H⋯Ohydroxy, Cformyl—H⋯Oformyl and O—H⋯Oformyl bonds.